Cisco ISE - Line Card ISE User manual

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Software Configuration of ATM ISE Line Cards for
Cisco 12000 Series Routers
This feature module describes the software configuration for the Cisco 4-Port ATM Internet Services
Engine (ISE) line cards in the Cisco 12000 Series Router. The line card comes in two variations:
OC-12c/STM-4c and OC-3c/STM-1; otherwise, the features are the same on both cards.
Feature History for the 4-Port ATM ISE Line Card
Finding Support Information for Platforms and Cisco IOS Software Images
Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image
support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account on
Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at
the login dialog box and follow the instructions that appear.
Contents
•Prerequisites for the 4-Port ATM ISE Line Card, page 2
•Restrictions for the 4-Port ATM ISE Line Card, page 2
•Information About the 4-Port ATM ISE Line Card, page 3
•How to Perform a Basic Configuration of the 4-Port ATM ISE Line Card, page 5
•How to Configure Layer 3 Terminated VCs on the 4-Port ATM ISE Line Card, page 8
•How to Configure AToM VCs on the 4-Port ATM ISE Line Card, page 35
•Troubleshooting ATM Errors on the 4-Port ATM ISE Line Card, page 76
Release Modification
12.0(25)S The 4-Port OC-12c/STM-4c ATM ISE line card was introduced.
12.0(26)S2 The 4-Port OC-3c/STM-1 ATM ISE line card was integrated into 12.0(26)S.
12.0(27)S1 The 4-Port OC-3c/STM-1 ATM ISE line card was introduced. AToM,
Layer 2/Layer 3 features on a single port and enhanced QoS policing
features were introduced.

Software Configuration of ATM ISE Line Cards for Cisco 12000 Series Routers
Prerequisites for the 4-Port ATM ISE Line Card
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Cisco IOS Release 12.0(27)S
•Configuring Modular QoS CLI, page 84
•Additional References, page 91
•Command Reference, page 92
•Glossary, page 98
Prerequisites for the 4-Port ATM ISE Line Card
There are no prerequisites for using the 4-port ATM ISE line card.
Restrictions for the 4-Port ATM ISE Line Card
Restrictions and limitations for the 4-Port ATM ISE line cards are listed in Table 1 and Table 2.
Table 1 Supported Values for 4-Port ATM ISE Line Card
Feature Limitation
Maximum number of cell packing or policing VCs1
1. VC=virtual circuit.
508 per port2
2. Hardware limitation.
Maximum number of active VCs3:
Layer 2
Layer 3
3. Subject to overall system limitation and configuration.
10244per port and card
20473per port and card
4. If cell packing or policing are configured, the remaining 516 available VCs can be configured for cell relay over MPLS or
AAL5 over MPLS.
Range of VPI5values
5. VPI=virtual path identifier.
Varies with vc-per-vp value.
In Release 12.0(25)S: up to 255
In Release 12.0(27)S:
UNI VPIs—up to 255; NNI VPIs—up to 4095
Range of VCI6values
6. VCI=virtual channel identifier.
Varies with vc-per-vp value, up to 65,535
Table 2 Scalability Limitations for the 4-Port ATM ISE Line Card
Feature
Layer 2
Limitation
Maximum number of AToM Tunnels per port 1024
Maximum number of AToM Tunnels per line card 1024
Maximum number of AToM Tunnels per router 2048
Maximum number of AToM Tunnels per port with features1508
Maximum number of AToM Tunnels per port with cell packing 508

Software Configuration of ATM ISE Line Cards for Cisco 12000 Series Routers
Information About the 4-Port ATM ISE Line Card
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Information About the 4-Port ATM ISE Line Card
The 4-Port ATM ISE line cards, which deliver line rate OC-12c/STM-4c or OC-3c/STM-1 bandwidth,
provide enhanced Layer 2 and Layer 3 capabilities for high-speed customer aggregation, backbone
connectivity, and peering solutions. These cards perform traffic shaping and per-virtual circuit (VC)
queueing, and support per-VC Modified Deficit Round Robin (MDRR) with per-VC low latency
queueing (LLQ). They also support Any Transport over MPLS (AToM), enhanced traffic policing, and
the ability to configure both AToM VCs and terminated VCs on a single port.
MDRR is implemented on a per-VC basis with up to eight queues per VC, where one of the queues is a
low latency queue (LLQ). Both per-VC Weighted Random Early Detection (WRED) and per-VC MDRR
are performed in the hardware.
The 4-Port OC-12c/STM-4c ATM ISE line card provides the Cisco 12000 Series Router with four
622-Mbps ATM interfaces. The 4-Port OC-3c/STM-1 ATM ISE line card provides four 155-Mbps ATM
interfaces. The cards communicate with the Cisco 12000 Series Router switch fabric.
Features of the 4-Port ATM ISE Line Card
The following are the features supported by the 4-Port ATM ISE line cards:
•Traffic shaping on a per-VC and per-virtual path (VP) basis with a minimum granularity of 1 Kbps,
in compliance with I.371 granularity definition.
•Per-VC queueing using configurable per-VC queue limits or per-VC WRED.
•A VC address can be any of the virtual path identifier (VPI) and virtual channel identifier (VCI)
range. User-network interface (UNI) VPIs can be in the range of 0..255; network-to-network
interface (NNI) VPIs can be in the range of 0..4095. VCIs can be in the range 0..65,535.
•Per-VC statistics through hardware.
•Per-port statistics through hardware.
•AAL5 [I.362] [I.363] reassembly and segmentation.
•Non-real-time variable bit rate (VBR-nrt) and real time variable bit rate (VBR-rt) traffic shaping
with 99+ percent shaping accuracy.
•Constant bit rate (CBR) traffic shaping with 99+ percent shaping accuracy.
•Unspecified bit rate (UBR) with support for optional peak cell rate (PCR) parameter with 99+
percent shaping accuracy.
•VP tunnel traffic shaping for the full range of VPI on UNI interfaces—up to 256 VP tunnels per port.
•Maximum transmission unit (MTU) of up to 9180 bytes.
•Each VC supports up to 9K MTU.
Maximum number of AToM Tunnels per line card with features11024
Maximum number of AToM Tunnels per line card with cell packing 1024
1. Includes features such as policing
Table 2 Scalability Limitations for the 4-Port ATM ISE Line Card (continued)
Feature
Layer 2
Limitation

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Information About the 4-Port ATM ISE Line Card
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Cisco IOS Release 12.0(27)S
•F4 and F5 flows of operation, administration, and maintenance (OAM) cells and OAM management
specified as requirements by [UNI 3.x] [I.610].
Layer 3-Specific Features
•Supports up to 2047 traffic-shaped VC connections per interface.1
•Bidirectional OC-12c/STM-4c line rate for 64-byte packets (two cells) on all four ports. This is an
aggregate line rate of approximately 2.8 million packets per second.
•Bidirectional OC-3c/STM-1 full line rate for any packet size on all four ports.
•Support for up to 120 distinct WRED profiles per interface. These profiles are configurable using
Cisco IOS software.
•ATM VC bundle management.
•MPLS Traffic Engineering (TE), including Single Area (OSPF,ISIS), DS-TE (OSPF,ISIS),
Autobandwidth, TE Metrics (OSPF,ISIS), TE Node Exclusion (OSPF,ISIS), Multiarea (OSPF,ISIS).
•Support for thousands of ACL/xACL entries, including both ingress and egress for interfaces and
subinterfaces.
•Committed Access Rate (CAR), including CAR action continue, including both ingress and egress
for interfaces and subinterfaces.
•Policy-based routing (PBR) for interfaces and subinterfaces.
•Border Gateway Protocol (BGP) policy accounting.
•Unicast reversepath forwarding (uRPF) loose mode.
•Sophisticated MQC classifications based on IP ACL/xACL, IP precedence/DSCP, MPLS EXP, QoS
groups, and more.
•IP and MPLS traffic marking
•QoS Policy Propagation via BGP (QPPB)
•Ingress IP-based traffic shaping.
•Netflow, including sampled ingress/egress Netflow, aggregated Netflow, and MPLS-aware Netflow.
•High Availability, including route processor redundancy (RPR), RPR+, and Stateful Switchover
(SSO).
•ATM OAM F5 continuity check.
•MPLS virtual private network (VPN).
•UNI 3.x and Interim Local Management Interface (ILMI).
•Switched virtual circuit (SVC) support for point-to-point and point-to-multipoint connections.
•Multicast packet replication.
•ATM cell loss priority (CLP) bit setting.
•MPLS VPN Inter-AS.
•MPLS VPN carrier supporting carrier (CsC).
Layer 2-Specific Features
•Supports up to 2047 traffic-shaped VC connections per interface.2
1. Subject to overall system limitation and configuration.

Software Configuration of ATM ISE Line Cards for Cisco 12000 Series Routers
How to Perform a Basic Configuration of the 4-Port ATM ISE Line Card
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•Any Transport over Multiprotocol Label Switching (MPLS) [AToM].
•AT M OA M E m u l a t i o n
•Cell-based policing
•Experimental bit marking
•Cell packing for port, VC, and VP modes
•Cell relay for port, VC, and VP modes
How to Perform a Basic Configuration of the 4-Port ATM ISE Line
Card
The 4-port ATM ISE line cards provide the ability to configure Layer 2 AToM VCs as well as Layer 3
terminated VCs. On any individual ATM interface, you can configure both AToM VCs and terminated
VCs as required. The configurations of these are discussed in subsequent sections in this document. This
section provides basic ATM interface configuration information and discusses those features that are
applicable to both AToM VCs and terminated VCs.
Configuring ATM interfaces and virtual circuits is described in the following sections:
•Configuring an ATM Interface, page 5
•Configuring UNI and NNI Cell Support, page 7
•Troubleshooting Tips, page 7
Configuring an ATM Interface
Use the show running-config command to display current port configuration information. On power up,
the interface on a new 4-Port ATM ISE line card is shut down. To enable the interface, you must enter a
no shutdown command in configuration mode.
Default Interface Configuration
When the 4-Port ATM ISE line card is enabled (taken out of shutdown) with no additional configuration
commands applied, the default interface configuration file parameters, described in Table 3, are used.
2. Subject to overall system limitation and configuration.
Table 3 4-Port ATM ISE Line Card Default Configuration Values
Parameter Configuration File Entry Default Value
Maximum transmission unit (MTU) [no] mtu bytes 4470 bytes
Maximum numbers of virtual circuits [no] atm maxvc numvc 2047
Loopback [no] loopback [diagnostic | line] no loopback
Internal clock [no] atm clock internal no atm clock internal
SONET framing [no] atm sonet stm-4 no atm sonet stm-4

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Configuration Basics
After you verify that the new 4-Port ATM ISE line card is installed correctly, use the configure command
to configure the new interface. Be prepared with the information that you will need, such as the interface
IP address.
The Cisco 12000 Series Router identifies an interface address by its line card slot number and port
number, in the format slot/port. Because each 4-Port ATM ISE line card contains four ATM interfaces,
the port numbers are 0 to 3. For example, the slot/port address of an ATM interface on a 4-Port ATM ISE
line card installed in line card slot 2 is 2/0 to 2/3.
Use the following procedure to create a basic configuration, including enabling an interface and
specifying IP routing. You might also need to enter other configuration subcommands, depending on the
requirements for your system configuration.
(For descriptions of configuration subcommands and the configuration options available, refer to the
appropriate software publications in the “Related Documents” section on page 91.)
SUMMARY STEPS
1. show version
2. show interfaces
3. enable
4. configure terminal
5. interface atmslot/port
6. no shutdown
7. Ctrl-Z
8. copy running-config startup-config
DETAILED STEPS
Command or Action Purpose
Step 1 show version Confirm that the system recognizes the line card.
Step 2 show interfaces Check the status of each port on the line card.
Step 3 enable
Example:
Router> enable
Enables privileged EXEC mode.
•Enter your password if prompted.
Step 4 configure terminal
Example:
Router# configure terminal
Enters global configuration mode.
Step 5 interface atmslot/port
Example:
Router(config)# interface atm1/3
Enter interface configuration mode for the specified ATM
interface.

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Configuring UNI and NNI Cell Support
You can designate that the cell format for an interface be either User Network Interface (UNI) or
Network Node Interface (NNI). The default setting is UNI. Use the atm maxvpi-bits command to
change the maximum VPI range from 0..255 (UNI) to 0..4095 (NNI).
Router(config)# interface atm 2/2
Router(config-if)# atm maxvip-bits 12
To change the interface setting back to NNI, use the no form of this command: no maxvip-bits 12.
This configuration should be entered before the connection is added.
Troubleshooting Tips
To verify the operation of the interfaces configured on the 4-Port ATM ISE line card, use the following
commands:
To display information about the current state of the ATM network, use the following commands:
Step 6 no shutdown
Example:
Router(config-if)# no shutdown
Change the state of the interface to up and enable the
interface.
Step 7 Press Ctrl-Z Exit configuration mode.
Perform this after completing all desired configuration
commands on the interface or subinterface.
Step 8 copy running-config startup-config Write the new configuration to memory.
Command or Action Purpose
Command Purpose
Router# show version Displays the configuration of the system hardware, the software release, the
names and sources of configuration files, and the boot images. Verify that
the list includes the newly configured 4-Port ATM ISE line card ports and
interfaces.
Router# show gsr Displays information about the hardware modules installed in the
Cisco 12000 Series Router.
Router# show interfaces atm slot/port Displays information about the ATM interfaces. For example, to display
information about slot 2, port 0, enter:
Router# show interfaces atm2/0
Router# show running-config Displays information about the currently running configuration in RAM.

Software Configuration of ATM ISE Line Cards for Cisco 12000 Series Routers
How to Configure Layer 3 Terminated VCs on the 4-Port ATM ISE Line Card
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How to Configure Layer 3 Terminated VCs on the 4-Port ATM ISE
Line Card
The following configuration tasks are described in this section:
•Configuring Layer 3 Terminated Virtual Circuits, page 8
•Configuring ATM Shaping on Terminated VCs, page 9
•Configuring OAM Management on Terminated VCs, page 11
•Configuring Quality of Service on Terminated VCs, page 14
•Configuring and Managing VC Bundles, page 28
•Configuring Bridged PVCs, page 35
Configuring Layer 3 Terminated Virtual Circuits
A virtual circuit (VC) is a point-to-point connection between two ATM devices. A VC is established for
each ATM end node with which the router communicates. The characteristics of the VC are established
when it is created and include the following for the 4-Port ATM ISE line cards:
•Quality of service (QoS)
•ATM adaptation layer (AAL) mode
•Encapsulation type (LLC/SNAP, IP MUX, and NLPID)
•Peak and average transmission rates
Permanent virtual circuits (PVCs) configured on the router remain active until the circuit is removed
from the configuration. All virtual circuit characteristics apply to PVCs. When a PVC is configured, all
configuration options are passed to the 4-Port ATM ISE line card. These PVCs are written to the
nonvolatile RAM (NVRAM) as part of the configuration and are used when the Cisco IOS image is
reloaded.
When you create a PVC, you create a virtual circuit descriptor (VCD) and attach it to the VPI and VCI.
The VCD tells the card which VPI/VCI to use for a particular packet. The 4-Port ATM ISE line card
requires this feature to manage the packets for transmission. The number chosen for the VCD is
independent of the VPI/VCI used.
A permanent virtual path (PVP) is like a bundle of VCs, transporting all cells with a common VPI, rather
than a specific VPI and VCI.
PVCs are created and configured using the pvc command in interface configuration mode. PVPs are
created and configured using the atm pvp command in interface configuration mode.
The syntax of the pvc command is as follows:
pvc [name] vpi/vci
Command Purpose
Router# show atm interface atm slot/port Displays current ATM-specification information about the 4-Port ATM ISE
line card interface.
Router# show atm traffic Displays current ATM statistics.

Software Configuration of ATM ISE Line Cards for Cisco 12000 Series Routers
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The syntax of the atm pvp command is:
atm pvp vpi
vpi is the ATM network VPI to use for this virtual circuit, in the range of 0 to 255 for UNI or 0 to 4095
for NNI; vci is the ATM network VCI to use for this virtual circuit, in the range of 0 to 655,535.
Troubleshooting Tips
To display information about the connected virtual circuits, use the following commands:
Configuring ATM Shaping on Terminated VCs
The 4-Port ATM ISE line cards support IP traffic shaping on terminated VCs. The following ATM
shaping options are available:
•Constant bit rate (CBR)—Supports real-time applications that request a static amount of bandwidth
that is continuously available for the duration of the connection. (See Step 5.)
•Real-time variable bit rate (VBR-rt)—Supports real-time applications that have bursty transmission
characteristics. (See Step 6.)
•Non-real-time variable bit rate (VBR-nrt)—Supports non-real-time applications with bursty
transmission characteristics that tolerate high cell delay, but require low cell loss. (See Step 7.)
•Unspecified bit rate (UBR)—Supports non-real-time applications that tolerate both high cell delay
and cell loss on the network. There are no network service-level guarantees for the UBR service
category, and therefore it is a best-effort service. (See Step 8.)
To configure ATM shaping, perform the shaping commands in PVC mode. You should use only one of
the shaping commands in Step 5 through Step 8, depending on the type of shaping to be configured.
Restrictions
CDVT
When traffic shaping is configured on a VC, the cell delay variation (CDV) is set for the VC. This value
will change according to the shaping class defined. The cell delay variation tolerance (CDVT) values are
shown in Table 4.
Command Purpose
Router# show atm pvc Displays current ATM PVC information.
Router# show atm vc Displays current ATM VC information.
Table 4 CDVT per Traffic Class for Traffic Shaping
Traffic Class OC-12c/STM-4c Line Card OC-3c/STM-1 Line Card
CBR 70 μsec 70 μsec
UBR 185 μsec 305 μsec
VBR-RT 70 μsec 70 μsec
VBR-NRT 185 μsec 305 μsec

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Note For VBR connections in which the sustainable cell rate (SCR) is not equal to the PCR value, the CDVT
is significantly lower.
Decreased VC Throughput
If you configure a VC on a 4-Port OC-12/STM-4 ATM ISE interface with a peak cell rate (PCR) or
sustainable cell rate (SCR) greater than OC-6 (using the ubr, vbr-nrt, vbr-rt, or cbr commands), and
attach a traffic policy with MDRR (configured using the bandwidth command) to the interface for
specified traffic classes, when traffic on the interface from the specified classes is equal to or greater than
the configured PCR or SCR values, frequent queueing and dequeueing changes occur between the
MDRR queues and may cause a decreased VC throughput.
Decreased throughput is more likely to occur when the traffic consist of small packets and when a high
amount of traffic is sent toward the high-priority queue. Such traffic will increase significantly the
frequency of switches between queues, which may cause the nonpriority queues to lose their bandwidth.
Therefore, when configuring a VC to more than OC-6, it is recommended to limit the high priority traffic
using the police command.
SUMMARY STEPS
Use either Step 5, Step 6, Step 7 or Step 8 depending on the desired shaping.
1. enable
2. configure terminal
3. interface atmslot/port.subinterface
4. pvc vpi/vci
5. cbr pcr
6. vbr-rt pcr scr
7. vbr-nrt pcr scr
8. ubr pcr
DETAILED STEPS
Command or Action Purpose
Step 1 enable
Example:
Router> enable
Enables privileged EXEC mode.
•Enter your password if prompted.
Step 2 configure terminal
Example:
Router# configure terminal
Enters global configuration mode.
Step 3 interface atmslot/port.subinterface
Example:
Router(config)# interface atm1/0.2
Specifies an ATM interface or subinterface to configure.
Configure subinterfaces so that you can take advantage of
access list definitions for the IP traffic.