Cisco ASR 9000 Series Routing Configuration Guide

PurposeCommand or Action
Specifies the autonomous system number and enters the BGP
configuration mode, allowing you to configure the BGP routing
process.
router bgp as-number
Example:
RP/0/RSP0/CPU0:router(config)# router bgp
120
Step 2
Places the router in neighbor configuration mode for BGP routing
and configures the neighbor IP address as a BGP peer.
neighbor ip-address
Example:
RP/0/RSP0/CPU0:router(config-bgp)#
neighbor 172.168.40.24
Step 3
Creates a neighbor and assigns a remote autonomous system
number to it.
remote-as as-number
Example:
RP/0/RSP0/CPU0:router(config-bgp-nbr)#
remote-as 206
Step 4
Specifies either an IPv4 or IPv6 address family unicast and enters
address family configuration submode.
address-family { ipv4 | ipv6 } unicast
Example:
RP/0/RSP0/CPU0:router(config-bgp-nbr)#
address-family ipv4 unicast
Step 5
To see a list of all the possible keywords and arguments for this
command, use the CLI help (?).
Sets the next-hop attribute for all routes advertised to the specified
neighbor to the address of the local router. Disabling the calculation
next-hop-self
Example:
RP/0/RSP0/CPU0:router(config-bgp-nbr-af)#
next-hop-self
Step 6
of the best next hop to use when advertising a route causes all
routes to be advertised with the local network device as the next
hop.
commit
Step 7
Configuring BGP Community and Extended-Community Advertisements
Perform this task to specify that community/extended-community attributes should be sent to an eBGP
neighbor. These attributes are not sent to an eBGP neighbor by default. By contrast, they are always sent to
iBGP neighbors. This section provides examples on how to enable sending community attributes. The
send-community-ebgp keyword can be replaced by the send-extended-community-ebgp keyword to
enable sending extended-communities.
If the send-community-ebgp command is configured for a neighbor group or address family group, all
neighbors using the group inherit the configuration. Configuring the command specifically for a neighbor
overrides inherited values.
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
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Implementing BGP
Configuring BGP Community and Extended-Community Advertisements

Cisco ASR 9000 Series Specifications

General

Brand	Cisco
Model	ASR 9000 Series
Category	Network Router
Language	English