BGP Neighbor Adjacency States in Lab

We can see the bgp states with 'debug ip bgp events' command.

*Mar 1 01:48:40.675: BGP: 10.1.12.1 went from Idle to Active

*Mar 1 00:50:27.127: BGP: 10.1.12.1 open active, local address 10.1.12.2

*Mar 1 00:50:27.155: BGP: 10.1.12.1 went from Active to OpenSent

*Mar 1 00:50:27.155: BGP: 10.1.12.1 sending OPEN, version 4, my as: 200, holdtime 180 seconds

*Mar 1 00:50:27.159: BGP: 10.1.12.1 send message type 1, length (incl. header) 45

*Mar 1 00:50:27.187: BGP: 10.1.12.1 rcv message type 1, length (excl. header) 26

*Mar 1 00:50:27.187: BGP: 10.1.12.1 rcv OPEN, version 4, holdtime 180 seconds

*Mar 1 00:50:27.191: BGP: 10.1.12.1 rcv OPEN w/ OPTION parameter len: 16

*Mar 1 00:50:27.191: BGP: 10.1.12.1 rcvd OPEN w/ optional parameter type 2 (Capability) len 6

*Mar 1 00:50:27.191: BGP: 10.1.12.1 OPEN has CAPABILITY code: 1, length 4

*Mar 1 00:50:27.191: BGP: 10.1.12.1 OPEN has MP_EXT CAP for afi/safi: 1/1

*Mar 1 00:50:27.191: BGP: 10.1.12.1 rcvd OPEN w/ optional parameter type 2 (Capability) len 2

*Mar 1 00:50:27.195: BGP: 10.1.12.1 OPEN has CAPABILITY code: 128, length 0

*Mar 1 00:50:27.195: BGP: 10.1.12.1 OPEN has ROUTE-REFRESH capability(old) for all address-families

*Mar 1 00:50:27.195: BGP: 10.1.12.1 rcvd OPEN w/ optional parameter type 2 (Capability) len 2

*Mar 1 00:50:27.195: BGP: 10.1.12.1 OPEN has CAPABILITY code: 2, length 0

*Mar 1 00:50:27.195: BGP: 10.1.12.1 OPEN has ROUTE-REFRESH capability(new) for all address-families

BGP: 10.1.12.1 rcvd OPEN w/ remote AS 200

*Mar 1 00:50:27.195: BGP: 10.1.12.1 went from OpenSent to OpenConfirm

*Mar 1 00:50:27.195: BGP: 10.1.12.1 went from OpenConfirm to Established

*Mar 1 00:50:27.195: %BGP-5-ADJCHANGE: neighbor 10.1.12.1 Up

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How to setup AWS VPC Peering (VPC to VPC)

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Access-list at SVI

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