Hi all When a router receives a packet, will the TTL be decremented on the ingress interface or egress interfaces while exiting? I am raising this question due to the following case.
R1 ---------- R2 ------------- R3 R1 and R3 are EBGP peers and we should configure hops as "2" with BGP ttl security as following: neighbor X.X.X.X ttl-security hops 2 Here R2 is the only router in between which reduces the TTL. If hops is "2", the received TTL should be either 253 or above. Hence, it means the TTL is decremented on the ingress interface right? With regards Kings
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