How to use CSM Variable DEST_UNREACHABLE_MASK

Hello,
We have some VPN customers complaining accessing SAP via the CSM. Direct access to the servers works fine. Based on the situation we think that the CSM is not passing on ICMP Unreachables (RFC 792) from the firewalls to the servers so that MSS can be lowered.
I think the variable DEST_UNREACHABLE_MASK can help solve this issue but I don't know how to use it to allow ICMP Unreachables to the servers.
Thanks,
Murtaza

By default the CSM does allow all unreachable messages.
This is what you should see :
gdufour-cat6k-2#sho mod csm 3 var | i DEST
DEST_UNREACHABLE_MASK 0xffff
If you do not have 0xffff, then it means you changed the default and should reset back to the default.
Regarding your primary issue, I would recommend a sniffer trace of the CSM portchannel and see why the vpn connection fails.
Gilles.

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Don't duplicate threads: How to use bind variables in the following query

How to use bind variables in this procedure

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Solved!
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