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Software Configuration of ATM ISE Line Cards for Cisco 12000 Series Routers
Table 2
Feature
Maximum number of AToM Tunnels per line card with features
Maximum number of AToM Tunnels per line card with cell packing
1. Includes features such as policing
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:
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Scalability Limitations for the 4-Port ATM ISE Line Card (continued)
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.
Information About the 4-Port ATM ISE Line Card
Layer 2
Limitation
1
1024
1024
Cisco IOS Release 12.0(27)S
3
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Troubleshooting
