Information Technology Reference
In-Depth Information
A potential forwarding loop might form if
next-hop-self
is configured on R1 for the session
between R1 and R4. As R5 learns prefix 192.168.201.0 from R1 with the BGP next hop
reset as R1, a loop is formed when R5 is an IGP next hop for the prefix from R1. However,
this loop is prevented when R5 is moved out of the forwarding paths.
CAUTION
Figure 8-6
Current Network Topology
AS 200
R8
172.16.0.0/16
AS 65001
AS 100
R1
R4
192.168.201.0/24
192.168.200.0/24
R6
R3
192.168.202.0/24
R2
R5
R7
Confederation 100
Step 7: Move R5 from Member AS 100 to Member AS 65001 and Put R5 Back in the
Forwarding Paths
Move R5 from member AS 100 to member AS 65001. The warning messages on R4, R6,
and R7 about the wrong AS should now stop. Example 8-35 shows the new BGP
configurations on R5.
Example 8-35
BGP Configurations on R5
router bgp 65001
no synchronization
bgp router-id 192.168.100.5
bgp log-neighbor-changes
continues
