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IPSEC MTU size should be 1500 or 1400 with ipsec 60 overhead?

Our l2l vpn connections have different MTU sizes. The VPn connection is established but I only get inbound traffice but no outbound traffic. Should the path mtu be 1400 or 150 for the VPN?

1400, ipsec overhead 60, media mtu 1500

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Re: IPSEC MTU size should be 1500 or 1400 with ipsec 60 overhead

Just keep pinging the other end ip address with ping x.x.x.x -f -l 1500.

Keep decreasing it untill you get replies back. The time you get reply is probably the MTU you would want to use.

HTH

Hoogen

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