Cisco Cisco IOS Software Release 12.4(4)T

The following restrictions apply to the Routed Bridge Encapsulation with ATM Virtual Circuit Bundles 
feature:

RBE over switched virtual circuit (SVC) bundles is not supported.

SVC bundle member selection based on QoS groups is not supported.

Fast switching is not supported (only Cisco Express Forwarding (CEF) switching and process 
switching are supported).

PVC bundle member selection based on QoS groups does not support distributed platforms. 

PVC bundle member selection based on QoS groups does not support bumping, protection, or PVC 
bundle incompleteness detection.

PVC bundles are supported under the following conditions (numbers are maximum per interface and per 
router):

1000 PVC bundles with AAL5 LLC/SNAP encapsulation, and each PVC bundle with four PVC 
bundle members

800 PVC bundles with two members each and with AAL5 LLC/SNAP encapsulation, and interfaces 
with 4000 PVCs overall (including PVC bundle members)

To configure the Routed Bridge Encapsulation with ATM Virtual Circuit Bundles feature, you should 
understand the following concepts:

Without this feature, PVC bundle member selection is made based on ToS bit settings (for IP packets) 
or EXP bit settings (for MPLS packets). With this feature, you can make the PVC bundle member 
selection based on the QoS group value associated with the packet: on the ingress before route selection 
or on the egress after selecting the adjacency, the packet’s pak_type header is marked with the QoS group 
to use based on the generic match criterion provided by the Modular QoS command line interface 
(MQC).