Cisco Cisco IOS Software Release 12.0(23)S
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Cisco IOS Release 12.0(23)S
MPLS VPN—Inter-AS—IPv4 BGP Label
Distribution
Distribution
Feature History
This feature enables you to set up a VPN service provider network so that the autonomous system
boundary routers (ASBRs) exchange IPv4 routes with MPLS labels of the provider edge (PE) routers.
Route reflectors (RRs) exchange VPNv4 routes, using multihop, multiprotocol, External Border
Gateway Protocol (EBGP). This configuration saves the ASBRs from having to store all the VPNv4
routes. Using the route reflectors to store the VPNv4 routes and forward them to the PE routers results
in improved scalability.
boundary routers (ASBRs) exchange IPv4 routes with MPLS labels of the provider edge (PE) routers.
Route reflectors (RRs) exchange VPNv4 routes, using multihop, multiprotocol, External Border
Gateway Protocol (EBGP). This configuration saves the ASBRs from having to store all the VPNv4
routes. Using the route reflectors to store the VPNv4 routes and forward them to the PE routers results
in improved scalability.
This feature module includes the following sections:
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Release
Modification
12.0(21)ST
This feature was introduced.
12.0(22)S
This feature was integrated into Cisco IOS Release 12.0(22)S. Support for
the Cisco 12000 series routers (for specific line cards supported, see
the Cisco 12000 series routers (for specific line cards supported, see
) was added.
12.0(23)S
This feature was integrated into Cisco IOS Release 12.0(23)S. Support for
the Cisco 12000 Series Eight-Port OC-3c/STM-1c ATM Line Card (8-Port
OC-3 ATM) and the Cisco 12000 Series Three-Port Gigabit Eternity Line
Card (3-Port GbE) was added.
the Cisco 12000 Series Eight-Port OC-3c/STM-1c ATM Line Card (8-Port
OC-3 ATM) and the Cisco 12000 Series Three-Port Gigabit Eternity Line
Card (3-Port GbE) was added.