Table Of Contents
Circuit Emulation Services (CES) Overview
Network Timing Services Overview
Configure the ATM-CES Port Adapter for OC3
Configure the ATM-CES Port Adapter for DS3
Configure the ATM-CES Port Adapter for E3
Configure the ATM-CES Port Adapter for Circuit Emulation Services
Configure Unstructured (Clear Channel) CES Services
Configure Structured (N x 64) CES Services
Configure Channel-Associated Signaling (for Structured CES Services Only)
Configure Network Clock Source and Priorities
Troubleshoot the ATM-CES Port Adapter
Monitor and Maintain the ATM-CES Port Adapter
PA-A2 ATM-CES Port Adapter
Description
The ATM-CES port adapters (PA-A2-4T1C-OC3SM, PA-A2-4T1C-T3ATM, PA-A2-4E1XC- OC3SM, PA-A2-4E1XC-E3ATM, PA-A2-4E1YC-OC3SM, and PA-A2-4E1YC-E3ATM) are available on Cisco 7200 series routers. The ATM-CES has four T1 (1.544 Mbps) or four E1 (2.048 Mbps) ports (75- or 120-ohm) that can support both structured (N x 64 kbps) and unstructured ATM Forum-compliant circuit emulation services (CES), and one port that supports an OC-3 (155 Mbps) single-mode intermediate reach interface or a T3 (45 Mbps) or E3 (34 Mbps) standards-based ATM interface. The target application of the ATM-CES port adapter is access to a broadband public or private ATM network where multiservice consolidation of voice, video, and data traffic over a single ATM link is a requirement.
The ATM-CES port adapter supports the following features:
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Cross-connect Circuit Emulation Services (CES)—structured and unstructured
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Platforms
This feature is supported on the Cisco 7200 series routers.
Configuration Tasks
For information on how to configure the ATM-CES interfaces, refer to the "Configuring ATM" chapter of the Wide-Area Networking Configuration Guide and the "Configuring Interfaces" chapter of the Configuration Fundamentals Configuration Guide. All ATM and interface commands might not be applicable to the ATM-CES interface. If a command is not available, the router displays the message "Command not supported on this interface."
In addition to the commands in the "Configuring ATM" chapter, you can configure the four T1 or E1 interfaces as a CBR interface to convert CBR traffic into ATM cells for transport across an ATM network. You can also configure the the OC3 or DS3 or E3 interface.
Perform the tasks in the following sections to configure the interfaces on the ATM-CES port adapter. The first five tasks are required. Depending on the type interface on the ATM-CES port adapter, perform only one of the first three tasks.
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For information on other commands that can be used by the ATM-CES port adapter such as LAN emulation and bridging, refer to the Cisco IOS Release 11.1 configuration guides.
For ATM-CES configuration examples, see "Configuration Examples" later in this section.
Circuit Emulation Services (CES) Overview
Voice and video services (circuit emulation) allow you to interconnect existing T1 or E1 interfaces and other kinds of constant bit rate (CBR) equipment. CBR services include such features as PBX interconnect, consolidated voice and data traffic, and video conferencing.
With circuit emulation, data received from an external device at the edge of an ATM network is converted to ATM cells, sent through the network, reassembled into a bit stream, and passed out of the ATM network to its destination. T1/E1 circuit emulation does not interpret the contents of the data stream. All the bits flowing into the input edge port of the ATM network are reproduced at one corresponding output edge port.
An emulated circuit is carried across the ATM network on a PVC, which is configured through the network management system.
The ATM-CES port adapter offers two types of services:
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CES Service Overview
CES-IWF is a service based on ATM Forum standards that allows communications to occur between CBR and ATM UNI interfaces, that is, between non-ATM telephony devices (such as classic PBXs or TDMs) and ATM devices (such as Cisco 7200 series routers). Thus, a Cisco 7200 series router equipped with an ATM-CES port adapter offers a migration path from classic T1/E1 CBR data communications services to emulated CES T1/E1 unstructured (clear channel) services or structured (N x 64) services in an ATM network.
shows a simplified representation of CES-IWF functions in an ATM network.
Figure 2 Typical CES-IWF Operations in an ATM Network
The ATM-CES port adapter offers the following circuit emulation services:
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For information on configuring CES services, refer to "Configure the ATM-CES Port Adapter for Circuit Emulation Services" later in this section.
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Network Timing Services Overview
CES-IWF and CBR traffic relate to a quality of service (QOS) classification defined by the ATM Forum for Class A (AAL1) traffic in ATM networks. In general, Class A traffic pertains to voice and video transmissions.
In an ATM networking environment, CBR refers to a particular class of traffic that is generated by edge (source) devices and propagated into ATM networks for transmission to other edge (destination) devices in the network.
The ATM-CES port adapter has been designed specifically to handle CBR traffic in an ATM networking environment. To provide requisite timing functions in support of CES operations, you can specify any one of three clocking modes:
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However, to support synchronous clocking or SRTS clocking in your ATM networking environment, your network must incorporate the following facilities:
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For information on configuring timing services, refer to "Configure Network Clock Source and Priorities" later in this section.
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Configure the ATM-CES Port Adapter for OC3
For information on how to configure the OC3 interface on the ATM-CES port adapter, refer to the "Configuring ATM" chapter of the Wide-Area Networking Configuration Guide and the "Configuring Interfaces" chapter of the Configuration Fundamentals Configuration Guide. All ATM and interface commands might not be applicable to the ATM-CES interface. If a command is not available, the router displays the message "Command not supported on this interface."
For information on other commands that can be used by the ATM-CES port adapter such as LAN emulation and bridging, refer to the Cisco IOS Release 11.1 configuration guides.
Configure the ATM-CES Port Adapter for DS3
The ATM-CES port adapter can contain a DS3 (45 Mbps) standards-based ATM interface. You must configure at least one permanent virtual circuit (PVC) or switched virtual circuit (SVC) on the DS3 port. The virtual circuit options you use must match in three places: on the router, on the ATM switch, and at the remote end of the PVC or SVC connection.
To configure the DS3 port on the ATM-CES port adapter, perform the following tasks beginning in global configuration mode:
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interface atm slot/0
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ip address ip-address mask
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atm lbo {long | short}
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no atm clock internal
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atm ds3-scramble
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atm framing {cbitadm | cbitplcp | m23adm | m23plcp}
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atm pvc vcd vpi vci aal-encap [peak average burst] [oam seconds]
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map-group name
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no shutdown
1 For more information on creating PVCs, refer to the "Configure PVCs on the Cisco 700 Family" section in the "Configuring ATM" chapter of the Wide-Area Networking Configuration Guide.
2 For information on creating map groups, refer to the "Configuring ATM" chapter of the Wide-Area Networking Configuration Guide.
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For additional commands that can be used with the DS3 port, refer to the "Configuring ATM" chapter of the Wide-Area Networking Configuration Guide and the "Configuring Interfaces" chapter of the Configuration Fundamentals Configuration Guide. All ATM and interface commands might not be applicable to the ATM-CES interface. If a command is not available, the router displays the message "Command not supported on this interface."
For information on other commands that can be used by the ATM-CES port adapter such as LAN emulation and bridging, refer to the Cisco IOS Release 11.1 configuration guides.
Configure the ATM-CES Port Adapter for E3
The ATM-CES port adapter can contain a E3 (34 Mbps) standards-based ATM interface. You must configure at least one permanent virtual circuit (PVC) or switched virtual circuit (SVC) on the E3 port. The virtual circuit options you use must match in three places: on the router, on the ATM switch, and at the remote end of the PVC or SVC connection.
To configure the E3 port on the ATM-CES port adapter, perform the following tasks beginning in global configuration mode:
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interface atm slot/0
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ip address ip-address mask
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no atm clock internal
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no atm e3-scramble
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atm framing [g832adm | g751adm | g751plcp]
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atm pvc vcd vpi vci aal-encap [peak average burst] [oam seconds]
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map-group name
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no shutdown
1 For more information on creating PVCs, refer to the "Configure PVCs on the Cisco 700 Family" section in the "Configuring ATM" chapter of the Wide-Area Networking Configuration Guide.
2 For information on creating map groups, refer to the "Configuring ATM" chapter of the Wide-Area Networking Configuration Guide.
Note
For additional commands that can be used with the DS3 port, refer to the "Configuring ATM" chapter of the Wide-Area Networking Configuration Guide and the "Configuring Interfaces" chapter of the Configuration Fundamentals Configuration Guide. All ATM and interface commands might not be applicable to the ATM-CES interface. If a command is not available, the router displays the message "Command not supported on this interface."
For information on other commands that can be used by the ATM-CES port adapter such as LAN emulation and bridging, refer to the Cisco IOS Release 11.1 configuration guides.
Configure the ATM-CES Port Adapter for Circuit Emulation Services
After you create the ATM interface, you can perform the tasks in the following sections to configure the T1/E1 interfaces on the ATM-CES port adapter. The T1/E1 interface is called a constant bit rate (CBR) port and supports circuit emulation services (CES):
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Configure Unstructured (Clear Channel) CES Services
A circuit that you set up on a CBR port for unstructured service is always identified as "circuit 0," because only one such circuit can be established on any given CBR port. Such a circuit consumes the entire bandwidth of the port, which is provisioned manually at the time you set up the unstructured circuit and remains dedicated to that port, whether that port is actively transmitting CBR data or not.
A CES module converts CBR traffic into ATM cells for propagation through an ATM network. The ATM cell stream is directed to an outgoing ATM port or CBR port. If the outgoing port is an ATM port on the same Cisco 7200 series router, the PVC is called a "hard PVC." As a general rule when setting up a hard PVC, you must interconnect a CBR port and the ATM port in the same ATM-CES port adapter. Only hard PVCs are supported in the Cisco 7200 series router.
To configure the T1/E1 port on the ATM-CES port adapter for unstructured (clear channel) CES services, perform the following tasks beginning in global configuration mode:
For additional command that can be used with the CBR port, refer to the "Configuring ATM" chapter of the Wide-Area Networking Configuration Guide and the "Configuring Interfaces" chapter of the Configuration Fundamentals Configuration Guide. All ATM and interface commands might not be applicable to the ATM-CES interface. If a command is not available, the router displays the message "Command not supported on this interface."
For information on other commands that can be used by the ATM-CES port adapter such as LAN emulation and bridging, refer to the Cisco IOS Release 11.1 configuration guides.
Configure Structured (N x 64) CES Services
Structured (N x 64 kbps) CES services differ from unstructured CES services in that the structured services allow you to allocate the bandwidth in a highly flexible and efficient manner. With the structured services, you use only the bandwidth actually required to support the active structured circuit(s) that you configure.
For example, in configuring an ATM-CES port adapter for structured service, you can define multiple hard PVCs for any given ATM-CES port adapter's T1/E1 port. The ATM-CES port adapter provides up to 24 time slots per T1 port and up to 31 time slots per E1 for defining structured CES circuits. To see the bandwidth that is required on an ATM link for this particular circuit, use the show ces circuit command.
Note
For simplicity in demonstrating configuration tasks for structured CES services, the procedures in this section are directed primarily at setting up a single CES circuit per T1/E1 port. However, these procedures outline the essential steps and command syntax that you would use if you were to set up multiple CES circuits on a T1/E1 port.
Structured CES services require network clock synchronization by means of the synchronous clocking mode. You must select the clock source and define its priority locally for each Cisco 7200 series router in your network. You do this by means of the network-clock-select command.
To configure the T1/E1 port on the ATM-CES port adapter for structured (N x 64 kbps) CES services without CAS, perform the following tasks beginning in global configuration mode:
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For additional command that can be used with the CBR port, refer to the "Configuring ATM" chapter of the Wide-Area Networking Configuration Guide and the "Configuring Interfaces" chapter of the Configuration Fundamentals Configuration Guide. All ATM and interface commands might not be applicable to the ATM-CES interface. If a command is not available, the router displays the message "Command not supported on this interface."
For information on other commands that can be used by the ATM-CES port adapter such as LAN emulation and bridging, refer to the Cisco IOS Release 11.1 configuration guides.
Configure Channel-Associated Signaling (for Structured CES Services Only)
Because the ATM-CES port adapter emulates constant bit rate services over ATM networks, it must be capable of providing support for handling channel-associated signaling (CAS) information introduced into structured CES circuits by PBXs and time-division multiplexing (TDM) devices. The ces circuit cas interface command provides this feature.
With respect to the CAS information carried in a CBR bit stream, an ATM-CES port adapter can be configured to operate as follows:
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In this case, the ATM-CES port adapter does not sense the CAS information (carried as so-called "ABCD" bits in the CBR bit stream) and provides no support for CAS functions.
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In this case, in addition to packaging incoming CBR data into ATM AAL1 cells in the usual manner for transport through the network, the ATM-CES port adapter in the ingress node senses the ABCD bit patterns in the incoming data, incorporates these patterns in the ATM cell stream, and propagates the cells to the next node in the network. The ATM cells are transported across the network from link to link until the egress node is reached.
At the egress node, the ATM-CES port adapter strips off the ABCD bit patterns carried by the ATM cells, reassembles the CAS ABCD bits and the user's CBR data into original form, and passes the frames out of the ATM network in the proper DS0 time slot.
All these processes occur transparently without user intervention.
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In this case, the CAS and on-hook detection features work together to enable an ingress node in an ATM network to monitor on-hook and off-hook conditions for a specified 1 x 64 structured CES circuit. As implied by the notation "1 x 64," the on-hook detection (or bandwidth-release) feature is supported only in a structured CES circuit that involves a single time slot at each end of the connection.
The time slot configured for the structured CES circuit at the ingress node (time slot 2) can be different from the DS0 time slot configured at the egress node (time slot 4). Only one such time slot can be configured at each end of the circuit when the on-hook detection feature is used.
When you invoke this feature, the ingress ATM-CES port adapter monitors the ABCD bits in the incoming CBR bit stream to detect on-hook and off-hook conditions in the circuit. In an "off-hook" condition, all the bandwidth provisioned for the specified CES circuit is used for transporting ATM AAL1 cells across the network from the ingress node to the egress node.
In an on-hook condition, the network periodically sends dummy ATM cells from the ingress node to the egress node to maintain the connection. However, these dummy cells consume only a fraction of the circuit's reserved bandwidth, leaving the rest of the bandwidth available for use by other network traffic. This bandwidth-release feature enables the network to make more efficient use of its resources.
When the CAS feature is enabled for a CES circuit, the bandwidth of the DS0 channel is limited to 56 kbps for user data, because CAS functions consume 8 kbps of channel bandwidth for transporting the ABCD signaling bits. These signaling bits are passed transparently from the ingress node to the egress node as part of the ATM AAL1 cell stream.
In summary, when the optional CAS and on-hook detection features are enabled, the following conditions apply:
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To configure the T1/E1 port on the ATM-CES port adapter for channel associated signaling, first perform the tasks in the "Configure Structured (N x 64) CES Services" section and then perform the following tasks beginning in global configuration mode:
Configure Network Clock Source and Priorities
You can specify up to four network clock sources for a Cisco 7200 series router. The highest priority active port in the chassis supplies primary reference source to all other chassis interfaces that require network clock synchronization services. The fifth network clock source is always the local oscillator on the ATM-CES port adapter.
To direct a CBR port to use the network-derived clock, you must configure the CBR port with the ces dsx1 clock source network-derived interface command. For information on configuring the CRB port, refer to "Configure the ATM-CES Port Adapter for Circuit Emulation Services" earlier in the section.
To establish the sources and priorities of the requisite clocking signals for an ATM-CES port adapter in a Cisco 7200 series router, perform the following tasks beginning in global configuration mode:
To verify the clock signal sources and priorities that you established in the previous procedure for your ATM-CES port adapter, use the show network-clocks privileged EXEC command.
Troubleshoot the ATM-CES Port Adapter
To set the following loopbacks to troubleshoot the ATM-CES port adapter using Cisco IOS software, perform the first task beginning in global configuration mode followed by any of the other tasks depending on your needs:
These loopback commands loop all packets from the ATM interface back to the interface and also direct the packets to the network.
Monitor and Maintain the ATM-CES Port Adapter
After configuring the new interface, you can display its status. You can also display the current state of the ATM-CES port adapter and connected virtual circuits. To show current virtual circuits and traffic information, perform the following tasks in EXEC mode:
For information on other show commands that can be used with the ATM-CES port adapter, refer to the "Configuring ATM" chapter of the Wide-Area Networking Configuration Guide and the "Configuring Interfaces" chapter of the Configuration Fundamentals Configuration Guide.
Configuration Examples
This section provides several examples of configuring the ATM-CES port adapter. For additional examples, refer to the "Configuring ATM" chapter of the Wide-Area Networking Configuration Guide and the PA-A2 ATM-CES Port Adapter Installation and Configuration publication.
The following example shows how to configure the DS3 port on the ATM-CES port adapter. In this example, the ATM interface is configured for cbitplcp framing and aal5snap encapsulation.
router(config)# interface atm 6/0router(config-if)# ip address 1.1.1.1 255.255.255.0router(config-if)# atm lbo shortrouter(config-if)# atm clock internalrouter(config-if)# no atm ds3-scramblerouter(config-if)# atm framing cbitplcprouter(config-if)# atm pvc 55 255 128 aal5snaprouter(config-if)# map-group sanjoserouter(config-if)# no shutdownrouter(config-if)# exitrouter(config)# exitThe following example shows how to configure the T1 port on the ATM-CES port adapter for unstructured (clear channel) CES services. In this example, the T1 port uses adaptive clocking and the circuit name "CBR-PVC-A."
router(config)# interface cbr 6/0router(config-if)# ces aal1 service unstructuredrouter(config-if)# ces aal1 clock adaptiverouter(config-if)# atm clock internalrouter(config-if)# ces dsx1 clock network-derivedrouter(config-if)# ces circuit 0 circuit-name CBR-PVC-Arouter(config-if)# ces pvc 0 interface atm 6/0 vpi 0 vci 512router(config-if)# no shutdownrouter(config-if)# no ces circuit 0 shutdownrouter(config-if)# exitrouter(config)# exitThe following example shows how to establish the the T1 port on the ATM-CES port adapter as the first clocking priority and the ATM port as the second clocking priority.
router(config)# network-clock-select 1 cbr 6/0router(config)# network-clock-select 2 atm 6/0router(config)# exitThe following example shows a sample output from the show network-clocks command. This example shows the clock sources created and the current clock source. Under normal operating conditions, the priority 1 clock source is assumed to be the active source.
router# show network-clocksPriority 1 clock source: CBR 6/0 upPriority 2 clock source: ATM 6/0 upPriority 3 clock source: not configuredPriority 4 clock source: not configuredPriority 5 clock source: Local oscillatorCurrent clock source:CBR, priority:1Command Reference
This section documents new or modified commands. All other commands used with this feature are documented in the Cisco IOS Release 11.1 command references.
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atm ds3-scramble
To enable scrambling of the ATM cell payload for the DS-3 PLIM on an ATM interface, use the atm ds3-scramble interface configuration command. To disable scrambling of the ATM cell payload for the DS-3 PLIM, use the no form of this command.
atm ds3-scramble
no atm ds3-scrambleSyntax Description
This command has no keywords and arguments.
Default
DS3 scrambling is disabled.
Command Mode
Interface configuration
Usage Guidelines
This command was modified in Cisco IOS Release 11.1 CA to change the command syntax from ds3 scramble to atm ds3-scramble.
D3 scrambling is used to assist clock recovery on the receiving end.
Example
The following example disables DS3 scrambling on the interface:
interface atm 4/0no atm ds3-scrambleatm e3-scramble
To enable scrambling of the ATM cell payload for the E3 PLIM on an ATM interface, use the atm e3-scramble interface configuration command. To disable scrambling of the ATM cell payload for the E3 PLIM, use the no form of this command.
atm e3-scramble
no atm e3-scrambleSyntax Description
This command has no keywords and arguments.
Default
E3 scrambling is enabled.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA.
E3 scrambling is used to assist clock recovery on the receiving end.
Example
The following example disables E3 scrambling on the interface:
interface atm 2/0no atm e3-scrambleatm framing (DS3)
To specify DS3 line framing on an ATM interface, use the atm framing interface configuration command. To return to the default C-bit with Physical Layer Convergence Protocol (PLCP) framing, use the no form of this command.
atm framing [cbitadm | cbitplcp | m23adm | m23plcp]
no atm framing [cbitadm | cbitplcp | m23adm | m23plcp]Syntax Description
Default
cbitplcp
Command Mode
Interface configuration
Usage Guidelines
This command was modified in Cisco IOS Release 11.1 CA to include Cisco 7200 series routers with the ATM-CES port adapter.
This command is available only on Cisco 4500 and Cisco 4700 routers with DS3 access speeds, and on Cisco 7200 series routers with the ATM-CES port adapter. This command is not available on the Cisco 7000 series or Cisco 7500 series.
Framing on the interface must match that on the switch for this ATM link.
Example
The following example specifies M23 ADM framing on a router that has been set up with DS3 access to an ATM network:
interface atm 4/0atm framing m32admatm framing (E3)
To specify E3 line framing, use the atm framing interface configuration command. To return to the default G.751 Physical Layer Convergence Protocol (PLCP) framing, use the no form of this command.
atm framing [g832adm | g751adm | g751plcp]
no atm framing [g832adm | g751adm | g751plcp]Syntax Description
g832adm
(Optional) Specifies G.832 ATM direct mapping.
g751adm
(Optional) Specifies G.751 ATM direct mapping.
g751plcp
(Optional) Specifies G.751 PLCP encapsulation. This is the default.
Default
The default framing is g751plcp.
Command Mode
Interface configuration
Usage Guidelines
This command was modified in Cisco IOS Release 11.1 CA to include the g751plcp keyword and to include information on the Cisco 7200 series routers with the ATM-CES port adapter.
The default framing is described in the ITU-T Recommendation G.751.
Note
Framing on the interface must match that on the switch for this ATM link.
Example
The following example specifies G.832 ADM framing on a router that has been set up with E3 access to an ATM network:
interface atm 4/0atm framing g832admatm lbo
To specify the cable length (line build-out) for the ATM interface, use the atm lbo interface configuration command. To return to the default, use the no form of this command.
atm lbo {long | short}
no atm lboSyntax Description
long
Specifies a cable length greater than 50 feet.
short
Specifies a cable length of less than 50 feet. This is the default.
Default
short
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA.
Example
The following example specifies that the ATM interface use a cable less than 50 feet:
interface atm 4/0atm lbo shortRelated Command
ces aal1 clock
To configure the AAL1 timing recovery clock for the CBR interface, use the ces aal1 clock interface configuration command. To return the clock to the default, use the no form of this command.
ces aal1 clock {adaptive | srts | synchronous}
no ces aal1 clockSyntax Description
Default
synchronous
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
The clock mode must be synchronous for structured mode. In unstructured mode, use adaptive when a network-derived clock is not available.
Use srts when a network-derived clock is available but devices attached to the CES port use a different clock reference. The srts keyword samples the incoming clock, subtracts from the network clock, and sends the remainder in an AAL1 header. The clock is reconstructed during output by adding the residual to the network reference.
Use synchronous for all other modes.
Example
The following command sets the AAL1 timing recovery clock to adaptive mode.
interface cbr 4/0ces aal1 clock adaptiveRelated Commands
ces aal1 service
ces dsx1 clock source
network-clock-selectces aal1 service
To configure the type of circuit emulation service used on the CBR interface, use the ces aal1 service interface configuration command.
ces aal1 service {structured | unstructured}
Syntax Description
structured
Sets the type of service to structured (cross-connect).
unstructured
Sets the type of service to unstructured (clear-channel).
Default
unstructured
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
The structured keyword means that each time slot is an independent entity grouped into circuits, where each circuit has an independent PVC.
The unstructured keyword reduces the incoming serial data on the receiving end of the ATM network. The keyword also sets the service to single circuit, single PVC, where all time slots are carried.
Example
The following example changes the mode for the ces aal1 service command to structured.
interface cbr 4/0ces aal1 service structuredRelated Commands
ces aal1 clock
ces circuit
ces dsx1 clock source
ces dsx1 framing
ces dsx1 lbo
ces dsx1 linecode
ces dsx1 loopback
ces dsx1 signalmode robbedbit
ces pvc
show ces circuit
show ces circuit
show ces interface cbr
show ces status
show interface cbrces circuit
To configure the connection attributes for the CBR interface, use the ces circuit interface command. To return the connection attributes to the default or to enable the circuit, use the no form of this command.
ces circuit circuit-number [cas] [cdv range] [circuit-name name] [on-hook-detection
hex-number] [partial-fill range] [shutdown] [timeslots range]
no ces circuit circuit-number [cas] [cdv range] [circuit-name name] [on-hook-detection
hex-number] [partial-fill range] [shutdown] [timeslots range]Syntax Description
Default
No circuit is configured.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
For unstructured service, the circuit number is 0. For T1 structured service, the circuit number is 1 through 24. For E1 structured service, the time slots are 1 through 31.
Channel-associated signaling (CAS) provides information about the time slot (on or off the hook) and is updated once per multiframe.
With both the CAS and on-hook detection features enabled, these features work together to enable an ingress node in an ATM network to monitor on-hook and off-hook conditions for a specified 1 x 64 structured CES circuit. As implied by the notation "1 x 64," the on-hook detection (or bandwidth-release) feature is supported only in a structured CES circuit that involves a single time slot at each end of the connection.
The time slot configured for the structured CES circuit at the ingress node (time slot 2) can be different from the DS0 time slot configured at the egress node (time slot 4). Only one such time slot can be configured at each end of the circuit when the on-hook detection feature is used.
When you invoke the on-hook feature, the ingress ATM-CES port adapter monitors the ABCD bits in the incoming CBR bit stream to detect on-hook and off-hook conditions in the circuit. In an "off-hook" condition, all the bandwidth provisioned for the specified CES circuit is used for transporting ATM AAL1 cells across the network from the ingress node to the egress node.
In an on-hook condition, the network periodically sends dummy ATM cells from the ingress node to the egress node to maintain the connection. However, these dummy cells consume only a fraction of the circuit's reserved bandwidth, leaving the rest of the bandwidth available for use by other network traffic. This bandwidth-release feature enables the network to make more efficient use of its resources.
When the CAS feature is enabled for a CES circuit, the bandwidth of the DS0 channel is limited to 56 kbps for user data, because CAS functions consume 8 kbps of channel bandwidth for transporting the ABCD signaling bits. These signaling bits are passed transparently from the ingress node to the egress node as part of the ATM AAL1 cell stream.
In summary, when the optional CAS and on-hook detection features are enabled, the following conditions apply:
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Example
The following example sets the structured service CDV range to 5000 milliseconds and enables the interface.
interface cbr 4/0ces circuit 3 cdv 5000ces circuit 3 no shutdownRelated Commands
ces aal1 service
show ces circuit
show ces circuit
show ces interface cbr
show ces status
show interface cbrces dsx1 clock source
To configure a transmit clock source for the CBR interface, use the ces dsx1 clock source interface configuration command. To return the clock source to the default, use the no form of this command.
ces dsx1 clock source {loop-timed | network-derived}
no ces dsx1 clock sourceSyntax Description
loop-timed
Configures the transmit clock to loop (RX-clock to TX-clock).
network-derived
Configures the transmit clock to be derived from the network.
Default
network-derived
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
Use the command to configure the transmit clock source to the ATM-CES port adapter.
Example
The following example sets the clock source to loop-timed.
interface cbr 4/0ces dsx1 clock source loop-timedRelated Commands
ces aal1 clock
ces aal1 service
network-clock-select
show ces circuit
show ces interface cbr
show interface cbrces dsx1 framing
To select the frame type for the data line on the CBR interface, use the ces dsx1 framing interface configuration command. To return the frame type to the default, use the no form of this command.
ces dsx1 framing {esf | sf} (for T1)
ces dsx1 framing {e1_crc_mfCASlt | e1_crc_mf_lt | e1_lt | e1_mfCAS_lt} (for E1)
no ces dsx1 framingSyntax Description
Default
esf (for T1)
e1_lt (for E1)
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
Use this command in configurations where the router communicates with the data line. The service provider determines which framing type is required for your circuit.
Example
The following example sets the data line type to super frame.
interface cbr 4/0ces dsx1 framing sfRelated Commands
ces aal1 service
show ces circuit
show ces interface cbr
show ces status
show interface cbrces dsx1 lbo
To configure cable length for the CBR interface, use the ces dsx1 lbo interface configuration command. To return the cable length to the default, use the no form of this command.
ces dsx1 lbo length
no ces dsx1 lboSyntax Description
length
Sets the cable length. Values are (in feet): 0_110, 110_200, 220_330, 330_440, 440_550, 550_660, 660_above, and square_pulse. The default is 0_110 feet.
Default
0_110 feet
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
Set the cable length to the desired number of feet on your system.
Example
The following example sets the cable length to 440 feet:
interface cbr 4/0ces dsx1 lbo 440_550Related Commands
atm lbo
ces aal1 service
show ces circuit
show ces interface cbr
show ces status
show interface cbrces dsx1 linecode
To select the linecode type for the CBR interface, use the ces dsx1 linecode interface configuration command. To return the linecode to the default, use the no form of this command.
ces dsx1 linecode {ami | b8zs} (for T1)
ces dsx1 linecode {ami | hdb3} (for E1)
no ces dsx1 linecodeSyntax Description
Default
b8zs (for T1)
hdb3 (for E1)Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
Use this command in configurations where the switch communicates with the data line. The service provider determines which linecode type is required for your circuit.
Example
The following example specifies B8ZS as the linecode type:
interface cbr 4/0ces dsx1 linecode b8zsRelated Commands
ces aal1 service
show ces circuit
show ces interface cbr
show ces status
show interface cbrces dsx1 loopback
To enable a loopback for the CBR interface, use the ces dsx1 loopback interface configuration command. To disable the loopback, use the no form of this command.
ces dsx1 loopback {line | noloop | payload}
no ces dsx1 loopback {line | noloop | payload}Syntax Description
Default
No loopback is set.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
This command is useful when testing the circuit emulation port adapter module.
Example
The following example sets a payload loopback:
interface cbr 4/0ces dsx1 loopback payloadRelated Commands
ces aal1 service
loopback
show ces circuit
show ces interface cbr
show ces status
show interface cbrces dsx1 signalmode robbedbit
To enable the signal mode as robbed bit on a CBR interface, use the ces dsx1 signalmode robbedbit interface configuration command. To return the signal mode to the default, use the no form of this command.
ces dsx1 signalmode robbedbit
no ces dsx1 signalmode robbedbitSyntax Description
This command has no keywords or arguments.
Default
No signal mode is enabled.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
A T1 frame consists of 24 time slots (DS0) that send at a rate of 64 kbps. T1 defines the ability to send signaling in-band on individual time slots by removing the low bit of each byte for signaling in robbedbit mode. This procedure allows 8 kbps for signaling and leaves 56 kbps for data.
In structured mode, you can send the T1 signaling information across the network. This means that after you enable robbedbit signaling mode on the port, and enable CAS on individual circuits that need this type of service, you are robbing bits from the DS0. The system then puts the bits in the specified format to be sent across the network and reinserts them at the passive side on the CES-IWF connection.
Example
The following example enables channel associated signaling and robbed bit signaling:
interface cbr 4/0ces circuit 1 casces dsx1 signalmode robbedbitRelated Commands
ces aal1 service
ces circuit
show ces circuit
show ces interface cbr
show ces status
show interface cbrces pvc
To configure the destination port for the circuit on the CBR interface, use the ces pvc interface configuration command. To remove the destination port on the circuit, use the no form of this command.
ces pvc circuit-number {interface atm slot/port vci number vpi number}
no ces pvc circuit-number {interface atm slot/port vci number vpi number}Syntax Description
Default
No destination port is configured.
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
Use the interface option to create a hard PVC. Use the dest-atm-addr option to create a soft PVC. Soft PVCs are not supported on Cisco 7200 series routers.
You must configure both sides of the CES circuits because at the source (the active side in CES-IWF), the time slots are not recognized at the destination (the passive side).
Each CES circuit has an ATM address. When configuring the source PVC, you need the destination ATM address.
Examples
The following example shows setting a hard PVC. In this example, the destination of ATM port 0 in slot 1 is assigned to circuit 31 on CBR port 0 in slot 1.
interface cbr 1/0ces pvc 31 interface atm 1/0 vpi 0 vci 512Related Commands
ces aal1 service
show ces circuit
show ces circuit
show ces interface cbr
show ces status
show interface cbrinterface cbr
To specify the T1 or E1 constant bit rate interface on an ATM-CES port adapter, and enter interface configuration mode, use the interface cbr global configuration command.
interface cbr slot/port
Syntax Description
Default
None
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
The ATM-CES port adapter has four T1 (1.544 Mbps) or four E1 (2.048 Mbps) ports (75- or 120-ohm) that can support both structured (N x 64 kbps) and unstructured ATM Forum-compliant circuit emulation services (CES), and one port that supports an OC-3 (155 Mbps) single-mode intermediate reach interface or a T3 (45 Mbps) or E3 (34 Mbps) standards-based ATM interface.
Example
The following example specifies the first T1 or E1 port on the ATM-CES port adapter in slot 1:
interface cbr 1/0Related Commands
show ces interface cbr
show interface cbrloopback
To place the ATM interface into loopback mode, use the following form of the loopback interface configuration command. To remove the loopback, use the no form of this command.
loopback [cell | diagnostic | line | payload | test]
no loopback [cell | diagnostic | line | payload | test]Syntax Description
Default
line; packets loop from the ATM interface back to the ATM network.
Command Mode
Interface configuration
Usage Guidelines
This command was modified in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
This command is useful for testing because it loops all packets from the ATM interface back to the interface as well as directing the packets to the network.
Example
The following example loops all packets back to the ATM interface:
interface atm 4/0loopback diagnosticRelated Command
network-clock-select
To establish the sources and priorities of the requisite clocking signals for an ATM-CES port adapter, use the network-clock-select global configuration command. To remove the clock source, use the no form of this command.
network-clock-select priority {cbr | atm} slot/port
no network-clock-select priority {cbr | atm} slot/portSyntax Description
Default
No priority clock source is established.
Command Mode
Global configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA.
To support synchronous or synchronous residual time stamp (SRTS) clocking modes on the CBR interface, you must specify a primary reference source to synchronize the flow of CBR data from its source to its destination.
You can specify up to four clock priorities. The highest priority active interface in the router supplies primary reference source to all other interfaces that require network clock synchronization services. The fifth priority is the local oscillator on the ATM-CES port adapter.
Use the show network-clocks command to display the currently configured clock priorities on the router.
Example
The following example defines two clock priorities on the router:
network-clock-select 1 cbr 2/0network-clock-select 2 atm 2/0Related Commands
ces aal1 clock
ces dsx1 clock source
show network-clocksshow atm interface atm
To display ATM-specific information about an ATM interface, use the show atm interface atm privileged EXEC command.
show atm interface atm slot/port
Syntax Description
Command Mode
Privileged EXEC
Usage Guidelines
This command was modified in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
Sample Display
The following is sample output from the show atm interface atm command to display statistics on slot 4, port 0:
Router# show atm interface atm 4/0ATM interface ATM4/0:AAL enabled: AAL5, Maximum VCs: 1024, Current VCs: 6Tx buffers 256, Rx buffers 256, Exception Queue: 32, Raw Queue: 32VP Filter: 0x7B, VCIs per VPI: 1024, Max Datagram Size:4496, MIDs/VC:16PLIM Type:4B5B - 100Mbps, No Framing, TX clocking: LINE4897 input, 2900 output, 0 IN fast, 0 OUT fastRate-Queue 1 set to 100Mbps, reg=0x4EA DYNAMIC, 1 VCCsATM4/0.1:AAL3/4-SMDS address c111.1111.1111 Multicast e222.2222.222Config. is ACTIVEdescribes the fields shown in the display.
Related Command
atm pvc
show atm map
To display the list of all configured ATM static maps to remote hosts on an ATM network, use the show atm map privileged EXEC command.
show atm map
Syntax Description
This command has no arguments or keywords.
Command Mode
Privileged EXEC
Usage Guidelines
This command was modified in Cisco IOS Release 11.1 CA to include a sample display for the ATM-CES port adapter.
Sample Display
The following is sample output from the show atm map command for an ATM-CES port adapter on the Cisco 7200 series router.
Router# show atm mapMap list alien: PERMANENTip 128.1.1.1 maps to VC 6ip 128.1.1.2 maps to VC 6describes the fields shown in the display.
Related Commands
atm pvc
map-listshow atm traffic
To display current, global ATM traffic information to and from all ATM networks connected to the router, use the show atm traffic privileged EXEC command.
show atm traffic
Syntax Description
This command has no arguments or keywords.
Command Mode
Privileged EXEC
Usage Guidelines
This command was modified in Cisco IOS Release 11.1 CA to include a sample display for the ATM-CES port adapter.
Sample Display
The following is sample output from the show atm traffic command for an ATM-CES port adapter on the Cisco 7200 series router.
Router# show atm traffic0 Input packets1044 Output packets1021 Broadcast packets0 Packets received on non-existent VC0 Packets attempted to send on non-existent VC0 OAM cells received0 OAM cells sentdescribes the fields shown in the display.
Related Command
atm pvc
show atm vc
To display all active ATM virtual circuits (PVCs and SVCs) and traffic information, use the show atm vc privileged EXEC command.
show atm vc [vcd]
Syntax Description
Command Mode
Privileged EXEC
Usage Guidelines
This command was modified in Cisco IOS Release 11.1 CA to include a sample display for the ATM-CES port adapter.
If no vcd value is specified, the command displays information for all PVCs and SVCs. The output is in summary form (one line per virtual circuit).
Sample Displays
The following is sample output from the show atm vc command when no vcd value is specified, displaying statistics for all PVCs for an ATM-CES port adapter on a Cisco 7200 series router. The status field is either ACTIVE or INACTIVE.
Router# show atm vcAAL / Peak Avg. BurstInterface VCD VPI VCI Type Encapsulation Kbps Kbps Cells StatusATM6/0 1 0 16 PVC AAL5-ILMI 155000 155000 94 ACTIVEATM6/0 2 0 5 PVC AAL5-SAAL 155000 155000 94 ACTIVEATM6/0.1 303 0 282 SVC LANE-LES 155000 155000 32 ACTIVEATM6/0.1 304 0 281 SVC LANE-LEC 155000 155000 32 ACTIVEATM6/0.1 307 0 286 MSVC LANE-LEC 155000 155000 32 ACTIVEATM6/0.1 308 0 285 MSVC LANE-LES 155000 155000 32 ACTIVEATM6/0.1 309 0 288 SVC LANE-BUS 155000 155000 32 ACTIVEATM6/0.1 310 0 287 SVC LANE-LEC 155000 155000 32 ACTIVEATM6/0.1 311 0 290 MSVC LANE-LEC 155000 155000 32 ACTIVEATM6/0.1 312 0 289 MSVC LANE-BUS 155000 155000 32 ACTIVEATM6/0.1 314 0 292 SVC LANE-LES 155000 155000 32 ACTIVEATM6/0.1 315 0 293 SVC LANE-BUS 155000 155000 32 ACTIVEThe following is sample output from the show atm vc command when a vcd value is specified, displaying statistics for that virtual circuit only.
Router# show atm vc 8ATM4/0: VCD: 8, VPI: 8, VCI: 8, etype:0x0, AAL5 - LLC/SNAP, Flags: 0x30PeakRate: 0, Average Rate: 0, Burst: 0 *32cells, VCmode: 0xE000InPkts: 181061, OutPkts: 570499, InBytes: 757314267, OutBytes: 2137187609InPRoc: 181011, OutPRoc: 10, Broadcasts: 570459InFast: 39, OutFast: 36, InAS: 11, OutAS: 6The following is sample output from the show atm vc command when generation of OAM F5 loopback cells has been enabled.
Router# show atm vc 7ATM4/0: VCD: 7, VPI: 7, VCI: 7, etype:0x0, AAL5 - LLC/SNAP, Flags: 0x30PeakRate: 0, Average Rate: 0, Burst: 0 *32cells, VCmode: 0xE000OAM frequency: 10, InARP DISABLEDInPkts: 0, OutPkts: 0, InBytes: 0, OutBytes: 0InPRoc: 0, OutPRoc:0, Broadcast:0InFast:0, OutFast:0, InAS:0, OutAS:0OAM F5 cells sent: 1, OAM cells received: 0The following is sample output from the show atm vc command for an incoming multipoint virtual circuit.
Router# sh atm vc 3ATM2/0: VCD: 3, VPI: 0, VCI: 33, etype:0x809B, AAL5 - MUX, Flags: 0x53PeakRate: 0, Average Rate: 0, Burst: 0, VCmode: 0xE000OAM DISABLED, InARP DISABLEDInPkts: 6646, OutPkts: 0, InBytes: 153078, OutBytes: 0InPRoc: 6646, OutPRoc: 0, Broadcasts: 0InFast: 0, OutFast: 0, InAS: 0, OutAS: 0interface = ATM2/0, call remotely initiated, call reference = 18082vcnum = 3, vpi = 0, vci = 33, state = Activeaal5mux vc, multipoint callRetry count: Current = 0, Max = 10timer currently inactive, timer value = neverRoot Atm Nsap address: DE.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12The following is sample output from the show atm vc command for an outgoing multipoint virtual circuit.
Router# sh atm v 6ATM2/0: VCD: 6, VPI: 0, VCI: 35, etype:0x800, AAL5 - MUX, Flags: 0x53PeakRate: 0, Average Rate: 0, Burst: 0, VCmode: 0xE000OAM DISABLED, InARP DISABLEDInPkts: 0, OutPkts: 818, InBytes: 0, OutBytes: 37628InPRoc: 0, OutPRoc: 0, Broadcasts: 818InFast: 0, OutFast: 0, InAS: 0, OutAS: 0interface = ATM2/0, call locally initiated, call reference = 3vcnum = 6, vpi = 0, vci = 35, state = Activeaal5mux vc, multipoint callRetry count: Current = 0, Max = 10timer currently inactive, timer value = neverLeaf Atm Nsap address: DE.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12Leaf Atm Nsap address: CD.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12describes the fields shown in the displays.
Related Command
atm pvc
show ces circuit
To show detailed circuit information for the CBR interface, use the show ces circuit privileged EXEC command.
show ces circuit [interface cbr slot/port [circuit-number]]
Syntax Description
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
Examples
The following is sample output from the show ces circuit command.
Switch# show ces circuitInterface Circuit Circuit-Type X-interface X-vpi X-vci StatusCBR6/0 1 HardPVC ATM6/0 0 34 UPCBR6/1 1 HardPVC ATM6/1 0 34 UPdescribes the fields shown in the display.
The following is sample output from the show ces circuit command for a circuit 1 on CBR interface 6/0.
Switch# show ces circuit interface cbr 6/0 1circuit: Name CBR6/0:1, Circuit-state ADMIN_UP / Interface CBR6/0, Circuit_id 1,Port-Type T1, Port-State UPPort Clocking network-derived, aal1 Clocking Method CESIWF_AAL1_CLOCK_SyncChannel in use on this port: 1Channels used by this circuit: 1Cell-Rate: 171, Bit-Rate 64000cas OFF, cell-header 0X3E80 (vci = 1000)Configured CDV 2000 usecs, Measured CDV unavailableErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0state: VcActive, maxQueueDepth 128, startDequeueDepth 111Partial Fill: 47, Structured Data Transfer 24HardPVCsrc: CBR6/0 vpi 0, vci 16Dst: ATM6/0 vpi0, vci 1000describes the fields shown in the display.
Related Commands
show ces circuit
show ces statusshow ces interface cbr
To show detailed CBR port information, use the show ces interface cbr privileged EXEC command.
show ces interface cbr slot/port
Syntax Description
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
Example
The following is sample output from the show ces circuit command for CBR interface 6/0.
router# show ces interface cbr 6/0Interface: CBR6/0 Port-type:T1-DCUIF Status: UP Admin Status: UPChannels in use on this port: 1LineType: ESF LineCoding: B8ZS LoopConfig: NoLoopSignalMode: NoSignalling XmtClockSrc: network-derivedDataFormat: Structured AAL1 Clocking Mode: Synchronous LineLength: 0_110LineState: LossOfSignalErrors in the Current Interval:PCVs 0 LCVs 0 ESs 0 SESs 0 SEFSs 0UASs 0 CSSs 0 LESs 0 BESs 0 DMs 0Errors in the last 24Hrs:PCVs 514 LCVs 0 ESs 0 SESs 1 SEFSs 0UASs 0 CSSs 0 LESs 0 BESs 0 DMs 0Input Counters: 0 cells, 0 bytesOutput Counters: 0 cells, 0 bytesdescribes the fields shown in the display.
Related Command
show ces status
To display the status of the ports on the ATM-CES port adapter, use the show ces status privileged EXEC command.
show ces status
Syntax Description
This command has no keywords or arguments.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
Example
The following is sample output from the show ces status command. This output shows the interface name, the status of the interface, the administrative status of the interface, the port type, and the number of channels in use on the interface. The status of the interface can be UP (in operation) or DOWN (not in operation).
Router# show ces statusInterface IF Admin Port Channels inName Status Status Type use------------- -------- --------- ----------- -----------CBR0/0/0 UP UP T1 1-24CBR0/0/1 UP UP T1 1-24CBR0/0/2 UP UP T1 1-24CBR0/0/3 UP UP T1Related Command
show interface cbr
To display the information about the constant bit rate (CBR) interface on the ATM-CES port adapter, use the show interface cbr privileged EXEC command.
show interface cbr
Syntax Description
This command has no keywords or arguments.
Command Mode
Privileged EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
Example
The following is sample output from the show interface cbr command.
Switch# show interface cbr 6/0CBR6/0 is up, line protocol is upHardware is DCUMTU 0 bytes, BW 1544 Kbit, DLY 0 usec, rely 255/255, load 248/255Encapsulation ET_ATMCES_T1, loopback not setLast input 00:00:00, output 00:00:00, output hang neverLast clearing of "show interface" counters neverQueueing strategy: fifoOutput queue 0/0, 0 drops; input queue 0/75, 0 drops5 minute input rate 1507000 bits/sec, 3957 packets/sec5 minute output rate 1507000 bits/sec, 3955 packets/sec3025960 packets input, 142220120 bytes, 0 no bufferReceived 0 broadcasts, 0 runts, 0 giants0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort3030067 packets output, 142413149 bytes, 0 underruns0 output errors, 0 collisions, 0 interface resets0 output buffer failures, 0 output buffers swapped outdescribes the fields shown in the display.
Related Command
show network-clocks
To show which ports are designated as network clock sources, use the show network-clocks EXEC command.
show network-clocks
Syntax Description
This command has no keywords or arguments.
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA for the ATM-CES port adapter.
Example
The following is sample output from the show network-clocks EXEC command.
Switch# show network-clocksPriority 1 clock source: ATM3/0/0Priority 2 clock source: System clockPriority 3 clock source: System clockPriority 4 clock source: System clockCurrent clock source:ATM3/0/0, priority:1Related Command
Supported MIBs
The ATM UNI specification defines the required management information base (MIB) functionality for ATM interfaces. MIB attributes are readable and writable across the Interim Local Management Interface (ILMI) by using the Simple Network Management Protocol (SNMP). The ILMI uses SNMP, without UDP, and Internet Protocol (IP) addressing along with the ATM MIB.
The ATM-CES port adapter fully supports RFC 1213 and a subset of the following interface MIBS: RFC 1406, RFC 1407, and SONET MIB RFC 1595.
For RFC1406, we support DS1 Near End Group including—DS1 Configuration Table, DS1 Current Table, DS1 Interval Table, and DS1 Total Table.
For RFC1406, we do not support DS1 Far End Group and DS1 Fractional Group.
For RFC1407, we support DS3 Near End Group including—DS3/E3 Configuration Table, DS3/E3 Current Table, DS3/E3 Interval Table, and DS3/E3 Total Table.
For RFC1407, we do not support DS3 Far End Group and DS3/E3 Fractional Group.
For RFC1595, we support SONET Medium Group including—sonetMediumTable; SONET Section Group including—sonetSectionCurrentTable and sonetSectionIntervalTable; SONET Line Group including—sonetLineCurrentTable, sonetLineIntervalTable; and SONET Path Group including— sonetPathCurrentTable and sonetPathIntervalTable.
For RFC1595, we do not support SONET Far End Line Group, SONET Far End Path Group, SONET VT Group, and SONET Far End VT Group.
Note
What to Do Next
For more information on the ATM-CES port adapter, refer to the PA-A2 ATM-CES Port Adapter Installation and Configuration publication. Also refer to the "PA-A2 ATM-CES Port Adapter Enhancements" section in this document.
Guest
