3Com 10014299 manual Configure Router D Configure BGP peers

474CHAPTER 30: CONFIGURING BGP

[RouterC-Serial0]ip address 193.1.1.1 255.255.255.0

dConfigure Serial 1

[RouterC-Serial0] interface serial 1

[RouterC-Serial1]ip address 194.1.1.1 255.255.255.0

[RouterC-Serial1] ospf enable area 0

4Configure Router D:

aConfigure BGP peers

[RouterD] bgp 200 [RouterA-bgp] undo synchronization

[RouterD-bgp]peer 194.1.1.1 as-number 200

bEnable OSPF

[RouterD] ospf enable

cConfigure Serial 0

[RouterD-ospf] interface serial 0 [RouterD-Serial0] ip address 194.1.1.2 255.255.255.0

[RouterD-Serial0] ospf enable area 0

View BGP routing table on Router B with display bgp routing-tablecommand. Note that Router B knows that network 1.0.0.0 exists.

[RouterB] display bgp routing-table
network	next hop	metric	localpref
1.0.0.0	192.1.1.1	0

View BGP routing table on Router C with display bgp routing-tablecommand. Note that Router C knows that network 1.0.0.0 exists.

[RouterD] display bgp routing-table

network	next hop	metric	llocalpref
1.0.0.0	194.1.1.1	0	100

Configuring BGP Path This example describes how the administrator manages the routing with the BGP Selection attribute. All routers are configured with BGP. OSPF is used by IGP in AS200.

Router A is in AS100, functioning as the BGP peer of Router B and Router C in AS200. When Router B and Router C run IBGP to Router D, Router D is also in AS200.