Cisco Cisco IOS Software Release 12.0(22)S

The following qualifications apply when you are configuring an 8-Port OC-3 STM-1 ATM line card:

You can configure VCs using any VPI/VCI values on up to 256 VPIs per port. However, if you 
configure more than 256 VCs per port using sparse VCI numbers, this may restrict the configuration 
to fewer than the maximum of 2048 VCs per port. It is recommended that you use contiguous VCI 
numbers inside each VPI.

If you configure eight traffic classes, one class must be explicitly configured as the priority class.

You can configure either per-VC queue limits or random-detect, but not both on the same queue.

Multiprotocol Label Switching (MPLS)

Layer 3 quality-of-service (QoS)

Weighted Random Early Detection (WRED)

Modified Deficient Round Robin (MDRR)

Low Latency Queueing (LLQ)

See the 

 in the next section for a list of documents that describe these features and 

technologies.

The following documents provide additional information about installing and configuring the 8-Port 
OC-3 STM-1 ATM line card:

For information on the software features added in the 12.0(23)S release, see the Release Notes for Cisco 
12000 Series Routers for Cisco IOS Release 12.0 S. The MPLS VPN Inter-AS and CsC features are 
described in the release notes. The remaining three software features added in 12.0(23)S have separate 
feature module publications that provide additional information about these features:

You can also find additional information in the installation and configuration guide for your Cisco 12000 
series Internet Router and in the Cisco IOS Release 12.0 documentation set.