Specifications

B-10
Cisco MWR 2941 Mobile Wireless Edge Router Software Configuration Guide, Release 12.2(33)MRB
OL-21227-02
Appendix B Cisco MWR 2941 Router Command Reference
address-family ipv4 (BGP)
Usage Guidelines The address-family ipv4 command replaces the match nlri and set nlri commands. The
address-family ipv4 command places the router in address family configuration mode (prompt:
config-router-af), from which you can configure routing sessions that use standard IP Version 4
address prefixes. To leave address family configuration mode and return to router configuration mode,
type exit.
The mdt keyword is used to enable the MDT SAFI under the IPv4 address family identifier. This SAFI
is used to advertise tunnel endpoints for inter-AS multicast VPN peering sessions.
In Cisco IOS Release 12.2(33)SRB and later releases, the ability to use address family configuration
under the router scope configuration mode was introduced. The scope hierarchy can be defined for BGP
routing sessions and is required to support Multi-Topology Routing (MTR). To enter the router scope
configuration mode, use the scope command, which can apply globally or for a specific VRF. When
using the scope for a specific VRF, only the unicast keyword is available.
Examples The following example places the router in address family configuration mode for the IP Version 4
address family:
Router(config)# router bgp 50000
Router(config-router)# address-family ipv4
Router(config-router-af)#
MDT Example
The following example shows how to configure a router to support an IPv4 MDT address-family session:
Router(config)# router bgp 45000
Router(config-router)# address-family ipv4 mdt
Router(config-router-af)#
Router Scope Configuration Mode Example
The following example shows how to configure the IPv4 address family under router scope
configuration mode. In this example, the scope hierarchy is enabled globally. The router enters router
scope address family configuration mode, and only multicast address prefixes for the IP Version 4
address family are specified:
Router(config)# router bgp 50000
Router(config-router)# scope global
Router(config-router-scope)# address-family ipv4 multicast
Router(config-router-scope-af)#
Related Commands Command Description
neighbor remote-as Adds an entry to the BGP or multiprotocol BGP neighbor table.