???? Debug Logs on R2:

nginx

CopyEdit

Received OPEN from 10.0.1.1...

Router ID: 10.0.1.1, AS: 100

Received OPEN from 10.0.2.2...

Router ID: 10.0.2.2, AS: 200

The OPEN message exchanged during BGP neighbor establishment contains:

Router ID of the peer

AS number

Hold time

Capabilities

From the logs:

R2 received R1’s OPEN message with:

Router ID = 10.0.1.1

AS = 100

R2 ' s own OPEN message shows:

Router ID = 10.0.2.2

AS = 200

This gives us the exact matching required.

Official Huawei Extract:

" In BGP, the OPEN message contains the router ID and AS number of the sender. These values are exchanged during session establishment and are visible via debugging logs or display bgp peer outputs. "

— [Huawei HCIA-Datacom Guide – BGP Peer Establishment and Debugging]