Information Technology Reference
In-Depth Information
Step 10: Move R3 from Member AS 65000 to Member AS 100
Move R3 from member AS 65000 to member AS 100, which is service-affecting on the
router that originates prefixes. The prefix 192.168.200.0/24 is temporarily unavailable
during the configuration change. Example 8-102 shows the new BGP configurations on R3.
Example 8-102
New BGP Configurations on R3
router bgp 100
no synchronization
bgp router-id 192.168.100.3
bgp log-neighbor-changes
bgp confederation identifier 100
bgp confederation peers 65000
network 192.168.200.0
neighbor Internal peer-group
neighbor Internal remote-as 100
neighbor Internal update-source Loopback0
neighbor 192.168.100.1 peer-group Internal
neighbor 192.168.100.2 peer-group Internal
no auto-summary
Example 8-103 shows the current BGP RIB on R3. Note that the next hop for 172.16.0.0
is 192.168.100.1 because R3 learned the route from R2, which in turn learned it from R4
and R5.
Example 8-103
BGP RIB on R3
R3#show ip bgp
BGP table version is 5, local router ID is 192.168.100.3
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*>i172.16.0.0 192.168.100.1 0 100 0 (65000) 200 i
*> 192.168.200.0 0.0.0.0 0 32768 i
*>i192.168.201.0 192.168.100.6 0 100 0 i
*>i192.168.202.0 192.168.100.7 0 100 0 i
Example 8-104 shows the current BGP RIB on R1.
Example 8-104
BGP RIB on R1
R1#show ip bgp
BGP table version is 17, local router ID is 192.168.100.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure
continues
