PurposeCommand or Action
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
Step 3
10.255.255.254
Assigns the neighbor a remote autonomous system
number.
remote-as as-number
Example:
RP/0/RSP0/CPU0:router(config-bgp-nbr)# remote-as
Step 4
4713
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)#
Step 5
address-family ipv4 unicast
Specifies the peers to whom the permanent network
(path) is advertised.
advertise permanent-network
Example:
RP/0/RSP0/CPU0:router(config-bgp-nbr-af)#
Step 6
advertise permanent-network
commit
Step 7
(Optional) Displays whether the neighbor is capable of
receiving BGP permanent networks.
show bgp {ipv4 | ipv6} unicast neighbor ip-address
Example:
RP/0/RSP0/CPU0:routershow bgp ipv4 unicast
Step 8
neighbor 10.255.255.254
Enabling BGP Unequal Cost Recursive Load Balancing
Perform this task to enable unequal cost recursive load balancing for external BGP (eBGP), interior BGP
(iBGP), and eiBGP and to enable BGP to carry link bandwidth attribute of the demilitarized zone (DMZ) link.
When the PE router includes the link bandwidth extended community in its updates to the remote PE through
the Multiprotocol Interior BGP (MP-iBGP) session (either IPv4 or VPNv4), the remote PE automatically does
load balancing if the maximum-paths command is enabled.
Unequal cost recursive load balancing happens across maximum eight paths only.
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
148 OL-30423-03
Implementing BGP
Enabling BGP Unequal Cost Recursive Load Balancing
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