iBGP Neighbors

iBGP peers usually use loopback interfaces for their RID to achieve higher availability within a single AS, this allows for redundant routes to the routers loopback address to work through other internal routers if a backup path were available.

Configuration does not define if a neighbor is internal or external, instead BGP will look at its configured AS and compare it to the remote as configured on the peer to make that determination.

iBGP or internal BGP refers to BGP peerings within the same AS.

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