Motorola BSR 2000, Руководство по настройке и управлению

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BSR 2000 Configuration and Management Guide Release 1.0
12-54 MGBI 526360-001-00 Rev. B
MOT(config)#ip as-path access-list 2 deny _690
MOT(config)#ip as-path access-list 2 permit.*
The next command, executed in Global Configuration mode, enables BGP and
specifies an AS.
MOT(config)#router bgp 100
The following commands, executed in Router Configuration mode, define two
neighbor peers, and assign the AS path list to one of the neighbor BGP peers. This
indicates that outbound routes have the conditions defined in AS path access list 1
applied to it.
MOT(config-bgp)#neighbor 156.30.10.22 remote-as 200
MOT(config-bgp)#neighbor 160.25.15.10 remote-as 300
MOT(config-bgp)#neighbor 156.30.10.22 filter-list 1 out
Creating a Community List
Peers exchange the BGP community attributes when they exchange reachability
information with each other. A community is a group of destinations that share a
common policy. Based on community, you can control the routing information a BGP
speaker accepts, prefers, or distributes to other neighbors.
You can use the following predefined well-known community attributes with the
set-community command in a route map:
■
no-export
■
no-advertise
■
no-sub-confed export
In addition, you can define a community number to advertise to a specific community
number. All destinations belong to the general Internet community by default.
Use the no export keyword to disallow advertising to EBGP peers. This is useful in a
network that uses IBGP heavily but does not want to share its internal routing entries
with its EBGP peers. Use the
no-advertise keyword to prevent routes from being
propagated beyond the local router, even to IBGP peers.