Configuring Next Hop Processing - Motorola BSR 2000 Configuration And Management Manual

Release 1.0
Example
The commands in the following example set the maximum prefix to 900:

Configuring Next Hop Processing

The BGP next hop attribute is the IP address of the next hop. The next hop is usually
the IP address of a neighbor you specified with the neighbor remote-as command.
You can also use the neighbor next-hop-self command to specify the router itself.
Use the neighbor remote-as command in Router Configuration mode to configure
next hop processing:
MOT(config-bgp)#neighbor {<A.B.C.D> | <WORD>} remote-as <1-65535>
where:
In the network shown in
172.56.0.0 to Router Miami with a next hop attribute of 172.56.20.1. Router Miami
advertises network 120.80.0.0 to Router San Francisco with a next hop attribute of
172.56.20.2.
In BGP, the next hop of EBGP-learned routes is carried without modification in IBGP.
Because of this BGP rule, Router Miami advertises 172.56.0.0 to its IBGP peer
(Router New York) with a next hop attribute of 172.56.20.1. As a result, according to
Router New York, the next hop to reach 172.56.0.0 is 172.56.20.1 instead of
130.60.20.1 via an IGP. Router New York drops packets destined for 171.56.0.0, if
this next hop 172.56.20.1 is not reachable via IGP.
526360-001-00 Rev. B
WORD is the name of the BGP peer group.
1-65536 is the maximum number of prefixes allowed from this neighbor.
1-100 is the percent of the maximum at which the router generates a warning
message. The default is 75 percent.
warning-only gives a warning message when the limit is exceeded instead of
shutting down the peer.
MOT(config)#router bgp 100
MOT(config-bgp)#neighbor 1.1.1.1 maximum-prefix 900
A.B.C.D is the IP address of the neighbor.
WORD is the name of the BGP peer group.
1-65535 is the AS number of the neighbor AS.
Figure 12-7, Router San Francisco advertises network
MGBI
Configuring BGP
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