MPLS Infrastructure Changes: Introduction of MFI and Removal of MPLS LSC and LC-ATM Features
First Published: July 11, 2008
Last Updated: July 11, 2008
This document explains the new MPLS Forwarding Infrastructure (MFI) and removal of support for MPLS label switch controller (LSC) and label-controlled ATM (LC-ATM) features and commands, starting in Cisco IOS Release 12.4(20)T.
•Information About MPLS Infrastructure Changes
•Feature Information for MPLS Infrastructure Changes
Information About MPLS Infrastructure Changes
You should understand the following concepts about the MPLS Infrastructure Changes feature:
•Introduction of the MPLS Forwarding Infrastructure
•Introduction of IP Rewrite Manager
•Removal of Support for MPLS LSC and LC-ATM Features
•MPLS LSC and LC-ATM Configurations
•Removal of Support for MPLS LSC and LC-ATM Commands
Introduction of the MPLS Forwarding Infrastructure
The MPLS control plane software is enhanced to make MPLS more scalable and flexible. The MFI, which manages MPLS data structures used for forwarding, replaces the Label Forwarding Information Base (LFIB).
Note The MFI and LFIB do not coexist in the same image. Users must use MFI starting with Cisco IOS Release 12.4(20)T and later releases.
Introduction of IP Rewrite Manager
Cisco IOS Release 12.4(20)T introduces a module called the MPLS IP Rewrite Manager (IPRM) that manages the interactions between Cisco Express Forwarding, the IP Label Distribution Modules (LDMs), and the MFI. MPLS IPRM is enabled by default. You need not configure or customize the IPRM. The following commands are related to IPRM:
•clear mpls ip iprm counters
•debug mpls ip iprm
•debug mpls ip iprm cef
•debug mpls ip iprm events
•debug mpls ip iprm ldm
•debug mpls ip iprm mfi
•show mpls ip iprm counters
•show mpls ip iprm ldm
For information about these commands, see the following documents:
Cisco IOS Debug Command Reference http://www.cisco.com/en/US/docs/ios/debug/command/reference/db_book.html
Cisco IOS MPLS Command Reference http://www.cisco.com/en/US/docs/ios/mpls/command/reference/mp_book.html
Removal of Support for MPLS LSC and LC-ATM Features
The following MPLS LSC and LC-ATM features are no longer supported, starting with Cisco IOS Release 12.4(20)T:
•MPLS Scalability Enhancements for LSC and ATM LSR
•MPLS LSC Redundancy
•MPLS—OAM Insertion and Loop Detection on LC-ATM
•MPLS CoS Multi-VC Mode for PA-A3
•MPLS over ATM: Virtual Circuit Merge
•MPLS Diff-Serv Aware Traffic Engineering over ATM
•VSI Master MIB
MPLS LSC and LC-ATM Configurations
Before upgrading to Cisco IOS Release 12.4(20)T, remove all the MPLS LSC and LC-ATM configurations from the routers in your network. If your core network has ATM links, you can use packet-based MPLS. See the MPLS Label Distribution Protocol Overview for more information. If you provide ATM access to customers, you can use the Any Transport over MPLS: ATM over MPLS feature. See Any Transport over MPLS for more information.
If you have MPLS LSC or LC-ATM features configured and you upgrade to Cisco IOS Release 12.4(20)T, the configuration is not accepted. The system displays "unrecognized command" errors for any commands that are no longer supported.
Removal of Support for MPLS LSC and LC-ATM Commands
The following commands are no longer supported, starting with Cisco IOS Release 12.4(20)T:
•debug mpls atm-cos
•debug mpls atm-ldp api
•debug mpls atm-ldp failure
•debug mpls atm-ldp routes
•debug mpls atm-ldp states
•debug mpls xmpls cross-connect
•debug mpls xmpls errors
•debug mpls xmpls events
•debug mpls xmpls vc
•debug mpls xtagatm cross-connect
•debug mpls xtagatm errors
•debug mpls xtagatm events
•debug mpls xtagatm vc
•debug vsi api
•debug vsi errors
•debug vsi events
•debug vsi packets
•debug vsi param-groups
•mpls atm control-vc
•mpls atm cos
•mpls atm disable-headend-vc
•mpls atm multi-vc
•mpls atm vpi
•mpls atm vp-tunnel
•mpls ldp atm control-mode
•mpls ldp atm vc-merge
•mpls request-labels for
•mpls traffic-eng atm cos global-pool
•mpls traffic-eng atm cos sub-pool
•show controllers vsi control-interface
•show controllers vsi descriptor
•show controllers vsi session
•show controllers vsi status
•show controllers vsi traffic
•show controllers xmpls
•show controllers xtagatm
•show interface xtagatm
•show mpls atm-ldp bindings
•show mpls atm-ldp bindwait
•show mpls atm-ldp capability
•show mpls atm-ldp summary
•show mpls cos-map
•show mpls prefix-map
•show xtagatm cos-bandwidth-allocation
•show xtagatm cross-connect
•show xtagatm vc
•snmp-server enable traps vsimaster
The following sections provide references related to the MPLS Infrastructure Changes feature.
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Feature Information for MPLS Infrastructure Changes
Table 1 lists the release history for this feature.
Not all commands may be available in your Cisco IOS software release. For release information about a specific command, see the command reference documentation.
Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS and Catalyst OS software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Note Table 1 lists only the Cisco IOS software release that introduced support for a given feature in a given Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS software release train also support that feature.
Table 1 Feature Information for MPLS Infrastructure Changes
MPLS Infrastructure Changes
In Cisco IOS Release 12.4(20)T, this feature was introduced.
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