Question. Best practice is to configure iBGP via loopback interface. My question is, is that valid statement for scenario where two BGP peers are seperated by a firewall?
iBGP allows for a TTL=255 in the BGP packets so the added hop caused by the firewall is not a problem for the iBGP session.
if the session were eBGP you would need to tune the ebgp-multihop to take care of the FW hop.
Hope to help
Giuseppe
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