3Com 3C13636 Configuration Manual page 697

3Com Router 3000 Ethernet Family
Configuration Guide
[Router A-bgp] group ex external
[Router A–bgp] peer 192.1.1.2 group ex as-number 200
[Router A–bgp] network 1.0.0.0 255.0.0.0
2) Configure Router B:
[Router B] interface serial 2/0/0
[Router B-Serial2/0/0] ip address 192.1.1.2 255.255.255.0
[Router B-Serial2/0/0] interface serial 1/0/0
[Router B-Serial1/0/0] ip address 193.1.1.2 255.255.255.0
[Router B-Serial1/0/0] quit
[Router B] bgp 200
[Router B-bgp] group ex external
[Router B-bgp] peer 192.1.1.1 group ex as-number 100
[Router B-bgp] peer in next-hop-local
[Router B-bgp] group in internal
[Router B-bgp] peer 193.1.1.1 group in
3) Configure Router C:
[Router C] interface serial 2/0/0
[Router C-Serial2/0/0] ip address 193.1.1.1 255.255.255.0
[Router C-Serial2/0/0] interface serial 1/0/0
[Router C-Serial1/0/0] ip address 194.1.1.1 255.255.255.0
[Router C-Serial1/0/0] quit
[Router C] bgp 200
[Router C-bgp] group rr internal
[Router C-bgp] reflect between-clients
[Router C-bgp] peer rr reflect-client
[Router C-bgp] peer 193.1.1.2 group rr
[Router C-bgp] peer 194.1.1.2 group rr
4) Configure Router D:
[Router D] interface serial 1/0/0
[Router D-Serial1/0/0] ip address 194.1.1.2 255.255.255.0
[Router D-Serial1/0/0] quit
[Router D] bgp 200
[Router D-bgp] group in internal
[RouterD-bgp] peer 194.1.1.1 group in
Using the display bgp routing command on Router B, you can see that Router B has
known the existence of network 1.0.0.0.
Using the display bgp routing command on Router D, you can see that Router D also
knows the existence of network 1.0.0.0.
3Com Corporation
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Chapter 6 BGP Configuration