Question:
I have configured a test Catalyst Switches Price lab with BGP. I
have two different AS setup with dual connections between the systems. I
configured the loopbacks and update-source between the AS but BGP did not
become active until I changed the ebgp-multihop count from default and set hop
count to 2. My question is, is there a troubleshooting command I can use that
will show me that the ebgp-multihop is not set correctly.
Answer:
If the ebgp-multihop is missing for an
indirectly-connected eBGP neighbor, at the bottom of the show ip bgp neighbor
X.X.X.X you will find these lines:
[ ... cut ... ]
Connections established 0; dropped 0
Last reset never
External BGP neighbor not directly connected.
No
active TCP connection
There is the indication of the eBGP peer
not being directly connected.
You may also be interested in reading the
following thread about the ebgp-multihop and disable-connected-check that can
be used specifically for loopback peerings between directly connected eBGP
neighbors like yours.
For more Cisco Switch news about Price ans Specification, you can click here.
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