Table Of Contents
Release Notes for the Cisco ME 3800X, ME 3600X and ME 3600X-24CX Switches, Cisco IOS Release 15.3(1)S and Later Releases
April 30, 2013
These release notes include important information about the following Cisco IOS releases that run on the Cisco ME 3800X, ME 3600X and ME 3600X-24CX switches:
•Cisco IOS Release 15.3(1)S
•Cisco IOS Release 15.3(1)S1
•Cisco IOS Release 15.3(1)S2
These release notes also include the limitations, restrictions, and caveats that apply to these releases.
You can verify that these release notes apply to your switch as follows:
•If you are installing a new switch, see the Cisco IOS release label on the rear panel of your switch.
•If your switch is on, use the show version privileged EXEC command. See the "Finding the Software Version and Feature Set" section.
•If you are upgrading to a new release or a different image, see the software upgrade filename for the software version. See the "Deciding Which Files to Use" section.
For the complete list of Cisco ME 3800X, ME 3600X and ME 3600X-24CX switch documentation, see the "Related Documentation" section.
You can download the switch software from this site (registered Cisco.com users with a login password):
Software Licenses and Features
If you have a service support contract and order a software license or if you order a switch, you receive the universal software image, available in crypto and noncrypto versions. If you do not have a service support contract, such as a SMARTnet contract, download the image from Cisco.com.
The ME 3600X supports these licenses:
•Metro IP access is the universal image.
•Advanced Metro IP access license.
•10 Gigabit Ethernet upgrade license—enables 10 Gigabit Ethernet on the SFP+ uplink ports.
The ME3600X-24CX supports the above licences plus:
•T1/E1 counted license
The ME 3800X supports these licenses plus a scaled license that can be installed with any of these licenses to increase the supported values for that license, for example, more MAC addresses, VLANs, IPv4 routes, and so on.
•Metro Ethernet services is the universal image.
•Metro IP services license.
•Metro Aggregation services license.
•Scaled license for any of the above licenses.
To install a software image, see the "Upgrading the Switch Software" section and the "Working with the Cisco IOS File System, Configuration Files, and Software Images" chapter in the software configuration guide.
To install a software license, see the "Cisco IOS Software Activation Tasks and Commands" chapter in the Cisco IOS Software Activation Configuration Guide:
An emergency evaluation license is embedded in the software image and does not require the installation of a license file. Specify which evaluation license to enable by using the license boot level command.
Enabling evaluation license on an ME 3800X:Switch# configure terminalSwitch(conf)# license boot level <MetroEthServices|MetroIPServices|MetroAggrServices>
Note Only MetroAggrServices is supported during evaluation. Accept the EULA.Switch(conf)# exitSwitch# write memorySwitch# reloadNote: This evaluation license will be validated only after reload.
Enabling evaluation license on an ME 3600X:Switch# configure terminalSwitch(conf)# license boot level <MetroIPAccess|AdvancedMetroIPAccess>
Note Only AdvancedMetroIPAccess is supported during evaluation. Accept the EULA.Switch(conf)# exitSwitch# write memorySwitch# reloadNote: This evaluation license will be validated only after a reload.
After entering the license boot level command, you are prompted to accept the End-User Licensing Agreement (EULA). After accepting the EULA, exiting configuration mode, and saving the running configuration to memory, reload the switch to apply the evaluation license.
Note The evaluation period is valid for 60 days. When the 60 day evaluation period ends, the evaluation license will be unusable after the next reload.
Upon installation of a license file, the license will automatically update to the new license type. There is no need to clear the evaluation license.
Upgrading the Switch Software
Finding the Software Version and Feature Set
The Cisco IOS image is stored as a bin file in a directory that is named with the Cisco IOS release. The image is stored on the system board flash device (flash:).
Note The flash memory can store a maximum of two IOS images or tar files. If you try to copy or archive upgrade beyond the flash memory capacity, the action aborts.
You can use the show version privileged EXEC command to see the software version that is running on your switch. The second line of the display shows the version.
You can also use the dir filesystem: privileged EXEC command to see the directory names of other software images that you might have stored in flash memory.
Deciding Which Files to Use
The software installation procedures in these release notes describe how to perform the upgrade by using a combined tar file. This file contains the Cisco IOS image file. To upgrade the switch through the command-line interface (CLI), use the tar file and the archive download-sw privileged EXEC command.
Installing Software Images and Licenses
The switch is shipped with the latest software image installed. Follow the instructions in this section if you need to reinstall or upgrade the software image.
Before installing your switch software, make sure that you have archived copies of the current Cisco IOS release and the Cisco IOS release to which you are upgrading. You should keep these archived images until you have upgraded all devices in the network to the new Cisco IOS image and until you have verified that the new Cisco IOS image works properly in your network.
Cisco routinely removes old Cisco IOS versions from Cisco.com. See End of Sale and End of Life Products at this URL:
You can copy the software image file on the flash memory to the appropriate TFTP directory on a host by using the copy flash: tftp: privileged EXEC command. You can also configure the switch as a TFTP server to copy files from one switch to another without using an external TFTP server by using the tftp-server global configuration command. For more information about the tftp-server command, see the "Basic File Transfer Services Commands" section of the Cisco IOS Configuration Fundamentals Command Reference at this URL:
This procedure is for copying the combined tar file to the switch. You copy the file to the switch from a TFTP server and extract the files. You can download an image file and replace or keep the current image.
To download software, follow these steps:
Step 1 Use Table 7 to identify the file that you want to download.
Step 2 Locate the software image file:
a. If you are a registered customer, go to this URL and log in.
b. For ME 3800X, navigate to Switches > Service Provider Switches - Ethernet Aggregation.
For ME 3600X, navigate to Switches > Service Provider Switches - Ethernet Access.
c. Navigate to your switch model.
d. Click IOS Software, then select the latest IOS release.
Note When you select a crypto image, you must also accept the terms and conditions of using crypto images.
Step 3 Download the image to a TFTP server and make sure that the server is properly configured.
For more information, refer to Appendix B in the software configuration guide for this release.
Step 4 Log into the switch through the console port or a Telnet session.
Step 5 (Optional) Ensure that you have IP connectivity to the TFTP server by entering this privileged EXEC command:Switch# ping tftp-server-address
For more information about assigning an IP address and default gateway to the switch, refer to the software configuration guide for this release.
Step 6 Download the image file from the TFTP server to the switch by entering this privileged EXEC command:Switch# archive download-sw tftp:[[//location]/directory]/image-name.tar
•For //location, specify the IP address of the TFTP server.
•For /directory/image-name.tar, specify the directory (optional) and the image to download. Directory and image names are case sensitive.
•The /overwrite option overwrites the software image in flash memory with the downloaded one.
•The /reload option reloads the system after downloading the image unless the configuration has been changed and not saved.
This example shows how to download an image from a TFTP server at 192.0.2.1 and to overwrite the image on the switch:Switch# archive download-sw /overwrite tftp://192.0.2.1/image-name.tar
You can also download the image file from the TFTP server to the switch and keep the current image by using the /leave-old-sw option instead of the /overwrite option.
Note There can be only two image directories in flash memory.
The installation process extracts the tar file with all the files and the IOS image, and sets the BOOT directory to the created directory in flash memory. The process takes approximately 5 to 10 minutes, and at some stages might appear to have stopped.
Step 7 The switch is configured to boot automatically, but you can enter the show boot privileged EXEC command to verify the boot path list and see if a manual boot is necessary.Switch# show bootBOOT path-list :flash:/me380x-universal-mz.153-1.S/me380x-universal-mz.153-1.S.binConfig file : flash:/config.textPrivate Config file : flash:/private-config.textManual Boot : noHELPER path-list :
Step 8 Save the configuration and reload the switch.Switch# reload
After the installation, the switch is running the universal image. Follow these steps to install a purchased license with increased capabilities. To purchase a license, contact Cisco.
Step 1 Copy the license file to flash or TFTP.
Step 2 Enter the command to install the license:Switch# license install flash:LICENSE_FILENAMEorSwitch# license install tftp://location/LICENSE_FILENAME
Step 3 Enter these commands to boot from the new license:Switch# config tSwitch(config)# license boot level license_name
Step 4 If you have a a scaled license, install the scaled licenseSwitch# license install flash:SCALED_LICENSE_FILENAMEorSwitch# license install tftp://location/SCALED_LICENSE_FILENAME
Note To revert to a non-scaled license, enter the license clear scaled_license_name privileged EXEC command.
Step 5 Reload the switch for new license to take effect.Switch# reload
You can assign IP information to your switch by using these methods:
•The CLI-based setup program, as described in the switch hardware installation guide.
•The DHCP-based autoconfiguration, as described in the switch software configuration guide.
•Manually assigning an IP address, as described in the switch software configuration guide.
New Software Features
The following sections provide information on new software features:
Cisco IOS Release15.3(1)S
The following are the new software features introduced in Cisco IOS Release 15.3(1)S.
ITU-T G.8032 Ethernet Ring Protection Switching—This feature implements protection switching mechanisms for Ethernet layer ring topologies. The feature uses the G.8032 Ethernet Ring Protection (ERP) protocol, defined in ITU-T G.8032, to provide protection for Ethernet traffic in a ring topology, while ensuring that no loops are within the ring at the Ethernet layer. For details about this feature see:
Switch Port Analyzer (SPAN)—This feature allows monitoring of switch traffic on a port or VLAN using a network analyzer or RMON probe. For details about using this feature, see:
IEEE 802.1x - VLAN Assignment—An 802.1x client switch can, once authenticated, receive its VLAN assignment from a RADIUS server. For details about using this feature, see:
IEEE 802.1x - Authenticator—IEEE 802.1x is a client-server-based access control and authentication protocol that restricts unauthorized devices from connecting to a LAN through publicly accessible ports. For details about using this feature, see:
Cisco ME3600 24CX: HDLC Support on T1/E1 IM—This feature provides HDLC Support on T1/E1 interfaces. For details about using this feature, see:
Egress default queue limit improvement and percent bandwidth support—QoS feature to increase QoS Buffer depths and default queue limits on the Cisco ME 3800X/ME 3600X. The feature allows setting queue limits as a percentage of the total buffer pool. For details about using this feature, see:
E2E Transparent Clocking—This feature supports E2E Transparent Clocking on the Cisco ME 3600X-24CX. For details about using this feature, see:
Match Input Interface and VLAN—Support for QoS groups to be configured at multiple level in the egress hierarchy. Prior to this only the PHB level was allowed to be configured with QoS groups. For details about using this feature, see:
Enhanced Object Tracking—This feature provides a more complete alternative to the Hot Standby Routing Protocol (HSRP) tracking mechanism, which allows you to track the line-protocol state of an interface. For details about using this feature, see:
Ethernet Data Plane Loopback—This feature, when enabled, helps to monitor the Data Plane connectivity between two interfaces. For details about using this feature, see:
LACP 1-1 Redundancy with Fast Switchover—LACP 1-1 redundancy provides an enhancement over the current LACP implementation to support fast failover without link flapping under 1-1 active/hot standby configuration. For details about using this feature, see:
Max Bundle/LACP Hot Standby-—This feature supports LACP Max Bundle and LACP Active Standby. For details about this feature, see:
VPLS over MPLS SVI uplink, EVC Xconnect with MPLS SVI uplink (Switchport or EVC), SVI L3VPN over SVI uplink - MPLS IP on SVI Support—This feature supports the qualification of SVI as an MPLS uplink. For details about using this feature, see:
EVC Push Rewrite—This feature supports Rewrite Ingress Push 1 on the Cisco ME 3600X/ME 3800X switches. For details about using this feature, see:
MPLS-TP MIB—This feature provides support for the MPLS-TP MIB. For details about this feature, see:
IPSLA Y1731 SLM Feature Enhancement—This feature provides support for concurrent and on demand ETH-SLM operations on the Cisco ME 3600X/ME 3800X switches. For details about using this feature, see:
L2VPN Protocol Based CLI—Adds support for the new protocol based CLI for L2VPN to platforms. This feature unifies the Nexus and IOS CLIs for L2VPN technology. Note that for the time being, we will still honor the old CLI and will follow the standard Cisco/IOS CLI migration model. For details about using this feature, see:
Cisco ME 3600X-24CX I/O Mode 3—Three I/O modes are available on the switch. For more information about the modes, see:
Link Path Through—This feature enables a local EoMPLS PE router to detect a failure in the path between the remote PE and CE routers. The local PE router propagates the failure to the local CE router such that it brings down the pseudowire connection and can more quickly reestablish the connection when the remote CE-PE connection is restored. This feature is enabled automatically and does not introduce any new CLI commands.
•This feature is applied only to EoMPLS connections under `EVC Default' on the Cisco ME 3600X/ME 3800X platform.
•When EoMPLS under EVC default with link path through feature is configured on an interface and if the port is in Remote Link Down state, then if another EVC is configured on the interface, the Link is removed from the Remote Link Down state and does not handle any further Remote Link Down events.
•This feature is not symmetrical if the remote PE does not support EoMPLS remote Ethernet port shutdown and the local PE does support it. This can potentially happen if the remote PE is running an older version of the image or is another platform which does not support this feature while local PE is running an image which supports this feature.
Cisco IOS Release15.3(1)S1
This release contains no new features.
Cisco IOS Release15.3(1)S2
This release contains no new features.
•Layer 2 Protocol (L2PT) can forward LinkOAM, ESMC, ELMI, and other reserved MAC addresses in the IEEE range of 0180C2000000-0F.
–Pause frames that use 0180C2000001 cannot be L2PT forwarded or dropped because they are consumed by the forwarding ASIC's physical registers without sending them to the CPU.
–Dot1x that uses 0180c2000003 is disabled by the Cisco ME 3800 and ME 3600 switches. This functionality is the same as in previous releases.
–L2PT tunneling for the reserved MACs is not supported since the reserved MACs do not have known link types. Reserved MACs tunneled with 0180C200000B are replaced to ensure packets egress.
–The LinkOAM, ELMI, and ESMC protocols are considered to be "L2PT peer" even if the L2PT CLI is not applied on the interface. Unlike other protocols, L2PT code assumes it to be drop. This is done to avoid L2PT peer configuration for LinkOAM, ELMI, and ESMC since these protocols previously worked without L2PT configurations.
•Downgrading to Cisco IOS 15.2(2)S from I/O Mode 3 is not supported. Ensure you are in I/O Mode 2 or I/O Mode 1.
The following sections provide information about open caveats:
Open Caveats in Cisco Release 15.3(1)S
On the Cisco ME3600X-24CX, the Entity MIB is not responding for the T1/E1 controller ports.
Conditions: When you walk entitymib OID for the entPhysicalEntry, no T1/E1 ports details are returned.
Buffer manger lockup occurs on the Cisco ME 3600X-24FS-M when two ports on the Cisco ME 3600X-24FS-M (GI0/13,14) are configured as Xconnects to two ports on the Cisco ASR 9000.
Conditions: None, as this is a hardware failure (QDR parity error).
On the Loopback interface used for BGP neighbor establishment, deleting the ip pim sparse-mode and adding back the ip pim sparse-mode results in tracebacks. Memory leaks are also observed.
Conditions: The Cisco ME 3600X is running Cisco IOS Release 15.2(4)S. Multicast stream can be received on any type of interface (L2/L3).
Platform assert failures and tracebacks are observed upon modifying EFP to a different EVC BD configuration.
Conditions: Observed only when the EFP is changed to a different EVC BD configuration.
Open Caveats in Cisco Release 15.3(1)S1
Broadcast traffic flows over Standby Spoke VC and then gets punted.
Conditions: The traffic comes over the Core VCs (as they are up) and then flows over the Standby Spoke VC from Hub to Spoke. In the Spoke, the traffic received from the Spoke VC gets punted to the CPU (Software Forwarded).
There is a drop in static pseudowires over mpls-tp traffic.
Conditions: By default, static pseudowires are configured in vc_type4 mode. Since vc_type4 was not configured correctly, there was a drop in traffic.
Workaround: This behavior can be changed by setting interworking in pw-class as Ethernet, as follows:pseudowire-class static-pw-interworkingencapsulation mplsinterworking ethernet
Removing channel group configuration on a CEM controller causes device to hang in a particular scenario.
Conditions: This issue occurs with the following steps:
1. Configure CEM group (CESoPSN or SAToP) on a controller.
2. Configure channel group on this controller with same timeslots used in (1) for CEM group.
3. Remove channel group configured in (2).
Workaround: Soft or hard reboot the device.
CPU errors are seen with (*, G/M) entries with ACL.
Conditions: This issue is seen on ME 3600X-24CX boxes in mode 3.
Workaround: Operate the box in mode 2.
When doing archive download to upgrade or downgrade a software version, old image present in the board is not getting deleted or displayed.
Conditions: This issue occurs during "archive download."
Workaround: No specific condition.
ARP does not pass for Tunneled VLANs.
Conditions: IP ARP inspection is enabled on a switch where dot1q tunnel is configured.
Workaround: Remove ARP inspection.
Executing "no ip icmp redirect" globally does not result in ICMP redirects to stop.
Conditions: None.This command is not functioning as expected.
Ping failure occurs upon path switchover from EVC to routed PW.
Conditions: When MAC move occurs from EVC to routed PW, ping fails
Workaround: Clear MAC address table.
ICMP replies getting duplicated on ME3600 switch.
Conditions: Create service instances on port channel interfaces on ME3600 in a topology shown below:
Open Caveats in Cisco Release 15.3(1)S2
An additional 4 bytes are added into the calculation of the MTU. Packets are punted to the CPU even if the size of the packet is under the configured MTU.
Conditions: Observed on the Cisco ME 3600X, with the MPLS label swap situation.
Workaround: Set the MTU to 4 bytes or more.
Broadcast traffic flows over the standby spoke VC and then gets punted.
Conditions: Traffic comes over the core VCs and flows over the standby spoke VC from hub to spoke. In the spoke, the traffic received from the spoke VC gets punted to the CPU (software forwarded).
On the loopback interface used for BGP neighbor establishment, deleting the ip pim sparse-mode and adding back ip pim sparse-mode results in tracebacks and memory leaks.
Conditions: Observed with the Cisco ME 3600X, where a multicast stream can be received on any type of interface (L2/L3).
DWDM SFP+ are supported, but when inserted, the switch does not recognize the DWDM.
Conditions: When a DWDM SFP+ is present on the switch.
Removing channel group configuration on a CEM controller causes device to hang in a particular scenario.
Conditions: This issue occurs with the following steps:
1. Configure CEM group (CESoPSN or SAToP) on a controller.
2. Configure channel group on this controller with same timeslots used in (1) for CEM group.
3. Remove channel group configured in (2).
Workaround: Soft or hard reboot the device.
Include VPLS VC ID information in the mac flap notification messages.
Conditions: VPLS VC information is missing in mac-flap messages.
Unexpectedly huge counter values observed on gig 0/1 interface and port-channel soon after creating any port-channel.
Conditions: Create a port-channel using gig 0/1.
MPLS PW ping fails.
Conditions: Observed during the upgrade from 3.7.2 to 3.8.1.
Tracebacks related to CPU hogs on reload. Also observed on shut/no shut of interfaces.
Conditions: Creating a large number of EFPs (1k or more) on a single interface leads to the CPU hog.
Executing the no ip icmp redirect command globally does not result in stopping ICMP redirects.
Router crash on configuring VLAN first and reconfiguring the policy-map.
Conditions: Observed when the QoS policy-map applied on the switchport interface is reconfigured or modified after the addition of a VLAN globally.
Workaround: Configure the VLAN and wait until the CPU is normal, then modify the policy-map.
The new policy-map configuration does not take effect. Traffic is still marking as per the old configuration.
Conditions: Observed when dynamically confirm action configuration is deleted from the policer configuration.
Workaround: Remove the service-policy from the interface/service instance and add it back.
LDP flaps observed.
Conditions: Packet drops observed in platform counters.
Trust port configuration will be invalid on DHCP snooping over EVC. the DHCP discover request cannot be snooped correctly and will be dropped on EVC in L2 flat environments.
Conditions: Observed when configuring in new interface regarding BD of trust port, and when reloading after saving configuration.
PMIPv6 control traffic is process switched on by the MPLS PE router. Some PMIPv6 control traffic is being dropped.
Conditions: Switch configured as MPLS PE is transiting PMIPv6 traffic.
Multicast traffic stops being forwarded when a Mrouter (SVI) VLAN is shut, and the incoming and outgoing interface are on the same VLAN.
Conditions: IGMP snooping has to be enabled, SVI has to be acting as an Mrouter, and when this Mrouter is shut, traffic should still flow because L2 connectivity is up. But an outage is observed.
Workaround: Perform an IGMP snooping enable, then disable.
A system crash occurs on the Cisco ME 3600X switch and error messages appear.
Conditions: Observed after changing the route-map on the route-reflecter that establishes the switch. The Cisco ME 3600X is a route-reflecter-client. The route-map setting that you change on the route-reflecter is the output route-map for the other route-reflecter-client, not for the Cisco ME 3600X.
CLI command to get PHY info without interface option is being rejected.
Conditions: Observed when the PHY info CLI command is entered without an interface option.
Workaround: Specify the interface option in order to get the PHY information.
The Cisco ME 3600X tags packets on the native vlan of a .1Q trunk if the packets have been routed. Local generated packets will go untagged, and packets that have only been switched through the Cisco ME 3600X will go untagged. But if the packet enters the Cisco ME 3600X on another VLAN and is routed to the destination VLAN, it will be tagged when leaving on a .1Q trunk.
CPU utilization stuck at 100 percent.
Conditions: Observed upon a periodic shut and no shut of the 10 GigE interface.
Workaround: Power cycle the switch.
When changing the policer PIR on a system with high TCAM usage, the CPU spikes and the configuration change can take several minutes.
Conditions: Observed in cases of high TCAM usage.
When an ACL with the range command is used for QoS, tracebacks are observed.
Conditions: Observed when the policy-map is applied to the interface. The specified range is 1024 to 65535.
Workaround: Apply the same ACL, but modify the range to 1024 to 65534.
When a Y1731 is active on flexlink uplink ports, no measurements are done when the active flexlink port is down and the standby takes over as active.
Conditions: Observed when UP MEP is configured, flexlink is configured on uplink ports, and Y1731 SLM is active on flexlink.
OSPF/LDP packets are not punted to the CPU despite having IP enabled on the VLAN.
Conditions: VLAN up trigger to multicast has to be missed. This is a very rare case, but could happen in an environment where VLAN up and down is common.
Workaround: Perform a shut/no shut on the VLAN.
ARP resolution fails with DAI enabled.
Conditions: Observed after enabling DAI on another VLAN.
Workaround: Enable the DAI on the VLAN of interest.
Frame loss observed when configuring an existing class-map to a new service instance. The frame loss is observed on the existing service instance.
Conditions: Observed if the class-map has the same value as the SET value (such as SET DSCP and SET QOS group).
After reloading the Cisco ME 3600X, part of the configuration presented below disappears, causing part of the network to not function until those commands are re-added to configuration:
Before reload:ME-3600X#sh running-config | b bridge-domainbridge-domain 1001member GigabitEthernet0/1 service-instance 1001member GigabitEthernet0/2 service-instance 1001interface GigabitEthernet0/1switchport trunk allowed vlan noneswitchport mode trunkservice instance 1001 ethernetinterface GigabitEthernet0/2switchport trunk allowed vlan noneswitchport mode trunkservice instance 1001 ethernet
After restart:Bridge-domain 1001 createdVLAN 1001 does not exist, creating vlanmember GigabitEthernet0/1 service-instance 1001^% Invalid input detected at '^' marker.member GigabitEthernet0/2 service-instance 1001^% Invalid input detected at '^' marker.ME-3600X#sh running-config | b bridge-domainbridge-domain 1001interface GigabitEthernet0/1switchport trunk allowed vlan noneswitchport mode trunkservice instance 1001 ethernetinterface GigabitEthernet0/2switchport trunk allowed vlan noneswitchport mode trunkservice instance 1001 ethernet
Conditions: Observed upon reload.
After TCAM has been exhausted, even after TCAM resources have been removed, a service policy cannot be applied. The TCAM clean up is not functioning properly.
Conditions: Observed on the Cisco ME 3600X after exhausting the TCAM.
Workaround: Reload the switch.
Ping fails beyond the connected PE devices.
Conditions: Observed only when the dot1q tag that is matched under EFP is different from the configured bridge domain for the same service instance.
Workaround: Ensure that the bridge domain, service instance, and dot1q tag are the same, then the ping should work fine beyond the connected PE devices.
When changing a QoS policy for classification, such as altering a class-map or changing an associated ACL, while the policy is attached to an interface, the classification stops working and remarks traffic in a strange way.
Conditions: Observed when changes are made to the match statement on the class map or in the access-list.
Workaround: Remove the policy from the interface and reattach it.
When sending broadcast traffic via a span destination port, the span destination port forwards the traffic, and other ports of the Cisco ME 3800X receive it.
Traffic is not switching to the protect path.
Conditions: With MPLS TP in the core, traffic is not switching to the protect path upon changing the outlink number.
Traffic is not switching to protect path.
Conditions: With MPLS TP in the core, traffic is not switching to protect path upon bringing down the active path with the interface shut at the mid point.
On the Cisco ME 3600X or ME 3800X, it takes 3.5 seconds for traffic to converge on the SVI when preemption is forced back to the active flexlink port.
Conditions: Observed when flexlink is configured in non-VLB mode and preemption mode is configured as forced.
TE FRR protected link failure convergence is more than 50 msecs.
Conditions: Remove end failure of the protected link.
Workaround: Use BFD aware TE FRR and carrier delay on the protected link, which will improve the convergence.
The following section provides information about resolved caveats:
Resolved Caveats in Cisco Release 15.3(1)S1
Polling the BRIDGE-MIB for VLAN data other than VLAN 1 times out on 3600X and 3800X switches
Conditions: This issue occurs with any 3600X or 3800X switch because SNMP contexts for each VLAN are not created.
This enhancement is filed to track the addition of support for this functionality.
DHCP snooping binding is not established on EVC BD trusted port.
Conditions: When DHCP snooping is enabled on one or more VLANs and EVC BD is configured on trusted port connected towards SP network/DHCP server, client does not receive IP address, and DHCP snooping binding is not established.
Workaround: None. Only switchport can be configured as trusted port.
Confirm and Exceed action counters in the show policy-map interface are not getting cleared with scale configurations on doing clear counters.
Conditions: This issue occurs when doing clear counters.
Workaround: Remove the policy-map and add it back.
When an ACL with more than 1K ACEs is applied, the ACL does not come into effect and any error is not thrown too.
Conditions: This issue occurs when applying an ACL with greater than 1024 ACEs. The ACL does not get applied and TCAM write does not happen. This is expected as limit on number of ACEs is exceeded. However, no error message is shown on console that it has failed.
Workaround: No workaround. ACEs should not exceed 1K.
Traffic burst differences from 10G.
Conditions: Traffic burst from 10G connected to ASIC1 is twice compared to asic0.
Traceback is seen on creating TE tunnel with 6PE/6VPE configuration. No functionality impact.
Conditions: Configure 6PE/6VPE, create TE tunnel with auto-route announce
Multicast traffic may not be forwarded correctly when traffic is received on a layer 2 port-channel.
Conditions: This issue occurs with pair or ME switches with layer 2 port-channel in between and with layer 2 access port on the non DR PIM neighbor.
Workaround: Create a dummy portchannel1 (poch1) and start using from portchannel2 until portchannel26. Do not use the dummy portchannel1.
1pps configuration is rejected while changing router roles from master to slave or slave to master with 1pps config.
Conditions: Configs - 'input 1pps 0/0' on master and 'output 1pps 0/0' on slave are not deleted when PTP is unconfigured.
Workaround: Need to unconfig 'input 1pps 0/0'or 'output 1pps 0/0' before unconfiguring PTP.
Traceback is seen at adjmgr_free_met.
Conditions: On defaulting an attachment interface having L2PT configured and used for VPLS traceback is seen.
In a 1:1 (one active and one standby) scenario, when the hot standby converges to active, the port-channel does not come down, but the REP is re-converging. The fast-switch over happens in nearly 1 second.
Conditions: 1:1 (one active and one standby) scenario where the hot standby converges to active.
10m reference to SETS goes to OOR on connecting 1pps input.
Conditions: Connect both 10m and 1pps inputs.
Workaround: Have only 10m connected. The SETS goes to locked state without any issue. 1pps input does not work with this defect.
EoMPLS link stays down, although VC is up.
Conditions: This issue is seen when changing encapsulation fro default to dot1q and vice versa
Incorrect MAC learning is observed over pseudowires that are part of HVPLS, causing a traffic failure.
Conditions: This symptom is observed when VPLS auto discovery is in use with MPLS over SVI in the core. This issue is also seen with LDP-based VPLS when split horizon-enabled pseudowires are configured after the non-split horizon-enabled pseudowires.
After defaulting the port-ch and applying back the configurations on it, eth serv instances are down.
Workaround: shut and no shut on the port-ch brings the EFPs up, Or, configure the port channel command by command instead of copy pasting the configurations
VPLS Interworking Type is shown as incorrect.
Conditions: It is shown correctly on show mpls l2 vc binding output.
It is shown incorrectly on show mpls l2 vc detail output.
Workaround: Issue clear mpls ldp neighbour' after issuing interworking vlan.'
IS-IS over HDLC serial link is not up.
Conditions: Configure a serial interface and assign an IP address to it. Configure IS-IS Routing Protocol over a serial interface
The Cisco ME 3800X crashinfo files may be corrupted.
Conditions: A crashinfo file is created when there is a crash.
Workaround: Gather console logs and syslogs to help troubleshoot crashes.
The Cisco ME 3600X/ME 3800X may crash when running the following command: show platform qos policer cpu x x.
Conditions: Observed only when run through an SSH session and with AAA configured.
Workaround: Run the commands through telnet or console.
The Cisco ME 3600X/ME 3800X fails to trigger a watchdog crash in certain scenarios.
Conditions: Soaking over a prolonged period of time.
Xconnect fails to negotiate to the correct vc-type on reload.
Conditions: This symptom is seen in vc-type4 session.
Workaround: Clear Xconnect peer.
Memory leaks observed. The PI front-end pseudoport is not deleted when the Xconnect is removed, which causes the memory leak. It is because PD returns BDOMAIN_PP_FAILED to PI when pp_engine_context is a NULL pointer.
Conditions: Flapping the interface, keeping the setup idle, and executing CLI clear Xconnect all results in memory leaks.
EVC ingress counter becomes zero after delete/add "ethernet service" configure.
Conditions: This symptom is seen while EVC QinQ use topology.
Workaround: Issue shut/no shut port-channel interface.
Ping fails over a routed PW setup.
Conditions: SVI-based MPLS uplink.
Workaround: Disable MAC learning.
With scale EVC Xconnect configuration and same policy-map applied on all the EVCs, deleting and adding user-defined class-map results in assert messages.
Conditions: Add and delete user-defined class-map.
Workaround: Remove the policy-map and make the dynamic modification on the policy-map. Or, there has to be delay in the removal and addition of the class-map.
Traceback observed after executing "archive download" command is executed in ME 3600X-24CX.
The ConPE node crashes intermittently after soaking it with events.
Conditions: Rigorous flapping of the core.
Workaround: Stabilize the core network.
SAToP/CESoPSN traffic has no priority in MPLS core.
Conditions: CEM pseudowire traffic has EXP = 0 in the MPLS core which gives no priority. There is no service-policy support to mark exp as well.
Non-ip packets are accounted in class-map having "match ip any any" in the access-list
Conditions: When an ip qos acl match is applied, even non-ip packets like arp etc. also get classified into that class.
Traffic is not blocked if a new level is configured after the existing level is still violated.
Conditions: Change the existing level (for example, 15%) to a new level (for example, 20%).
This issue occurs if ME3800X and 7600 are working as PE devices and if they have multiple core connections between them.
If one of the core interface between ME3800X and 7600 and the attachment circuit (AC) is bounced simultaneously on ME3800X, the VPLS status on ME3800X shows 'up' but it shows 'down' on 7600.
Conditions: There should be multiple connection between core devices.
Workaround: Bounce attachment circuit on 7600 to resolve the issue
Error messages similar to the following: "npm_intfman_get_el3idc_vlan_index:interface el3id handle is NULL" are observed on the console.
Conditions: Observed upon performing the following commands:no mpls traffic-eng tunnelsmpls traffic-eng tunnelsclear ip bgp *
Or, upon performing IM OIR on the peer end.
Traceback appears in console::39:23.127: %IPV6_ROUTING-3-RIB: ipv6_is_addr_ours called for link-local address with wrong tableid -Process= "NCEF ADJ Refresh bg process", ipl= 0, pid= 84-Traceback= 6FAF20z 10C1A44z BA391Cz 2AF5C04z 2BFFC6Cz 2C566CCz 2C519B8z
Conditions: This issue occurs when enabling IPv6.
Workaround: None. Does not have functional impact.
On executing "sh inv" command when SFP-10G-LR SFP-10G-SR present in a Cisco ME 3600/ME 3800 box, the Description is missing.
Conditions: SFP-10G-LR SFP-10G-SR should be present in 10G ports.
The following DWDM SFPs do not work on a GE or 10GE port on ME3600:
The same SPF works on a ME3400. When insert one of the DWDM SFPs above into a GE or 10GE port on ME3600 or ME3800, the switch logs the following error messages:%PHY-4-SFP_NOT_SUPPORTED: The SFP in Gi0/3 is not supported%PM-4-ERR_DISABLE: gbic-invalid error detected on Gi0/3, putting Gi0/3 in err-disable state
Conditions: This issue applies to ME3600 and ME3800. The problem is exists in 15.2(4)S1.
ME3600X: Unsupported L4 type in QoS ACL can be applied to a port.
IGMP snooping pruning port even if report arrives as a reply to the GSQ. (GSQ is sent when a leave comes on a port.)
1. IGMP general-query (GQ) comes during the time when snooping last-member-query (GSQ) timer is on.
2. GQ timer expires before the GSQ timer.
3. A report comes before the GQ timer expires.
4. No reports are received after the GQ timer expires.
For the issue to be seen, all the above four conditions have to be true.
Traffic with wrong tag is sent on dynamically modifying the rewrite tag.
Conditions: On dynamically changing the tag to be pushed, device sends traffic with previously configured tag.
Workaround: Remove the service instance and reconfigure with new rewrite tag to be pushed.
Conditions: Exception is seen when an unsupported SFP with invalid EEPROM content is inserted and replaced with a supported SFP when the interface is in error-disabled state.
Workaround: Use a supported SFP.
Tracebacks seen @adjmgr_l3_delete_nh.
Conditions: This issue occurs when configuring VFI Xconnect and enabling PIM under SVI. Traceback is seen on removing ip address under SVI.
Unsupported SFP does not get recognized on ME 3800X, ME 3600X, and ME 3600X-24CX.
Conditions: This issue occurs when eeprom is not correctly programmed according to SFF8472 standard.
To enable PTP, reload the box and set the variable ENABLE_PTP_CPU to 1 in the switch prompt.
Workaround: Always set ROMMON variable ENABLE_PTP_CPU to 1.
End to end L3 traffic is affected if the host queue (cpu queue 2) increments continuously at high rates (2000 packets/s and above).
Conditions: End to end L3 traffic is affected if the host queue (cpu queue 2) increments continuously at high rates (2000 packets/s and above).
CoS inner value gets changed on marking with CoS in egress on QinQ service instance without rewrite.
Conditions: QinQ service instance without rewrite operation.
PTP session is stuck in HOLDOVER after PTP unconfig/config on master.
Conditions: Need to unconfig/config PTP on master.
The MAC flaps in the network happen on the reload of the device.
Conditions: The MAC flaps occur because multicast bpdus are being sent back into the VPLS core after they reach the destination. This behavior causes mac flap on every device that are on the path through which the BPDU traverses.
Workaround: The workaround to the above issue is to apply split horizon at the bridge-domain where the MAC flaps happen.
Packets stopped looping back on dynamically attaching service-policy when loopback session is active.
Conditions: It is seen only on attaching policy-map after starting the loopback session.
Conform and exceed counters are taking more time to get updated properly.
Conditions: The issue is seen in presence of ELB session with QoS enabled.
QoS Configuration failed error occurs even when the policy with shaping/bw/priority is attached to output direction.
Conditions: This issue is seen only when the policy is attached with loopback session active.
Workaround: Attach the policy before starting the loopback session.
ip sla does not show any statistics, and raw db is also not populated.
Conditions: When core interface is a switch port trunk, this issue occurs.
PTP slave is not able to start session with master.
Conditions: PTP session not started if slave's and master's loopback IP addresses are in same subnet.
–Master loopback address: <ipaddress>
–Slave loopback address: <ipaddress>
Workaround: Configure slave's and master's loopback IP addresses in different subnets.
User-defined classes in the policy-map applied on EVC with rewrite push is not supported. This configuration gets accepted on an in certain conditions.
Conditions: This happens when the QoS policy is applied first to the EFP, and then the bridge domain configuration is applied.
QoS memory chunk leaks are observed on certain scenarios of ELB QoS.
Conditions: This issue is observed on defaulting the interface applied with QoS policy, flapping the interface, and stopping the loopback session
Linkoam does not work without the l2protocol peer configuration on an untagged EVC.
Conditions: This is a regression caused by CSCud63960 commit for the linkoam flow.
Resolved Caveats in Cisco Release 15.3(1)S2
Policy-based routing stops working after the switch reloads.
Conditions: Observed when multiple next-hops configured on the same route map are reachable through the same interface.
Workaround: Remove and reconfigure the route-map.
On the Cisco ME 3600X, when mac security is configured on an EFP port, the traffic received on this EFP and destined to one mac addressed learned on the same EFP will be bounced back to the EFP.
Conditions: Traffic is NOT bounced back in the following conditions:
–Mac security is removed
–A split-horizon group is configured on the EFP
–The EFP is replaced by a legacy L2 trunk
When the port-channel is deleted and created again, the max MTU can not be set up.
Conditions: Delete the port-channel and re-create it.
Workaround: Reload the device.
Packet loss is observed over pseudowire and high CPU.
Conditions: Observed when IPv6 site-local multicast MAC traffic is sent over SVI EoMPLS. The traffic is looped between the PE of the EoMPLS.
CPU errors observed with (*, G/M) entries on the ACL.
Conditions: Observed on Cisco ME 3600X switches operating in Mode 3 or Mode 4.
Workaround: Operate the Cisco ME 3600X switch in Mode 2.
Traffic from routed VPLS does not trigger ARP.
Conditions: Observed in a routed VPLS network that has multiple CE routers connected to the PE router. The issue occurs when a local CE router is connected to the PE router via an EVC and when a ping is sent from a local CE router to the remote CE router.
Workaround: Ping the first interface VLAN of the EVC to resolve the ARP.
The Cisco ME 3600/3800X switches may reload when a BGP session flaps.
Conditions: Observed only if there is more than one BGP neighbor configured on the switch.
Classification does not work properly.
Conditions: Observed only if there are classes based on ACL match and normal DSCP match. Only the ACL class will classify properly, and other classes do not work.
Ingress classification based on a numbered IP ACL does not work correctly.
Conditions: If an ingress QoS policy contains a match based on a numbered ACL, classification does not work and the actions do not take effect.
Workaround: Use a named ACL instead of a numbered ACL for the match.
A stall is received in the ETSEC driver. The ping drops on controller interface Gi0.
Workaround: Perform a shut/no shut on the Gi0 interface.
While attempting to upload the image using the command archive upload-sw, the system was unable to create the temp directory. ramfs:update occurred, and the image failed to upload.
Workaround: Use copy flash: tftp: instead.
These documents provide complete information about the switch and are available from these Cisco.com sites:
ME 3600X and ME 3600X-24CX switch:
Note Before installing, configuring, or upgrading the switch, see these documents:
•For initial configuration information, see the "Configuring the Switch with the CLI-Based Setup Program" appendix in the hardware installation guide.
•For upgrading information, see the "Downloading Software" section in the release notes.
•Cisco ME 3800X and ME 3600X Switch Software Configuration Guide
•Cisco ME 3800X and ME 3600X Switch Command Reference
•Cisco ME 3800X and ME 3600X System Message Guide
•Cisco ME 3800X and ME 3600X Switch Hardware Installation Guide
•Cisco ME 3800X and ME 3600X Switch Getting Started Guide
•Installation Notes for the Cisco ME 3800X and ME 3600X Switch Power-Supply and Fan Modules
•Regulatory Compliance and Safety Information for the Cisco ME 3800X and ME 3600X Switches
•Cisco ME 3600X-24CX Switch Hardware Installation Guide
•Cisco ME 3600X-24CX Switch Getting Started Guide
•Installation Notes for the Cisco ME 3600X-24CX Switch Power-Supply and Fan Modules
•Regulatory Compliance and Safety Information for the Cisco ME 3600X-24CX Switch
•Cisco Small Form-Factor Pluggable Modules Installation Notes
•Cisco 10-Gigabit XFP Transceiver Modules Install Note
•Cisco CWDM GBIC and CWDM SFP Installation Notes
These compatibility matrix documents are available from this Cisco.com site:
•Cisco Gigabit Ethernet Transceiver Modules Compatibility Matrix
•Cisco 100-Megabit Ethernet SFP Modules Compatibility Matrix
•Cisco CWDM SFP Transceiver Compatibility Matrix
•Cisco Small Form-Factor Pluggable Modules Compatibility Matrix
•10-Gigabit Ethernet Transceiver Modules Compatibility Matrix
•Compatibility Matrix for 1000BASE-T Small Form-Factor Pluggable Modules
Obtaining Documentation, Obtaining Support, and Security Guidelines
For information on obtaining documentation, obtaining support, providing documentation feedback, security guidelines, and also recommended aliases and general Cisco documents, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:
This document is to be used in conjunction with the documents listed in the "Related Documentation" section.
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