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Community Member

ASA 7.x SSL VPN Client MTU/MSS adjustable ?

A Customer needs to transmit UDP Pakets with a MTU/MSS between 1300 and 1400 bytes with SVC v1.1.4.176. Bug ID CSCsg92472 said the current implementation of the Virtual Adapter for SVC has a harcoded MTU/MRU of 1300 bytes. This prevents any larger packets from being successfully received.

This bug tracked a request to have this media MTU/MRU configurable. In the Release Notes of the new SVC 1.1.4.176 the Bug is shown up as fixed Issue: VA media MTU/MRU should be configurable. But where can i adjust it ? Anyone an idea how to fix this ?

Note: Not possible for the moment is the migration to Anyconnect (ASA 8.0), use TCP instead of UDP or manually lowering the MTU size.

2 REPLIES
Community Member

Re: ASA 7.x SSL VPN Client MTU/MSS adjustable ?

group-policy "name" attributes

now type "webvpn"

Now

svc mtu 1406

Hope this does helps.

Community Member

Re: ASA 7.x SSL VPN Client MTU/MSS adjustable ?

Hi Ashley,

unfortunately this works on ASA 8.0 ==> NOT on 7.2(3)...

Greetz

Sebastian

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