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ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 16 Configuring Tag Switching and MPLS
MPLS Overview
Hardware and Software Restrictions
The following restrictions or limitations apply to MPLS on the Catalyst 8540, Catalyst 8510 and
LightStream 1010:
• MPLS is supported on the Enhanced Gigabit Ethernet, POS, Enhanced ATM router module (1483
PVC), Fast Ethernet, and ATM interfaces
Note Fast Ethernet and ATM interfaces must be linked to an Enhanced ATM router module
interface by using the mpls-forwarding command to provide MPLS support.
• Traffic Engineering MPLS-QOS is not supported.
• Multicast over MPLS is not supported.
• Access-list based tag advertisements and filtering of MPLS packets based on access-lists are not
supported.
• Jumbo frames on MPLS interfaces is not supported.
• Support for EBGP, RIP, OSPF between CE-PE and support for RIP, OSPF, and ISIS between PE-P.
In the case of a TC-ATM link between PE-P, only OSPF and ISIS protocols are supported.
• Support IBGP between PE.
• Port-channel cannot be MPLS enabled.
• Port-channel cannot be VRF enabled.
Table 16-8 Additional MPLS Configuration Documentation
Document Section URL
ATM Switch Router Software
Configuration Guide
“Configuring Tag
Switching”
http://www.cisco.com/univercd/cc/td/d
oc/product/atm/c8540/12_1/1hous_mt/
sw_conf/tag.htm
Layer 3 Switching Software
Feature and Configuration
Guide
“Tag Switching” http://www.cisco.com/univercd/cc/td/d
oc/product/l3sw/8540/12_1/lhouse/sw
_confg/8500tags.htm
ATM and Layer 3
Troubleshooting Guide
“Troubleshooting Tag and
MPLS Switching
Connections”
See PDF Version for EFT
documentation
Cisco IOS Switching Services
Configuration Guide, Release
12.1
“Multi protocol Label
Switching Overview”
http://www.cisco.com/univercd/cc/td/d
oc/product/software/ios121/121cgcr/s
witch_c/xcprt4/xcdtagov.htm#xtocid48
0
Cisco IOS Switching Services
Configuration Guide, Release
12.1
“Configuring Multiprotocol
Label Switching”
http://www.cisco.com/univercd/cc/td/d
oc/product/software/ios121/121cgcr/s
witch_c/xcprt4/xcdtagc.htm#xtocid26
4140
Cisco IOS Switching Services
Configuration Guide, Release
12.1
“Configuring Cisco Express
Forwarding”
http://www.cisco.com/univercd/cc/td/d
oc/product/software/ios121/121cgcr/s
witch_c/xcprt2/xcdcefc.htm#46064