Ebgp Peer Group Example; Bgp Community With Route Maps Examples - Enterasys Security Router X-PeditionTM User Manual

Configuring BGP Peer Groups
XSR(config-router)#neighbor IBGP filter-list 1 out
XSR(config-router)#neighbor IBGP filter-list 2 in
XSR(config-router)#neighbor 192.168.57.3 peer-group IBGP
XSR(config-router)#neighbor 192.168.57.4 peer-group IBGP
XSR(config-router)#neighbor 192.168.57.5 peer-group IBGP
XSR(config-router)#neighbor 192.168.57.5 filter-list 3 in

EBGP Peer Group Example

Peer group EBGP in this example is defined not using the
rendering it an EBGP peer group by definition. Each peer group member is supplied with its
respective AS number separately so the peer group is composed of members from AS's 25, 35, and
45. All peer group members have route map 5 as an outbound route map and filter-list 4 as an
outbound filter list and all share incoming filter list 57 except neighbor 192.168.57.10.
XSR(config)#router bgp 13
XSR(config-router)#neighbor external-peers peer-group
XSR(config-router)#neighbor external-peers route-map 5 out
XSR(config-router)#neighbor external-peers filter-list 4 out
XSR(config-router)#neighbor external-peers filter-list 57 in
XSR(config-router)#neighbor 192.168.57.2 remote-as 25
XSR(config-router)#neighbor 192.168.57.2 peer-group external-peers
XSR(config-router)#neighbor 192.168.57.9 remote-as 35
XSR(config-router)#neighbor 192.168.57.9 peer-group external-peers
XSR(config-router)#neighbor 192.168.57.10 remote-as 45
XSR(config-router)#neighbor 192.168.57.10 peer-group external-peers
XSR(config-router)#neighbor 192.168.57.10 filter-list 45 in

BGP Community with Route Maps Examples

This section illustrates three examples of BGP communities with route maps. First, route map 111
is applied to outgoing updates for neighbor 192.168.57.50. The routes that pass ACL 1 share the
no-export community attribute while other routes are advertised as usual. This community value
automatically bars BGP speakers in AS 20 from advertising those routes.
XSR(config)#router bgp 10
XSR(config-router)#neighbor 192.168.57.50 remote-as 20
XSR(config-router)#neighbor 192.168.57.50 send-community
XSR(config-router)#neighbor 192.168.57.50 route-map 111 out
XSR(config-router)#route-map 111 10 permit
XSR(config-route-map)#match ip address 1
XSR(config-route-map)#set community no-export
XSR(config-route-map)#route-map 111 20 permit
XSR(config-route-map)#match ip address 2
Secondly, route map 111 is matched with outgoing updates for neighbor 192.168.57.90. All routes
originating from AS 7 have the community values 50 50 added to their existing values with other
routes advertised as usual.
XSR(config)#router bgp 20
XSR(config-router)#neighbor 192.168.57.90 remote-as 10
6-26 Configuring the Border Gateway Protocol
neighbor remote-as
command,