Table of Contents
Note The terms “Unidirectional Path Switched Ring” and “UPSR” may appear in Cisco literature. These terms do not refer to using Cisco ONS 15xxx products in a unidirectional path switched ring configuration. Rather, these terms, as well as “Path Protected Mesh Network” and “PPMN,” refer generally to Cisco’s path protection feature, which may be used in any topological network configuration. Cisco does not recommend using its path protection feature in any particular topological network configuration.
For detailed information regarding features, capabilities, hardware, and software introduced with this release, refer to the “Release 6.0” version of the Cisco ONS 15454 Procedure Guide ; Cisco ONS 15454 Reference Manual ; Cisco ONS 15454 Troubleshooting Guide ; and Cisco ONS 15454 SONET TL1 Command Guide. For the most current version of the Release Notes for Cisco ONS 15454 Release 6.0.2, visit the following URL:
This section documents supplemental changes that have been added to the Release Notes for Cisco ONS 15454 Release 6.0.2 since the production of the Cisco ONS 15454 System Software CD for Release 6.0.2.
Review the notes listed below before deploying the ONS 15454. Caveats with DDTS tracking numbers are known system limitations that are scheduled to be addressed in a subsequent release. Caveats without DDTS tracking numbers are provided to point out procedural or situational considerations when deploying the product.
Rarely, the non-enhanced Muxponder unit does not pass Jitter Tolerance test from Trunk port to client port as per ITU-T G.825, 2 Mb/s mask, at the 10 Hz specific setpoint. The Muxponder should be configured with G.709 Off, FEC Off and Trunk signal provided by external Jitter test box, and the unit client port output monitored for errors, to see this issue. This issue will not be resolved. Note, however, that in normal network configurations the muxponder is operated with G.709 and FEC turned on, and the jitter tolerance tests pass.
Under specific conditions the non-enhanced MXPD does not pass the Telcordia GR-253/G.825 Jitter generation mask test on 10G TX Trunk port. The 2.5 G TX Client jitter generation is always within mask and does not exhibit this issue. This occurs only when, in SONET mode, there is no FEC, no G.709, and client interfaces are looped back, with non-synchronous clocking, and the jitter testbox TX connected to Trunk RX port, while the jitter testbox RX is connected to the Trunk TX port. The jitter testbox TX clock recovers from RX with an additional 5 ppm offset added. This issue will not be resolved.
An optical connector and optical attenuators inserted into the SFP may force the fiber against the shelf door when it is closed. Use the following types of optical connectors and optical attenuators when connecting to the SFP:
- Optical connectors: The length of the connector (starting from the ferule tip) plus the fiber boot must be 50 mm or shorter.
- Optical Attenuators: The following attenuator Cisco P/Ns are recommended:
During testing with the XC10G, jitter generation above 0.10 UI p-p related to temperature gradient testing has been observed. This effect is not expected to be seen under standard operating conditions. Changes are being investigated to improve jitter performance in a future release. DDTS numbers related to this issue include CSCdv50357, CSCdv63567, CSCdv68418, CSCdv68441, CSCdv68389, CSCdv59621, and CSCdv73402.
When using KLM type fuses with specific types of fuse and alarm panels, the PWR-REDUN alarm may not be displayed once the fuse is blown. A KLM fuse does not have a blown fuse indicator built into it. As a result, the blown fuse detection circuitry on the FAP may continue to provide voltage on its output despite a blown fuse.
Caution VxWorks is intended for qualified Cisco personnel only. Customer use of VxWorks is not recommended, nor is it supported by Cisco's Technical Assistance Center. Inappropriate use of VxWorks commands can have a negative and service affecting impact on your network. Please consult the troubleshooting guide for your release and platform for appropriate troubleshooting procedures. To exit without logging in, enter a Control-D (hold down the Control and D keys at the same time) at the Username prompt. To exit after logging in, type “logout” at the VxWorks shell prompt.
Note In releases prior to 4.6 you could independently set proxy server gateway settings; however, with Release 4.6.x and forward, this is no longer the case. To retain the integrity of existing network configurations, settings made in a pre-4.6 release are not changed on an upgrade to Release 6.0.x. Current settings are displayed in CTC (whether they were inherited from an upgrade, or they were set using the current GUI).
Rarely, autoprovisioned audits (those with the unique ID of 0) can become stranded after a bulk roll of VC LO circuits prior to deletion of those circuits. If an attempt was made previously to delete all such circuits, you can use subtractive logic to discover which circuits have become stranded. That is, matrices indicating usage in the node view, Maintenance > Cross-connect > Resource Usage window will indicate stranded circuits.
Once you have identified that there are stuck STSs, go to the card view for each affected trunk card and view the Maintenance > Loopback > SONET STS tabs. From here you can view all used STSs, including any stuck STSs. Determine which STSs in your network have no circuit associated with them, then create and subsequently delete a LO circuit on each affected STS. This will clean up the stuck STSs. This issue is resolved in Release 7.0.
A CTC client session can disconnect from an ONS node during simultaneous deletion of large numbers of VT level circuits (3000+). Connectivity to the node will recover without any user action. If the condition persists, restart the CTC session to reconnect. This issue is under investigation.
The error message ('null') is invalid when, in a failed merge operation on two portless circuits, one circuit loses its connection after the merge. You can see this if you merge two portless intranode path protection circuits, where one circuit has one source and two drops, and the other circuit has two sources and one drop. Though the two drops of the first circuit might be aligned with the two drops of the second circuit, all of them are inside one physical link (not a valid path protection topology). To recover from this situation, open a new CTC session. This will return the circuits to their status prior to the failed merge. This issue is resolved in Release 7.0.
When retrieving GBIC inventory for the FC_MR-4, nothing is returned for the CLEI code. In a future release, enhanced inventory information will be available for ONS GBICs. This will include the CLEI code.
When you create a bidirectional BLSR-path protection IDRI circuit using autorouting and select the PCA option for secondary spans, the circuit is created over working BLSR spans and does not use PCA spans. To enforce the use of the PCA option, provision the circuit using manual routing. This issue will be resolved in a future release.
The Wait To Restore (WTR) alarm does not appear to be raised for as long as the WTR timer is set for. The WTR is raised correctly, but the alarm is hidden for the first 12 seconds due to the clear soaking time for a CLDRESTART alarm. You can see this behavior if you set up a 1+1 bidirectional revertive protection group, remove the working card, and then reinsert the card. There are no plans to change this behavior.
If you create a PM schedule with the Start time for the PM report equal to 00:00 (in TL1, “0-0”), after a few minutes the PM report start time might change to 23:59 (in TL1, “23-59”). This issue will not be resolved.
A user might remain in the logged-in state after rebooting the PC while logged into a node running CTC. The user login will time out once the “Idle User Timeout” limit is up. Alternatively, you can log in as a superuser and force the user off. This issue will not be resolved.
When a new circuit is created around a ring (path protection or BLSR), the SD BER or SF BER alarm can be raised depending on the order in which the spans are provisioned. The alarms will eventually clear by themselves. Traffic is not affected. This issue will not be resolved.
When you auto-route a VT circuit on an ONS 15454 node, a path is computed based on the availability of STSs on the nodes involved. This selection process, when combined with a lack of VT matrix (or STS-VT connections) on an auto-route selected node, can result in the VT circuit creation failing with the message “unable to create connection object at node.” To correct this situation, manually route VT circuits in cases when auto-routing fails. The error message will indicate which node is at issue.
The APC procedure does not check consistency between the gain set point and the real gain, but rather only verifies the amplifier total output power. As a workaround, manual setting can be performed to align these values, although the discrepancy does not impact the normal functioning of the amplifier. This issue will not be resolved.
Clearing the displayed statistics for a port will also clear the displayed history for that port. Clearing the displayed statistics for all ports will also clear the displayed history for all ports. There is no warning message from the TCC2. If History information is to be retained, do not clear displayed statistics for any port without first documenting the displayed history information for the associated port. This issue will not be resolved.
After setting the node time (either manually or via NTP) you must wait for the endpoint of the interval to be reached before the end time will reflect the recently-set node time. Until this has occurred, the date time stamp for the end of the retrieved interval remains 12/31/69. This issue has been closed and will not be resolved.
CTC is unable to communicate with an ONS 15454 that is connected via an Ethernet craft port. CTC does, however, communicate over an SDCC link with an ONS 15454 that is Ethernet connected, yielding a slow connection. This situation occurs when multiple ONS 15454s are on a single Ethernet segment and the nodes have different values for any of the following features:
This situation can also occur immediately after the aforementioned features are enabled. Other hosts on the Ethernet segment (for example, the subnet router) may retain incorrect ARP settings for the ONS 15454s.
To avoid this issue, all nodes on the same Ethernet segment must have the same values for Enable OSPF on the LAN, Enable Firewall, and Craft Access Only. If any of these values have changed recently, it may be necessary to allow connected hosts (such as the subnet router) to expire their ARP entries.
You can avoid waiting for the ARP entries to expire on their own by removing the SDCC links from the affected ONS 15454 nodes. This will disconnect them for the purposes of the proxy ARP service and the nodes should become directly accessible over the Ethernet. Network settings on the nodes can then be provisioned as desired, after which the SDCC can be restored.
CVs are not positively adjusted after exiting a UAS state. When a transition has been made from counting UAS, at least 10 seconds of non-SES must be counted to exit UAS. When this event occurs, Telcordia GR-253 specifies that CVs that occurred during this time be counted, but they are not. There are no plans to resolve this issue at this time.
When the topology host is connected to multiple OSPF areas, but CTC is launched on a node that is connected to fewer areas, the topology host appears in CTC, and all nodes appear in the network view, but some nodes remain disconnected. This can occur when the CTC host does not have routing information to connect to the disconnected nodes. (This can happen, for example, if automatic host detection was used to connect the CTC workstation to the initial node.)
CTC will be able to contact the topology host to learn about all the nodes in all the OSPF areas, but will be unable to contact any nodes that are not in the OSPF areas used by the launch node. Therefore, some nodes will remain disconnected in the CTC network view.
To work around this issue, if no firewall enabled, then the network configuration of the CTC host can be changed to allow CTC to see all nodes in the network. The launch node must be on its own subnet to prevent network partitioning, and craft access must not be enabled. The CTC host must be provisioned with an address on the same subnet as the initial node (but this address must not conflict with any other node in the network), and with the default gateway of the initial node. CTC will now be able to contact all nodes in the network.
- OC12-4 allows provisioning of PJStsMon from 0 to 48. The workaround is to limit provisioning to between Off and 1 to 12 only.
- CTC displays “PJStsMon=off” in the standard provisioning pane when provisioning PJStsMon off; however, TL1 and the NE Defaults editor both display 0 for this same condition.
- If you only make changes to a single default in the NE defaults editor, you must click on another default or column before the Apply button becomes functional.
If you are deploying the Cisco ONS 15454 within a European Union country that requires compliance with the EN300-386-TC requirements for Conducted Emissions, you must obtain and install the Cisco ONS 15454 Conducted Emissions kit (15454-EMEA-KIT) in order to comply with this standard.
If you use CTC, JRE, and the Netscape browser with a Microsoft Windows platform, you must ensure that any new installation of Netscape uses the same Netscape directory as the previous installation did, if such an installation existed. If you install Netscape using a different path for the plugins directory, you will need to reinstall JRE so that it can detect the new directory.
Performing cross connect card switches repeatedly might cause a signal degrade condition on the lines or paths that can trigger switching on these lines or paths. If you must perform repeated cross connect card switches, lock out the corresponding span (path protection, BLSR, or 1+1) first. This issue will not be resolved.
Active cross connect (XC10G/XCVT) cards should not generally be physically removed. If the active cross connect or TCC2/TCC2P card must be removed, you can first perform an XCVT/XC10G side switch or TCC2/TCC2P reset and then remove the card once it is in standby, or you can perform a lockout on all circuits that originate from the node whose active cross connect or active TCC2/TCC2P will be removed (performing a lockout on all spans will also accomplish the same goal). No lockout is necessary for switches initiated through CTC or through TL1.
The TCC2/TCC2P does not support Ethernet polarity detection. The TCC+ and TCCI both support this feature. If your Ethernet connection has the incorrect polarity (this can only occur with cables that have the receive wire pairs flipped), the TCC+/I will work, but the TCC2/TCC2P will not. In this event, a standing condition, “LAN Connection Polarity Reverse Detected” (COND-LAN-POL-REV), will be raised (a notification will appear on the LCD, and there will be an alarm raised). This issue will most likely be seen during an upgrade or initial node deployment. To correct the situation, ensure that your Ethernet cable has the correct mapping of the wire wrap pins. For Ethernet pin mappings, consult the user documentation.
created, the alarm behavior is not the same as in two way circuit creation. In particular, for the one way circuit creation, UNEQ-V and PLM-V alarms are reported, and the circuit state remains OOS. This issue will be resolved in a future release.
When an SDH signal is sent into an ONS 15454 OC-12/STM-4 (IR, 1310 LR and 1550 LR) or an OC-48/STM-16 high-speed (IR and LR) port which has been configured to support SDH, an SD-P (Signal Degrade) alarm will appear as soon as the circuit is created. This alarm will continue to exist until the circuit is deleted.
To avoid this problem, when provisioning an OC-12/STM-4 (IR, 1310 LR and 1550 LR) or an OC-48/STM-16 high-speed (IR and LR) port to support SDH, disable the signal degrade alarm at the path level (SD-P) on the port.
Also, PM data at the path level will not be reliable. You must set associated threshold values to 0 in order to avoid threshold crossing alerts (TCA) on that port. The path threshold values to set to zero are CV-P, ES-P, SES-P, and UAS-P.
When an XC switch occurs, LOF is driven to the line side. On a DS1-14 this can cause us to see long switch times that are related to hardware issues if the “Treat LOF as a Defect” flag has been set. To avoid this issue, do not set the “Treat LOF as a Defect” flag to true on DS1-14 cards. A future release will remove the “Treat LOF as a Defect” option for this card.
An LOS alarm is cleared when switching to protect when the working card is on opposite side of the shelf from the protect card (in portless configuration) in a DS3XM-12 1:N protection group. An electrical port brought into IS state on the portless only card produces an LOS alarm. If you then switch to protect, the alarm appears to clear. To avoid this issue, do not bring electrical ports into IS state on a portless only card. This issue will be resolved in Release 7.0.
To see this, create a 1-way DS3XM-12 conversion circuit with the drop port state set to IS. Delete the conversion circuit, leaving the IS port state. Note that the DS-1 line state will now be OOS by design. If there is no circuit, DS-1 portless port lines will be placed in OOS state.
Deleting a DS3I 1:N protection group may leave the protect card LED in a standby state. This can occur in a DS3I 1:N protection group with a LOCKON applied to the working card (ONS 15454 ANSI chassis only). Upon deleting the protection group, the LED on the protect DS3I card and the CTC display are still in the standby state. Soft reset the protect card to update the LED on the card and in CTC. An alternative workaround is to remove the LOCKON before deleting the protection group. This issue will be resolved in a future release.
If L2 protocol tunneling is disabled on an interface when it is not a member of a bridgegroup, this can cause the CAM programming of STP MAC addresses to be incorrect. The spanning tree received on a node is not passed on to the host, and the spanning tree process might not converge due to the STP packets failing to reach the host. If this occurs, add the affected interface to a
In Asymmetric configuration, with autonegotiation enabled and flow control selected, an ML-series card might fail to synchronize with, or to recognize the asymmetric flow control. This issue is under investigation.
On Cisco ONS 15454s equipped with XCVT cross-connect cards, neither the E100T-12 nor the E1000-2 cards raise an alarm or condition in CTC when Ethernet traffic is predictably lost due to the following circumstances:
Circuits exist between Ethernet cards (E100T-12 and/or E1000-2) built over Protection Channel Access (PCA) bandwidth on BLSR spans. When BLSR issues a switch, the PCA bandwidth is preempted. Since there is no longer a connection between the ends of the Ethernet circuit, traffic is lost.
Multicast traffic can cause minimal packet loss on the E1000-2, E100-12, and E100-4 cards. Packet loss due to normal multicast control traffic should be less than 1%. This issue was resolved in Release 2.2.1 for broadcast, and in Release 2.2.2 for OSPF, and some multicast frames. As of Release 3.0.3, the ONS 15454 supports HSRP, CDP, IGMP, PVST, and EIGRP, along with the previously supported broadcast and OSPF.
Note If multicast is used for such applications as video distribution, significant loss of unicast and multicast traffic will result. These cards were not designed for, and therefore should not be used for, such applications.
Note If the multicast and flood traffic is very rare and low-rate, as occurs in most networks due to certain control protocols and occasional learning of new MAC addresses, the loss of unicast frames will be rare and likely unnoticeable.
Multicast MAC addresses used by the control protocols in Table 4 have been added to the static MAC address table to guarantee no loss of unicast traffic during normal usage of these MAC addresses.
Starting with Release 2.2.0, each E100/E1000 card can be configured as a single-card EtherSwitch configuration to allow STS-12c of bandwidth to be dropped at each card. The following scenarios for provisioning are available:
When deleting and recreating Ethernet circuits that have different sizes, you must delete all STS circuits provisioned to the EtherSwitch before you create the new circuit scenario. (See the preceding “Single-card EtherSwitch” section for details on the proper order of circuit creation.) Enable front ports so that the VLANs for the ports are carried by the largest circuit first. A safe approach is to enable the front port before you create any circuits and then retain the front port VLAN assignment afterwards. If you break the rules when creating a circuit, or if you have to delete circuits and recreate them again, delete all circuits and start over with the largest first.
When you drop two 3c multicard EtherSwitch circuits onto an Ethernet card and delete only the first circuit, you should not provision STS-1 circuits to the card without first deleting the remaining STS-3c circuit. If you attempt to create an STS-1 circuit after deleting the first STS-3c circuit, the STS-1 circuit will not work and no alarms will indicate this condition. Under rare conditions, this could trigger a TCC reset. To avoid a failed STS-1 circuit and other possible problems, delete the second STS-3c prior to creating any STS-1 circuit.
On an ML-series RPR ring circuit deletion or creation causes an approximately 200 ms traffic loss. To avoid this issue, from the ML-series CLI, perform a “shutdown” on both ends of the circuit prior to circuit changes. This issue will not be resolved.
You must issue a “shut” command to both ends of a POS circuit before placing the circuit OOS, and issue IS before a “no shut” command. Placing a POS circuit OOS without shutting down can cause long traffic hits. This issue will not be resolved.
You must issue a “shut” on both ends of affected POS circuits before performing a maintenance action on those circuits. If a POS circuit is restored without first issuing the shut commands, one end of the circuits could come up before the other. During that time, traffic is lost because the other end is not up yet. This issue will not be resolved.
A monitor command may disappear from the configuration after a TCC reboots. To avoid this issue, use the exec command, “terminal monitor,” instead (a minor drawback is that this command applies to all VTYs), or, alternatively, reapply the monitor command after connection is lost. This is as designed.
The ML-series cards always forward Dynamic Trunking Protocol (DTP) packets between connected devices. If DTP is enabled on connected devices (which might be the default), DTP might negotiate parameters, such as ISL, that are not supported by the ML-series cards. All packets on a link negotiated to use ISL are always counted as multicast packets by the ML-series card, and STP and CDP packets are bridged between connected devices using ISL without being processed. To avoid this issue, disable DTP and ISL on connected devices. This functionality is as designed.
Under certain conditions, the flow-control status may indicate that flow control is functioning, when it is not. Flow-control on the ML-series cards only functions when a port-level policer is configured. A port-level policer is a policer on the default and only class of an input policy-map. Flow-control also only functions to limit the source rate to the configured policer discard rate, it does not prevent packet discards due to output queue congestion.
Therefore, if a port-level policer is not configured, or if output queue congestion is occurring, policing does not function. However, it might still mistakenly display as enabled under these conditions. To avoid this issue, configure a port-level policer and prevent output queue congestion. This issue will not be resolved.
If no BGP session comes up when VRF is configured and all interfaces have VRF enabled ensure that at least one IP interface (without VRF) is configured and add an IP loopback interface on each node. This issue will not be resolved.
Issuing a “clear IP route *” command can result in high CPU utilization, causing other processes to be delayed in their execution. To avoid this issue do not clear a large number of route table entries at once, or, if you must use the “clear IP route *” command, do not install more than 5000 EIGRP network routes.
The trunk port service state for the TXPP and TXP cards does not transition to OOS-AU,FLT in the presence of an LOS-P alarm. This can occur when the payload signal for LOS-P is missing for the particular port type. This issue will be resolved in a future release.
An unexpected Mismatch Equipment Attributes (MEA) transient alarm can occur on rapidly inserting and removing a PPM. This issue can occur with a TXP_MR_10E-L for which you preprovision an OC-192 PPM. The transient alarm is raised on the PPM. This issue is resolved in Release 7.0.
Under very specific conditions the MXPD fails the Telcordia GR-253/G.825 Jitter generation mask test on the 10G transmit trunk port. The 2.5 G transmit client jitter generation remains within mask and does not exhibit this issue.
This causes the far end trunk to switch from protect to working span. Similarly, removal of the receive Client fiber at far end causes the near end trunk to switch from the protect to the working span. (Note that the traffic is already lost due to the receive client fiber pull.) To work around this issue, manually switch via CTC from the working to the protect span. This issue will not be resolved.
Now, when you click Apply, CTC issues the error message: “Error applying changes to row2 peer trunk port must not be IS.” Port 3 is still IS and the loopback changes are not applied. You must place Port 3 in the OOS-MT state, apply the changes, and then change the loopback to recover.
After a database restore TXPP trunk ports might report SF, resulting in a traffic outage. The SF occurs when you restore the database and then put the port OOS for DWDM cards; then the operating mode in the database is different from the current operating mode. To avoid this issue, either put the DWDM port OOS before restore the database, or, after restoring the database, reset the DWDM cards. This issue will not be resolved.
Far end traffic does not switch in line termination mode with .G709 off. This can occur with non-revertive Y-cable, and DCC enabled, under certain specific conditions. To avoid this issue, turn on .G709 when in line mode. This issue will not be resolved.
TXP-MR-2.5G F1-UDC may not be passed through in a line-terminated configuration with OTN off. This can occur with clean, OC-3/STM-1, line-terminated traffic, with OTN disabled, when you create a D1-D3 tunnel, a D4-D12 tunnel, and an F1-UDC from client to client. This issue will not be resolved.
If you go to the Overhead Circuits Tab in network view and select any User Data, F1 or User Data D4-D12 circuit type, no nXP cards are available for selection in the Endpoints. However, user Data type circuits can still be made end-to-end (where “end-to-end” refers to external cards, such as AIC to AIC) if the nXP cards are put in Transparent mode. This issue will not be resolved.
With TXPP cards, a traffic loss up to six seconds can occur during a DWDM protection switch. This behavior may be exhibited during protection switches by certain third-party fiber channel switches due to loss of buffer credits resulting in a reconvergence of the fiber channel link. This issue will not be resolved.
Once engaged, ALR will not restart on the trunk lines of a TXP or TXPP card. This occurs whenever ALR engages on the trunk lines of a TXP or TXPP card and the recover pulse width is provisioned to less than 40 seconds. This is a function of the trunk laser turn-on time, and the limiting recovery pulse width will vary by card. To avoid this issue, provision the pulse width to 40 seconds or more. This issue will not be resolved.
With ALS mode configured as “Auto Restart” or “Manual Restart,” it is possible the ALS Pulse Duration Recovery time can be set to values out of ITU-T recommendation G.664. You can use values out of the range defined in ITU-T recommendation G.664 only in order to interoperate with equipment that lasers cannot turn on or off within the required pulse time. To stay within the specification, you can set this value to 2 seconds and up to 2.25 seconds.
On the TXPP, the default value for Tx Power High for TCAs & Alarms is too high for the trunk ports. Since Tx Power TCA and Alarm are not supported for trunk ports, this caveat is for informational purposes only.
During a Y-Cable protection switch, the client interface sends 200,000 to 300,000 8B/10B errors towards the attached Catalyst 3550 switch. The switch reacts to this large amount of 8B/10B errors by reinitializing the interface and spanning tree. The end result is that a protection switch can lead to a 30-45 second traffic hit if the switch is running spanning tree (default mode). This is expected behavior.
For the TXPP, attenuating Port 2 Rx signal, SD, and SF alarms are not declared before LOC is raised. This is due to the intrinsic design of the optical interface, which allows required BER performances with dispersion and OSNR penalties.
You cannot provision the FLM-150 and OC-3 Express in 1+1 revertive switching mode. The problem occurs when the ONS 15454 issues a user request in revertive mode to the protect channel. When the user request is cleared, the ONS 15454 issues a No Request. However, the FLM-150 and OC-3 Express issues a Do Not Revert, which causes traffic to remain on the protection channel. Based on Telcordia GR-253, section 18.104.22.168, the FLM-150 and the OC-3 Express should respond with a No Request.
Before secondary node isolation in a scenario where DRI PCA traffic is provisioned on a protect channel corresponding to a working channel for active DRI protected traffic, with the secondary node of the DRI PCA configured as the primary node of the protected DRI traffic, and the primary node of the DRI PCA configured as the secondary node of the protected DRI traffic, you must perform a user service selector switch command on DRI protected traffic on the secondary node for DRI PCA traffic (primary node for DRI protected traffic). Failing to issue the switch could result in loss of DRI protected traffic during the secondary node isolation. This issue will be resolved in Release 7.0.
Extra traffic is not restored when an SF-R occurs on the same span where a lockout of protect is applied at the opposite node, and where the extra traffic is sourced, destined, or travels through the node with the SF-R. to work around this, issue a lockout on each end of the span at the node where the SF-R occurs. Extra traffic should then be restored. This issue will not be resolved.
DS3 PCA traffic may take up to 20 seconds to recover after a BLSR switch is cleared. This can occur with DS3 PCA traffic on two-Fiber or four-Fiber BLSR configuration with XCVT cards in the same nodes as the DS3 cards. This issue will be resolved in a future release.
You must lock out protection BLSR, 1+1, and path protection traffic to avoid long, or double traffic hits before removing an active XCVT or XC10G card. You should also make the active cross connect card standby before removing it.
In a two ring, two fiber BLSR configuration (or a two ring BLSR configuration with one two fiber and one four fiber ring) it is possible to provision a circuit that begins on one ring, crosses to a second ring, and returns to the original ring. Such a circuit can have protection vulnerabilities if one of the common nodes is isolated, or if a ring is segmented in such a way that two non-contiguous segments of the circuit on the same ring are each broken.
Traffic hits can occur in an unprotected to path protection topology upgrade in unidirectional routing. If you create an unprotected circuit, then upgrade the unprotected circuit to a path protection circuit using Unprotected to path protection wizard, selecting unidirectional routing in the wizard, the circuit will be upgraded to a path protection circuit. However, during the conversion, traffic hits on the order of 300 ms should be expected. This issue will not be resolved.
Active cross connect (XC10G/XCVT) cards should not generally be physically removed. If the active cross connect or TCC2/TCC2P card must be removed, you can first perform an XCVT/XC10G side switch or TCC2/TCC2P reset and then remove the card once it is in standby, or you can perform a lockout on all circuits that originate from the node whose active cross connect card or active TCC2/TCC2P will be removed (performing a lockout on all spans will also accomplish the same goal). No lockout is necessary for switches initiated through CTC or through TL1.
When a rollTo leg is not receiving a good signal, and because of this the rollPending alarm is not cleared, there is no alarm indicating the reason that the RollPending alarm fails to clear. This issue is resolved in Release 7.0.
When a TL1 session to a remote node (ENE) is established via a gateway node (GNE) and you have changed the node name of the ENE via either TL1, CTC or SNMP, then you must wait for about 30 seconds to issue a TL1 command via the GNE. This delay is to permit the updates to propagate to all nodes in the network. During this transition, neither the old node name nor the new node name can be used in the TL1 session to access the ENE. This 30 second window may be reduced in a future release.
In a configuration with OC-48 Any Slot cards and an STS-24c circuit, provisioned between G1000-4 cards with traffic going over the OC-48 span, extracting the G1000-4 card at one end of the STS-24c circuit before deleting the circuit will result in a traffic hit on all existing SONET circuits defined over that same span. This only occurs when the STS-24c is provisioned on timeslot 25.
In the Cisco ONS 15454 Procedure Guide, Release 4.1.x, refer to the “NTP-77 Delete Circuits” procedure to delete the 24c circuit before removing the card. Once you have deleted the circuit, refer to the “DLP-191 Delete a Card from CTC” task (also in the procedure guide) to delete the G1000-4 card. This issue is resolved in Release 6.0.
Starting in calendar year 2007, daylight savings summer-time rules may cause Cisco IOS to generate timestamps (such as in syslog messages) that are off by one hour. This issue is resolved in Release 6.0.2.
When a node is in secure mode, attempting to change the default router for the backplane to another subnet results in an xSubnetsDifferent exception being raised that prevents the default router change from taking effect. If the node is not locked in secure mode, you can revert to unsecure mode, change the subnet, then use the secure mode wizard to return the node to secure mode. If the node is locked in secure mode, contact the Cisco TAC for support. This issue is resolved in Releases 5.0.6 and 6.0.1.
In a metro access network the amplifiers don't switch to constant gain. This issue can be seen when recreating a circuit previously deleted without re-executing ANS. Relaunching ANS manually every time avoids this issue. This issue is resolved in Release 6.0.1.
In Release 6.0.x a Mismatch Equipment Attributes (MEA) alarm is raised incorrectly against the B-Side BIC (EIA) on an ONS 15454 node using the 15454-SA-HD (high density) chassis with 1BNCB48, 1BNCB24, or 1SMBB84 EIAs installed. The 1BNCB48, 1BNCB24, and 1SMBB84 EIA panels are compatible with the 15454-SA-HD shelf assembly; however, the software in Release 6.0 fails to recognize their compatibility. The MEA alarm raised as a result of this issue is not service impacting, but does cause a standing alarm.
As a workaround to the standing alarm, you can change the BIC-MEA alarm severity by creating and using a custom alarm profile following the steps that apply for your network in the NTP-A71 Create, Download, and Assign Alarm Severity Profiles procedure of the Manage Alarms chapter in the Cisco ONS 15454 Procedure Guide, Release 6.0. This issue is resolved in Release 6.0.1.
When a fault condition exists against a circuit or port that is in the OOS-MT or OOS-AINS state (or when you are using the “Suppress Alarms” check box on the CTC Alarm Behavior pane), the alarm condition is not assigned a reference number. If you were to place the circuit or port in service at this time, in the absence of the reference number, the CTC alarm pane would display the condition with a time stamp indicating an alleged, but incorrect, time that the autonomous notification was issued. Clicking the CTC alarm “Synchronize” button at this stage will correct the alarm time stamp. There is no way to remedy the lack of reference number. This issue is resolved in Release 6.0.
A Maintenance user is mistakenly allowed to edit Optimized 1+1 attributes that are only meant to be editable by a Superuser. The “Edit” button will be greyed out for user who have no permission to edit, but CTC doesn't prevent a user from double-clicking on the table entry to edit the attributes. This issue is resolved in Release 6.0.
An LOP-P alarm can be inadvertently cleared by an LOS that is raised and cleared. On OC48AS, OC192, and OC12-4 cards, when an LOP condition and an LOS condition are both present on the input, an LOS will be raised as per Telcordia GR 253 alarm hierarchy. However, upon clearing the LOS with the LOP still present, the LOP alarm, which should then be raised, is not. An AIS-P condition will be visible. This issue is resolved in Release 6.0.
In a 1:N protection group, where a protect card is protecting a failed card and another working card, which is missing, has a lockon condition, upon removing the lockon condition from the missing working card, the protect card may switch from the card it had been protecting to carry the traffic of the missing working card that just had the lockon removed. To avoid this issue, replace the failed working card before removing the lockon. This issue is resolved in Release 6.0.
- Initially should have Working slots being Active and protect card on standby.
- Should have a port configured in EC1 mode and a circuit running on that port and make sure traffic is fine.
- Then the following occurs:
On the DS3/EC1-48 card if the card is in slot 1, port 14 and 27 might not declare LOS properly and might experience dribbling bit errors. If the DS3/EC1-48 card is in slot 17, port 14 and 27 might not declare LOS properly and might experience dribbling bit errors. If the DS3/EC1-48 card is in slot 2, port 37 might not declare LOS properly and might experience dribbling bit errors. This issue is resolved in Release 6.0.2.
Two ports of HD DS3-48 packs used in Slot 2 have reduced input sensitivity. Ports 37 and 43 have low sensitivities considering adjacent ports 36 and 44 have over 8 dB of additional input sensitivities. This issue is resolved in Release 6.0.2.
DS1-14 working cards in a 1:N configuration will continuously reboot once one of the working cards enters a wait to restore (WTR) state; for example, due to a hard or soft reset. If you remove and then reseat, or soft reset a working DS1-14 card in a 1:N protection group, after that card comes up any working cards in the protection group might continuously reboot, including the original card that was removed or reset. This causes traffic loss if more than one card is rebooting at the same time, which does happen. This issue is resolved in Releases 6.1, 6.2, 7.0, and maintenance Release 6.0.1.
DS1-14 cards can have borderline or long switch times when a manual switch command is issued to switch traffic from the protect card while the working card is in WTR. The longest switch time thus far observed is 100 ms. This issue can be seen in a 1:N protection group with 4 or 5 working cards. It is less likely to occur when there are 3 or less working cards, and not expected or known to occur in a 1:1 configuration. If you avoid using the manual switch command on the active protect card when the working card is in WTR, you will not see this issue. This issue is resolved in Releases 6.0.1, 6.1, 6.2, and 7.0.
When a DS3 STS1 path protection circuit that is not a “Go and Return” circuit is upgraded to BLSR via ISTU, the circuit might take a long hit in one direction. To avoid this issue use Go and Return UPSR circuits when upgrading DS3 STS circuits from Unprotected to path protection. This issue is resolved in Release 6.0.
In a 1:N protection group, the DS3N card will attempt to protect a preprovisioned card (that is, when you right-click an empty card slot in the CTC node view and select the DS3 card), leaving it unavailable to protect another, actual card that is also in the protection group, should that card fail. To avoid this issue, do not include the pre-provisioned card in the protection group. Once the card is physically installed, you can edit the protection group and add the card. This issue is resolved in Release 6.0.
The DS1 port status on the DS3XM-12 card behaves differently from that of other cards. When you modify the DS3 state, the DS1 state is generated based on the DS3 state, and on the existence of STS or VT circuits. This difference is documented in Release 6.0.
IOS does not allow telnet connections when there are simultaneous Telnet requests, even though there might be unused tty lines available. If this issue occurs, a “No Free TTYs error” message is displayed. This issue is resolved in Release 6.0.
A specifically crafted Transmission Control Protocol (TCP) connection to a telnet or reverse telnet port of a Cisco device running Internetwork Operating System (IOS) might block further telnet, reverse telnet, Remote Shell (RSH), Secure Shell (SSH), and in some cases Hypertext Transport Protocol (HTTP) access to the Cisco device. Telnet, reverse telnet, RSH and SSH sessions established prior to exploitation are not affected.
When traffic is switched from one GEC member to the other GEC member in a DRPRI node, the traffic hits could be between 400 ms and 2 seconds. This issue can occur when one of the GEC member interfaces goes down. This issue is resolved in Release 6.0.
Loss of Ethernet signal on one of the front ports takes longer than expected to be propagated to the remote port. Link integrity operates slower than expected for Ethernet failures (though it works as expected for SONET failures). To see this, any condition that causes an Ethernet loss of signal (removal of a front port Ethernet cable, for example) will invoke the Ethernet integrity function. This issue is resolved in Release 6.0.
Facility Loopback on a TXP-MR-10E trunk port can cause a traffic outage. This can occur when you have two TXP-MR-10E cards on two ETSI systems connected to each other on trunk ports, with running traffic, and a GCC is created, then a Facility (LINE) loopback is set on the Trunk port of one TXPs. Traffic goes down permanently and the following conditions are reported by the transponder where the loopback has been set:
- ODUK-OCI-PM, NR, ODUk: Open Connection Indication
- PTIM, NR, Payload Type Identifier Mismatch
- OTUK-IAE, MN, OTUk: Incoming Alignment Error
If, on a TXP-MR-10E card client port, the “synch msg” option is deselected (SSM-OFF) and then reselected, the message synchronization remains OFF. This can occur when you have two TXP-MR-10E cards connected via their trunk ports, the client port is the timing source for the node, and Synch messages are ON. When Synch messages are turned off from CTC, and then ON, the SSM-OFF message remains. To recover from this issue perform a software reset of the affected card. This is non-traffic affecting. This issue is resolved in Release 6.0.
If two TXPP-MR-2.5G units are connected via trunk ports, with the Working Trunk facility set to OOS,DSBLD state, and a FORCE switch is applied on the working trunk, and then the working port is put into OOS,DSBLD state, the WKSWPR condition in the Conditions pane fails to clear. This issue is resolved in Release 6.0.
The CTC Alarms/Conditions pane does not show the daylight savings time (DST) properly for the new DST rules applicable from 2007 forward. As per the change in energy policy in the United States of America, the DST start date is now the 2nd Sunday of March and the DST end date is the 1st Sunday of November. Between the 2nd Sunday of March 2007 and the 1st Sunday of April 2007, and between the last Sunday of October 2007 and the 1st Sunday November of 2007, CTC and TL1 follow the old DST rules. This issue is resolved in Release 6.0.2 .
The “Failed SW-Prot-Ring” alarm reports inconsistently. The alarm only sometimes appears when a Lockout of Protection is present on the BLSR and a transmit or receive fiber is pulled on the node with the Lockout. This issue is resolved in Release 6.0.
A path protection/SNCP circuit with a defect signal present (for example, AIS-P or AIS-V) on the protect path will produce RDI-P or RDI-V upstream of the detection point, but these signals will not be detected or indicated. This issue is resolved in Release 6.0.
When you have never previously installed the online user manuals on your workstation (PC or UNIX) and you click the Help > User Manuals menu in CTC, there is no error message instructing you to install the online manuals. You must install the online help from the software or documentation CD prior to selecting it from the menu. An error message for the case in which the help is not installed is displayed in Release 6.0.
Release 6.0.x introduces the XC-VXC-10G card. You can upgrade to the XC-VXC-10G from XC10G cards (as described in the user documentation). Upgrading a system to XC-VXC-10G from an earlier cross-connect module type is performed in-service, with hitless operation (less than 50-ms impact to any traffic). The XC-VXC-10G card is deployed in Slots 8 and 10 (only redundant operation is supported).
The XC-VXC-10G card establishes connections at the STS and VT levels. The XC-VXC-10G provides STS-192 capacity to Slots 5, 6, 12, and 13, and STS-48 capacity to Slots 1 to 4 and 14 to 17. STS cross-connections are nonblocking, so any STS-1 on any port can be connected to any other port.
The XC-VXC-10G card manages up to 1152 bidirectional STS-1 ports and 2688 bidirectional VT1.5 ports. The TCC2/TCC2P card assigns bandwidth to each slot on a per STS-1 or per VT1.5 basis. The switch matrices are fully crosspoint and broadcast supporting.
- 1152 STS bidirectional ports
- 576 STS bidirectional cross-connects
- 2688 VT1.5 ports via 96 logical STS ports
- 1344 VT1.5 bidirectional cross-connects
- Nonblocking at the STS level
- VT1.5, STS-1/3c/6c/12c/48c/192c cross-connects
The XC-VXC-10G supports errorless side switches (switching from one XC-VXC-10G on one side of the shelf to the other XC-VXC-10G on the other side of the shelf) when the switch is initiated through software and the shelf is equipped with TCC2/TCC2P cards.
A DS3XM card can demultiplex (map down to a lower rate) M13-mapped DS-3 signals into 28 DS-1s that are then mapped to VT1.5 payloads. The VT1.5s can then be cross-connected by the XC-VXC-10G card. The XC-VXC-10G card can host a maximum of 1344 bidirectional VT1.5s.
Cross-connect and provisioning information is established through the user interface on the TCC2/TCC2P card. In turn, the TCC2/TCC2P card establishes the proper internal cross-connect information and relays the setup information to the XC-VXC-10G card so that the proper cross-connection is established within the system.
Release 6.0.x introduces the 15454_MRC-12 multirate card. You can upgrade to a 15454_MRC-12 card from the one port OC12/STM-4 or OC48/STM-16 card. The 15454_MRC-12 card provides up to twelve OC-3/STM-1 ports, twelve OC-12/STM-4 ports, or four OC-48/STM-16 ports using Small Form-factor Pluggables (SFPs), in any combination of line rates. All ports are Telcordia GR-253 compliant. The SFP optics can use SR, IR, LR, coarse wavelength division multiplexing (CWDM), and DWDM SFPs to support unrepeated spans. Refer to the user documentation for more information about SFPs.
The ports operate at up to 2488.320 Mbps over a single-mode fiber. The 15454_MRC-12 card has twelve physical connector adapters with two fibers per connector adapter (Tx and Rx). The card supports VT payloads, STS-1 payloads, and concatenated payloads at STS-3c, STS-6c, STS-9c, STS-12c, STS-18c, STS-24c, STS-36c, or STS-48c signal levels. It is fully interoperable with the ONS 15454 G-Series Ethernet cards.
The 15454_MRC-12 port contains a transmit and receive connector (labeled) on the card faceplate. The card supports 1+1 unidirectional and bidirectional facility protection. It also supports 1+1 protection in four-fiber BLSR applications where both span switching and ring switching might occur. You can provision this card as part of a BLSR, path protection, or 1+1 linear configuration.
The maximum bandwidth of the 15454_MRC-12 card is determined by the cross-connect card and slot position of the 15454_MRC-12 card. The maximum bandwidth differs for cards in a drop slot (Slots 1–4 or 14–17) and those in a trunk slot (Slots 5–6 or 12–13). Consult the user documentation for specific bandwidths available per slot cross connect card.
Release 6.0.x introduces the OC192SR1/STM64IO Short Reach and OC192/STM64 Any Reach card (also referred to as the “OC192-XFP” card). The OC192SR1/STM64IO Short Reach and OC192/STM64 Any Reach card provides a single OC-192/STM-64 interface, as follows.
The interface operates at 9.952 Gbps over single-mode fiber spans and can be provisioned for both concatenated and nonconcatenated payloads on a per VC-4/STS-1 basis. Specification references can be found for the OC-192/STM-64 interface in ITU-T G.691, ITU-T G.693, and ITU-T G.959.1, and Telcordia GR-253.
The optical interface for this card uses a 10-Gbps Form-factor Pluggable (XFP) optical transceiver that plugs into a receptacle on the front of the card. OC192SR1/STM64IO Short Reach is used only with an SR-1 XFP, while OC192/STM-64 Any Reach can be provisioned for use with an SR-1, IR-2, or LR-2 XFP module. The XFP SR, IR, and LR interfaces each provide one bidirectional OC192/STM64 interface compliant with the recommendations defined by ITU-T G.91. SR-1 is compliant with ITU-T I-64.1, IR-2 is compliant with ITU G.691 S-64.2b, and LR-2 is compliant with ITU G.959.1 P1L1-2D2.
Release 6.0.x introduces the ONS 15454 DS1/E1-56 card. The ONS 15454 DS1/E1-56 card provides 56 Telcordia-compliant, GR-499 DS-1 ports per card, or 56 E1 ports per card. Each port operates at 1.544 Mbps (DS-1) or 2.048 Mbps (E1). The DS1/E1-56 card operates as a working or protect card in 1:N protection schemes, where N <= 2. For SONET applications, the DS1/E1-56 card requires a high-density (HD) shelf (15454-SA-HD), UBIC EIA, and Software Release 6.0 or greater.
The DS1/E1-56 card can be used with the XCVT, XC10G, or XC-VXC-10G cross-connect cards. For ONS 15454 DS1/E1-56 card slots, connectors, card level indicators, port level indicators, and operational constraints, see the user documentation.
Release 6.0.x introduces the ML100X-8 data card. The ML100X-8 card provides eight ports with 100 base FX interfaces. The FX interfaces support one of two connectors, an LX SFP or an FX SFP. The LX SFP is a 100 Mbps 802.3-compliant SFP that operates over a pair of single-mode optical fibers and includes LC connectors. The FX SFP is a 100 Mbps 802.3- compliant SFP that operates over a pair of multimode optical fibers and includes LC connectors. For more information on the Single and Multi mode SFPs supported for the ML100X-8 consult the user documentation.
The card features two virtual packet over SONET (POS) ports with a maximum combined bandwidth of STS-48. The ports function in a manner similar to OC-N card ports, and each port carries an STS circuit with a size of STS-1, STS-3c, STS-6c, STS-9c, STS-12c, or STS-24c.
The ML-Series POS ports supports virtual concatenation (VCAT) of SONET circuits and a software link capacity adjustment scheme (SW-LCAS). The ML-Series cards support a maximum of two VCAT groups with each group corresponding to one of the POS ports. Each VCAT group must be provisioned with two circuit members. An ML-Series card supports STS-1c-2v, STS-3c-2v and STS-12c-2v.
The ML100X-8 card works in Slots 1 to 6 or 12 to 17 with the XC10G or XC-VXC-10G cross-connect cards. It works only in high-speed slots only (Slots 5, 6, 12, or 13) with the XC or XCVT cross-connect card.
CTC can incur either repeated failures when you attempt to log in to an NE, and/or a very long time to discover all ENEs behind a GNE (could be over 30 minutes on a medium sized network). This issue affects all ONS 15xxx releases from R4.1 to 7.2.
This condition is more likely to happen on Windows XP after an upgrade to Service Pack 2, and when the network is made of a medium to large number of GNEs/ENEs with SOCKS enabled. This condition can also happen in the case of networks with poor connectivity between CTC and the GNEs.
The solution to this problem involves an enhancement to the SOCKS discovery protocol by introducing the concept of designated SOCKS servers. A designated SOCKS server is a NE that runs SOCKS, is LAN connected and has been explicitly marked as a potential SOCKS server by the user.
CTC allows the user to enter an unlimited number of designated SOCKS servers. When designated SOCKS servers are defined, the automatic SOCKS server discovery protocol is disabled, resulting in substantial performance improvement during CTC login and ENE discovery.
The list of designated SOCKS servers can be edited in the CTC Preferences dialog (Menu Edit | Preferences…) under the new SOCKS tab. See Figure 1.
To add a new designated SOCKS server, enter its IP address or DNS name in the top text field then click Add (or press ENTER). To remove a designated SOCKS server, select one or more entries in the list (using CTRL-click), then click Remove. All entries can be checked by clicking the "Check All Servers…" button. This check consists in trying to connect to the SOCKS port (port # 1080) of every entry. When this button is clicked, a dialog (Figure 2) with a progress bar will popup and will go away by itself when all entries have been checked or when the Stop button is clicked.
The example in Figure 3 shows that all entries were good except for the third IP address in the list.
- Entry does not correspond to a valid DNS name.
- Numeric IP address is invalid.
- Entry is not reachable (routing problem).
- Entry is reachable but the SOCKS port is not reachable (firewall problem).
Duplicate entries are rejected with an error message upon validation of the pane. Clicking on Apply or OK will save all entries in the user's preferences file (regardless of the servers check results). The list of designated SOCKS servers will need to be repopulated if the user loses his preferences file. After Apply or OK, the new list of designated SOCKS servers is effective immediately. Removing a server from the list will not impact existing SOCKS proxying involving that server in the current CTC.
Release 6.0.x supports errorless side switching (switching from one card on one side of the shelf to the other card on the other side of the shelf) for XC-VXC-10G cross connect cards in combination with TCC2/TCC2P control cards. Specifically, the following switch types and configurations are supported as errorless.
- XC-VXC-10G side switch initiated through CTC or TL1
- TCC2/TCC2P side switch initiated through CTC or TL1
- Soft reboot of XC-VXC-10G or TCC2/TCC2P cards initiated through CTC or TL1
- The 15454_MRC-12 card
- The DS1/E1-56 card
- The OC192SR1/STM64IO Short Reach and OC192/STM64 Any Reach cards
- The ONS 15454 DS3/EC1-48 card
Note Only Version number 800-24445-02 (and higher) of the DS3/EC1-48 card supports errorless side switches. Hitless side switches are supported for Version number 800-24445-01 of the DS3/EC1-48 card in the specified configuration.
Release 6.0.x introduces EC1 functionality for the ONS 15454 DS3/EC1-48 card. The ONS 15454 DS3/EC1-48 card provides 48 Telcordia-compliant, GR-499 DS-3 ports per card. Each port operates at 44.736 Mbps over a single 75-ohm 728A or equivalent coaxial span. Ports can be individually configured for DS3 or EC1 mode. The DS3/EC1-48 card operates as a working or protect card in 1:N protection schemes, where N <= 2. Features offered with the addition of EC1 functionality include:
- Improved DS3/EC1 density for ONS 15454 MSPP to 48 ports per card (documented restrictions apply)
- DS3 Mode 1:N protection (N <= 2), up to 192 ports per shelf
- EC1 Mode 1:N protection (N <= 2), up to 192 ports per shelf
- Errorless XC support
Note Only Version number 800-24445-02 (and higher) of the DS3/EC1-48 card supports errorless side switches. Hitless side switches are supported for Version number 800-24445-01 of the DS3/EC1-48 card in the specified configuration.
- Intermediate path performance monitoring (IPPM)
- Increased B1 error checking on the back plane
- EC1 low density to DS3-EC1-48 high density protection switching support for upgrades
- J0 section trace support for EC1 mode with new TIM-S (Trace Identifier Mismatch – Section) alarm
- Configurable AIS/RDI generation for TIM-S and TIM-P defects
- Configurable AIS generation on facility and terminal loopbacks
As of Release 6.0, with the introduction of the DS1/E1-56 card, you can upgrade low-density DS1-14 or DS1N-14 electrical cards in a 1:N protection scheme (where N = 1 or 2) to high-density DS1/E1-56 electrical cards. Low density to high density upgrades, rules, and restrictions are outlined in the user documentation.
The combination of VCAT, SW-LCAS, and GFP specifies how to process information for data and storage clients. The resulting operations introduce delays. Their impact depends on the type of service being delivered. For example, storage requirements call for very low latency, as opposed to traffic such as e-mail where latency variations are not critical.
With VCAT, SONET paths are grouped to aggregate bandwidth to form VCGs. Because each VCG member can follow a unique physical route through a network, there are differences in propagation delay, and possibly processing delays between members. The overall VCG propagation delay corresponds to that of the slowest member. The VCAT differential delay is the relative arrival time measurement between members of a VCG. The FC_MR-4 card supports VCAT differential delay with the following associated features.
- A maximum of 122 ms of delay difference between the shortest and longest paths
- Diverse fiber routing for VCAT circuits
- All protection schemes (path protection, automatic protection switching [APS], 2-fiber BLSR, 4-fiber BLSR)
- Routing of VCAT group members through different nodes in the SONET network
- Differential delay compensation automatically enabled on VCAT circuits that are diverse (split fiber) routed, and disabled on VCAT circuits that are common fiber routed
As of Release 6.0, filler cards are detectable in CTC node view when installed in the ONS 15454 shelf. The filler card is designed to occupy empty I/O and AIC slots in the Cisco ONS 15454 (Slots 1 - 6, 9, and 12 - 17). The filler card cannot operate in the XC slots (Slots 8 and 10) or TCC slots (7 and 11). When installed, the filler card aids in maintaining proper air flow and electromagnetic interference (EMI) requirements.
Release 6.0.x introduces bridge and roll for the ONS 15454. You can use the bridge and roll feature for maintenance functions such as card or facility replacement, or for load balancing. As of Release 6.0 you can perform bridge and roll operations using CTC or TL1 on all of the following ONS platforms: ONS 15454, ONS 15454 SDH, ONS 15600, ONS 15327, and ONS 15310-CL.
The CTC Bridge and Roll wizard reroutes live traffic without interrupting service. The bridge process takes traffic from a designated “roll from” facility and establishes a cross-connect to the designated “roll to” facility. When the bridged signal at the receiving end point is verified, the roll process creates a new cross-connect to receive the new signal. When the roll completes, the original cross-connects are released.
The CTC Rolls window provides access to information about a rolled circuit before the roll process is complete. To view the Rolls window, click the Circuits > Rolls tabs in either network or node view.
The following TL1 commands specifically support bulk rolls. These commands support line-level rolling/bulk rolling and cannot be used for path-level rolling. For a complete list of TL1 commands supporting bridge and roll, as well as examples for each of the supported features, including bulk roll, consult the user documentation.
This command deletes an attempted rolling operation or completes an attempted rolling operation. The rolls that are created using the ENT-BULKROLL-<OCN_TYPE> command can be deleted using the DLT-BULKROLL-<OCN_TYPE> command.
This command edits information about rolling traffic from one end point to another without interrupting service. This command can use the CMDMDE option to force a valid signal. The only parameter that can be edited is CMDMDE. The time slots cannot be edited.
CTC supports two roll types. In a single roll operation you select only one roll point. This allows you to move either the source or destination of a circuit to a new end-point on the same node (similar to a TL1 single roll), or on a different node (rolling the original circuit onto another circuit).
In a dual roll, you select two roll points. This allows you to reroute a segment between the two roll points of a circuit. The new route for a dual roll can be a new link (no circuit is required), or it can be another circuit (created before or during the bridge and roll process).
CTC allows you to roll the working or protect path regardless of which path is active. You can upgrade an unprotected circuit to a fully protected circuit or downgrade a fully protected circuit to an unprotected circuit with the exception of a path protection circuit. When using bridge and roll on path protection circuits, you can roll the source or destination, or both path selectors in a dual roll, but not a single path selector.
In previous releases the ONS platforms supported SSH version 2 (SSHv2) as an alternative to the ability to telnet into a node (shell access). In Release 6.0.x SSH encrypts all traffic (including passwords) to effectively eliminate unwanted monitoring of node activity. SSHv2 also supports access to the line card shell via shelf controller (that is, via relay), and access to line cards via IOS CLI (for cards in L2/L3 mode).
In previous releases any service type supported by ONS software could access ONS nodes. In Release 6.0.x node access can be controlled by service type. Each service type from which you can access a node in Release 6.0.x is configurable to support a choice of access states. The available states are non-secure (the default), secure (via SSHv2), and disabled (deny access from this service type). The SSHv2 secure state is supported for shell and ftp (using sftp), TL1, and EMS access types. Only nonsecure and disabled modes are supported for SNMP access.
As of Release 6.0 users with Superuser security privileges can configure nodes to use Remote Authentication Dial In User Service (RADIUS) authentication. Cisco Systems uses a strategy known as authentication, authorization, and accounting (AAA) for verifying the identity of, granting access to, and tracking the actions of remote users.
An ONS node operates as a client of RADIUS. The client is responsible for passing user information to designated RADIUS servers, and then acting on the response that is returned. RADIUS servers are responsible for receiving user connection requests, authenticating the user, and returning all configuration information necessary for the client to deliver service to the user. RADIUS servers can act as proxy clients to other kinds of authentication servers. Transactions between the client and RADIUS server are authenticated through the use of a shared secret, which is never sent over the network. User passwords are sent encrypted between the client and RADIUS server. This eliminates the possibility that someone illicitly monitoring an unsecured network might detect a user's password.
An ONS node acting as a RADIUS client can request authentication from up to ten hierarchically arranged RADIUS servers. RADIUS security provisioning features are located in the Provisioning > Security > RADIUS tabs. For further details and operation of RADIUS security features consult the user documentation.
Release 6.0.x RADIUS supports RADIUS session time limits. This feature applies only when a RADIUS server is used for authentication. When RADIUS indicates that a session is to have a time limit, that session is terminated immediately after the time expires. There is no local database support for session time limits. Rather, when EMS users are forcibly logged out by the RADIUS server, they are presented with a notification dialog box indicating that they have been forcibly logged out due to session time expiration. Similarly, when a TL1 user is logged out, an autonomous REPT_EVT_SESSION is sent. After a TL1 user is logged out, the next command the user enters receives a DENY response with a reason code of PLNA (Login Not Active).
In Release 6.0.x RADIUS a Superuser can turn AAA server authentication on or off. When AAA server authentication is turned off, the local security policy and settings are employed for user authentication. When AAA server authentication is enabled, it applies to all NE management services, overriding local settings where the two conflict.
- Idle user timeout (RADIUS user session timeouts are employed instead)
- Single session per user
- Forced password change at first login (global policy)
- Forced password change at next login (individual user)
- Password change prevention
- Excess failed login attempt lockout
- Password reuse prevention
- Inactive account disable
- Password expiration
- Archival of the audit trail in TL1, with a supporting archival failure transient alarm, AUD-ARCHIVE-FAIL
- Audit trail initiation support for IOS-based data cards in the L2/L3 mode (available over the Syslog/IOS CLI)
- Tracking of all Release 6.0.x supported failed login types (incorrect password, disabled account, locked account, single login per user per node denial)
- Shell session login, logout, and activity trail
- Tracking of FTP/sftp logins and logouts
- Sustained audit trail for all logins and logouts whether or not an AAA server is used for user authentication
- Tracking of all user attempts to log in to the node
- When a login is denied, the audit trail records the reason (type of login failure)
- Active Logins
- Data Comm (displayed only for nodes equipped with TCC2P cards)
The Active logins tab supports session management for Release 6.0.x. The Active Logins tab displays current login status information for the network. In previous releases the Active Logins tab displayed only which users were logged in, and the IP address from which each user was logged in. As of Release 6.0, in addition to user names and IP addresses, the Active Logins tab displays the specific node to which the user is logged in, the type of session used to log in, the date and time each user logged in, and the last date/time each user was active during the login. You can refresh the Last Activity Time by clicking the Retrieve Last Activity Time button. You also have the option to log out selected sessions. This feature logs out any selected sessions immediately, and interrupts any activities associated with those sessions. When you log out an active user session you have the option to lock the user out (from future sessions) prior to the logout.
The Policy tab supports user security policy options. The Policy tab provides security policy settings and options. In previous releases the Policy tab provided the following functionality, in five display areas, in which settings could be applied:
- Idle User Timeout—Sets the hours and minutes a user can remain idly logged in before a timeout will occur; settings are provided for each user level.
- User Lockout—Sets the number of times a user can fail an attempt to log in before a lockout will occur, with an option to enforce manual unlocking of the user name by a Superuser, or alternatively, to set the lockout duration in minutes and seconds. Login failure types include:
- Password Change—Sets the number of unique passwords that must be used before a single password can be reused. Sets the option to disable changing of passwords for a fixed, user-configurable number of days. Sets the option to require a password change on first login to a new account.
- Password Aging—Enables you to optionally set a fixed number of days for each user security level (after which time a warning will be issued to create a new password), and to set a fixed number of days after which the password will actually expire and the user will no longer be able to log in.
- Other—Sets the option to enforce a single concurrent session per user (EMS and TL1 only). Also sets the option to enforce disabling of inactive users for users inactive a specified number of days; for example, if this feature is checked, with 90 days selected, a user ID that has not logged in for 90 days or more will be unable to log in again.
With Release 6.0.x, in the “Other” area, enforced single concurrent user session applies to EMS, TL1, telnet, SSH, HTTP, sftp, and ftp, and also, the range of days over which you can enforce disabling of inactive users has increased. The new range is 1 to 99 days.
The Access tab supports node access options, including enhanced SSH secure connection support for Release 6.0.x. The Access tab provides settings and options for each type of access that can be used to reach the node. In previous releases, the Access tab included the following three areas for applying node access settings and options.
- LAN Access—Sets the option of None, Front only, Backplane only, or Front and Backplane. Also includes a “Restore Timeout” setting, configurable in minutes.
- Shell Access—Sets a choice between Telnet, with a configurable port number, and SSH, with a fixed port number.
- Other—Sets the PM clearing privilege as Provisioning or Superuser.
- LAN Access—(Same as in previous releases.) Sets the option of None, Front only, Backplane only, or Front and Backplane. Also includes a “Restore Timeout” setting, configurable in minutes.
- Serial Craft Access—Sets the option to enable or disable the shelf controller serial craft port.
- Shell Access—Sets the Access security state for shell logins as Disable, Nonsecure, or Secure. Sets the configurable Telnet Port. Sets the option to Enable Shell Password.
- EMS Access—Sets the Access security state for EMS logins as Nonsecure or Secure. Sets the TCC Corba IIOP Listener Port.
- TL1 Access—Sets the Access security state for TL1 logins as Disable, Nonsecure, or Secure.
- SNMP Access—Sets the Access security state for SNMP logins as Disable or Nonsecure.
- Other—(Same as in previous releases.) Sets the PM clearing privilege as Provisioning or Superuser.
The RADIUS tab is new for Release 6.0.x, and supports the new RADIUS security features, including RADIUS server management, authentication, accounting, and management of shared secrets. The RADIUS tab provides an area for setting the options to:
- Enable RADIUS Authentication
- Enable RADIUS Accounting
- Enable the given node as the final Authentication when no RADIUS server is reachable
The RADIUS tab also provides a display area for RADIUS servers, in order of authentication preference. This area displays the IP Address, Shared Secret, Authentication Port, and Accounting Port for each RADIUS server.
With Release 6.0.x the ML-Series card includes several security features. Some of these features can operate independent of the ONS node where the ML-Series card is installed. Others are configured using CTC or TL1.
- Cisco IOS login enhancements
- Secure Shell connection
- AAA/RADIUS stand alone mode
- Cisco IOS basic password
There are several ways to access the Cisco IOS running on the ML-Series card, including a direct connection to the console port, which is the RJ-11 serial port on the front of the card. As of Release 6.0, you can increase security by disabling this direct connection, which is enabled by default. This prevents console port input without preventing any console port output, such as Cisco IOS error messages.
The ML-Series card supports the Cisco IOS login enhancements integrated into Cisco IOS Release 12.2(25)S and introduced in Cisco IOS Release 12.3(4)T. The enhancements allow users to better secure the ML-Series card when creating a virtual connection, such as Telnet, Secure Shell (SSH), or HTTP. The secure login feature records successful and failed login attempts for vty sessions on the ML-Series card. These features are configured using the Cisco IOS command-line interface (CLI).
In previous releases the ML-Series card supported SSH version 1 (SSHv1) only. With Release 6.0.x the ML-Series card also supports SSH version 2 (SSHv2). SSHv2 offers security improvements over SSHv1 and is the default choice on the ML-Series card.
SSH has two applications, an SSH server and SSH client. The ML-Series card only supports the SSH server and does not support the SSH client. The SSH server in Cisco IOS software works with publicly and commercially available SSH clients.
The SSH server enables a connection into the ML-Series card, similar to an inbound Telnet connection, but with stronger security. Before SSH, security was limited to the native security in Telnet. SSH improves on this by allowing the use of Cisco IOS software authentication.
The ONS node also supports SSH. When SSH is enabled on the ONS node, the user must use SSH to connect to the ML-Series card for Cisco IOS CLI sessions. Telnet access to the ML-Series card is prevented when SSH is enabled on the ONS node except for connections through the console port of the ML-Series card. Disabling the console port on the ML-Series card will prevent this Telnet access.
RADIUS is a distributed client/server system that secures networks against unauthorized access. Clients send authentication requests to a central RADIUS server, which contains all user authentication and network service access information. The RADIUS host is normally a multiuser system running RADIUS server software from Cisco or another software provider.
The ML-Series card can operate either in RADIUS relay mode or in RADIUS stand alone mode (default). In either mode, the RADIUS messages from the ML-Series card are passed to a RADIUS server that is on the data communications network (DCN) used to manage the ONS node. For more information about RADIUS modes and operation on the ML-Series card consult the user documentation.
As of Release 6.0, IP and OSI can coexist on DCC on a Cisco ONS network, addressing legacy OSI via NSIF Mediation, and allowing migration into IP via G.7712. IP on DCC provides security through strong encryption, SSH, SSL, and HTTPS; centralized control and strong authentication (AAA); RADIUS; communication to Layer 2 and Layer 3 devices (IP + Optical); and pseudo wire, in support of the interworking function between IP and OSI. The ability to address IP/OSI issues gives you flexibility for the future, while working within existing DCN/DCC/OSS infrastructure.
Release 6.0.x uses PPP, a Layer 2 encapsulation protocol, with high-level data link control (HDLC) datagram encapsulation to transport IP and OSI data, and link control protocol (LCP) to establish, configure, and test the point-to-point connections. CTC automatically enables IP over PPP whenever you create an SDCC or LDCC. The SDCC or LDCC can also be provisioned to support OSI over PPP. Link access protocol on the D channel (LAP-D), a data link protocol used in the OSI protocol stack, provides provisionable parameters when you elect to provision an ONS SDCC as OSI only.
OSI routing uses a set of routing protocols that allow end system and intermediate system information collection and distribution; a routing information base; and a routing algorithm (shortest path first).
The ONS 15454 DCC is implemented over the IP protocol, which is not compatible with Ethernet. The system builds Ethernet equipment History and Statistics tables using HDLC statistics that are gathered over the DCC (running point-to-point protocol, or PPP). Release 6.0.x adds RMON DCC monitoring (for both IP and Ethernet) to monitor the health of remote DCC connections.
- cMediaIndependentTable—Standard, rfc3273; the proprietary extension of the HC-RMON MIB used for reporting statistics
- cMediaIndependentHistoryTable—The proprietary MIB used to support history
The FLT SST is an extension to the existing ONS state model. As such, the FLT state is a Telcordia GR-1093 secondary state. It identifies that the affected entity is OOS because it is faulty. The FLT secondary state affects the service state only. The AdminState (the state you manage the entity into) is not affected. The FLT SST is the result of autonomous action; you cannot manage an entity into the FLT SST. The FLT SST is for retrieval purposes only. An entity’s service state will transition into the OOS-AU or OOS-AUMA (AU for autonomous) service state if alarms or conditions are present. The FLT SST is appended to the existing secondary state for the entity when an alarm or condition exists.
In pre-6.0 releases, an IS-NR port with an LOS alarm remains as IS-NR service state. There is no service state change to reflect the port is down. A new PST-PSTQ service state is introduced in Release 6.0.x to reflect a port in MT state that is alarmed, OOS-AUMA (Autonomous, Management).
Any port alarm that results in the AINS countdown being inhibited will result in an FLT SST transition for the port. Loopback alarms will not result in an FLT SST transition, as there is a LPBK state to represent this information. There is NO FLT SST in the DSBLD state, as all alarms are cleared in the DSBLD state.
FLT SST connection changes are the same as for port changes. As with the port, the connection with an alarm in pre-6.0 releases has a service state of IS-NR. A new PST-PSTQ pair is introduced in Release 6.0.x to reflect a cross connect in maintenance with an alarm, OOS-AUMA (Autonomous, Management). Any connection alarm that results in the AINS countdown being inhibited will result in the FLT SST transition for the connection. There is no FLT SST in the DSBLD state, as all alarms are cleared in the DSBLD state.
Release 6.0.x adds pluggable-port module (PPM) management for the 15454_MRC-12 and OC192-XFP cards. For the 15454_MRC-12 card you can provision or delete a PPM, and you can provision or change optical line rates. OC-192XFPs are single-rate PPMs, and therefore can only be deleted.
On the OC192-XFP and 15454_MRC-12 cards, the PPM port is equivalent to an optical port. To change a PPM port's service state you can follow the same procedure as in changing any port's service state (refer to the user documentation for this procedure).
The Cisco Service Assurance Agent (SAA) is an application-aware synthetic operation agent that monitors network performance, especially IP SLAs. Performance can be measured between any Cisco device that supports this feature and any remote IP host (server), Cisco routing device, or mainframe host. Performance measurement statistics provided by this feature can be used for troubleshooting, for problem analysis, and for designing network topologies.
The Cisco SAA can be especially useful for enterprise and service provider networks, because it provides expanded measurement and management capabilities. In particular, the Cisco SAA is a reliable mechanism for accurately monitoring the metrics in SLAs.
Because Cisco SAA is accessible using SNMP, it also can be used in performance monitoring applications for network management systems (NMSs) such as CiscoWorks2000 (CiscoWorks Blue) and the Internetwork Performance Monitor (IPM). SAA notifications also can be enabled through Systems Network Architecture (SNA) network management vector transport (NMVT) for applications such as NetView.
For information on configuring the Cisco SAA to provide advanced network service monitoring information, see the “Network Monitoring Using Cisco Service Assurance Agent” chapter of the Cisco IOS Configuration Fundamentals Configuration Guide, Release 12.2.
As of Release 6.0, the ML-Series card has a complete IP SLA Cisco IOS subsystem and offers all the normal features and functions available in Cisco IOS Release 12.2S. It uses the standard IP SLA Cisco IOS CLI commands. SNMP support is equivalent to the support provided in the IP SLA subsystem 12.2(S), which is the rttMon MIB.
The ML-Series card supports only features in the Cisco IOS 12.2S branch. It does not support functions available in future Cisco IOS versions, such as the IP SLA accuracy feature or the enhanced Cisco IOS CLI support with updated IP SLA nomenclature.
Setting the CoS bits is supported, but set CoS bits are not honored when leaving or entering the CPU when the sender or responder is an ONS 15454, ONS 15454 SDH or ONS 15310-CL platform. Set CoS bits are honored in intermediate ONS nodes.
The system clock on the ML-Series card synchronizes with the clock on the TCC2/TCC2P card. Any NTP server synchronization is done with the TCC2/TCC2P card's clock and not with the ML-Series card's clock.
CTC Launcher provides two connection options. First, it can be used to access ONS NEs that have IP connectivity to the CTC computer. Second, CTC Launcher can establish connectivity to ONS NEs that reside behind a third party, OSI-based GNE. To create a connection through the OSI-based GNE, CTC Launcher creates a TL1 tunnel. This tunnel is similar to the static IP-over-CLNS tunnels that are available in CTC Release 6.0.x. (For information about IP-over-CLNS tunnels, refer to the Release 6.0 ONS product documentation.) However, unlike the static IP-over-CLNS tunnels, the TL1 tunnel does not require provisioning on the third party GNE, the DCN routers, or the ONS NEs. The tunnel connection is created using the CTC Launcher. It can then be managed using CTC.
Prior to using the CTC Launcher utility, the CTC jar files must be precached, either from the installation CD, using the LDCACHE utility, or from the node, by launching CTC from a web browser. For installation instructions for the CTC Launcher utility, consult the readme file. The CtcLauncher.jar utility and the CtcLauncher-README.txt file are located in the CtcLauncher directory on the R6.0.x software CD. For additional information about CTC Launcher, refer to the CTC Launcher Application Guide. To access the application guide:
Step 1 Go to http://www.cisco.com.
TL1 supports the ability to act as a GNE or ENE to an OEM IP DCN (foreign) connected node that also uses TL1. To accomplish TL1 GNE-ENE interoperability, the DCN communication path between the GNE and ENE employs PPP and OSPF in a non-proprietary manner, while ensuring that these connections remain secure. Open GNE TL1 functionality enables you to configure DCC terminations to interoperate with a system on the far end that does not support proprietary PPP vendor extensions or OSPF types.
This command is used to instruct a Gateway NE to delete an entry in the table which maps the TIDs of the subtending NEs to their addresses. The OSs will address the subtending NEs using the TID in TL1 messages and a Gateway NE will address these NEs using IP Addresses or NSAPs. This table, which resides in a Gateway NE, correlates a TID and an address.
This command is used to instruct a Gateway NE to create an entry in the table which maps the TIDs of the subtending NEs to their addresses. The OSs will address the subtending NEs using the TID in TL1 messages and a Gateway NE will address these NEs using IP Addresses or NSAPs. This table, which resides in a Gateway NE, correlates a TID and an address. This command requires that at least one of (IPADDR or NSAP) be specified.
- foreignFarEnd—Input parameter used to indicate that the far end NE on the DCC is a foreign NE.
- foreignIPAddress—Input parameter specifying the IP Address of the far end Node on the DCC. Used only if foreignFarEnd is ‘Y’.
- foreignFarEnd—Output parameter used to indicate that the far end NE on the DCC is a foreign NE.
- foreignIPAddress—Output parameter specifying the IP Address of the far end Node on the DCC. Used only if foreignFarEnd is ‘Y’.
Generate an update after an addition to or deletion from the TADRMAP or an addition or deletion of a firewall or proxy tunnel. The ENT-TADRMAP, DLT-TADRMAP, ENT-TUNNEL-PROXY, DLT-TUNNEL-PROXY, ENT-TUNNEL-FIREWALL, and DLT-TUNNEL-FIREWALL commands each generate an appropriate REPT^DBCHG message.
<aid>,<aidtype>::[<plugtype>],[<pn>],[<hwrev>],[<fwrev>],[<sn>],[<clei>],[<twl1=nwl in code>],[<twl2= wl1 in code>],[<twl3=wl2 in code>],[<twl4=wl3 in code>],[<pluginvendorid>],[<pluginpn>],[<pluginhwrev>],[<pluginfwrev>],[<pluginsn>],[<ilossref>],[<productId>],[<versionId>],[<fpgaVersion>]
<aid>,<aidtype>::[<pn>],[<hwrev>],[<fwrev>],[<sn>],[<clei>],[<twl1=nwl in code>],[<pluginvendorid>],[<pluginpn>],[<pluginhwrev>],[<pluginfwrev>],[<pluginsn>],[<ilossref>],[<productId>],[<versionId>],[<fpgaVersion>]
- Release Notes for the Cisco ONS 15454, Release 6.0
- Release Notes for the Cisco ONS 15454 SDH, Release 6.0.1
- Release Notes for the Cisco ONS 15327, Release 6.0.1
- Release Notes for the Cisco ONS 15600, Release 6.0.1
- Release Notes for the Cisco ONS 15310-CL, Release 6.0.1
- Cisco ONS 15454 Software Upgrade Guide, Release 6.0
- Cisco ONS 15454 Procedure Guide
Provides installation, turn up, test, and maintenance procedures
- Cisco ONS 15454 Reference Manual
Provides technical reference information for SONET/SDH cards, nodes, and networks
- Cisco ONS 15454 DWDM Installation and Operations Guide
Provides technical reference information for DWDM cards, nodes, and networks
- Cisco ONS 15454 Troubleshooting Guide
Provides a list of SONET alarms and troubleshooting procedures, general troubleshooting information, and hardware replacement procedures
- Cisco ONS SONET TL1 Command Guide
Provides a comprehensive list of TL1 commands
For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What’s New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:
Subscribe to the What’s New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.
This document is to be used in conjunction with the documents listed in the “Related Documentation” section.
Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks . Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)
Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.