Hi, I'm trying to use "ip tcp mss adjustment" on a GRE Tunnel to force end nodes to reduce their packet size. I've confirgured "ip tcp adjust-mss 1400" on both side of the GRE Tunnel, but the router is still sending ICMP Type 3, code 4 with Next hop MTU=1476. I was expecting to see a smaller Next hop like MTU 1444 bytes. Please advise.
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