02-15-2019 04:44 AM - edited 02-21-2020 09:34 PM
Hello,
after updating from AnyConnect 4.6. 03049 to 4.7.00136 on a clients Cisco 881router (IOS 15.4(3)M9) we noticed the following strange behaviour:
This behaviour can be reproduced.
In the Release Notes I found
AnyConnect sometimes receives and drops packet fragments with some routers, resulting in a failure of some web traffic to pass.
To avoid this, lower the value of the MTU. We recommend 1200. The following example shows how to do this using CLI:
hostname# config t hostname(config)# group-policy DfltGrpPolicy attributes hostname(config-group-policy)# webvpn hostname(config-group-webvpn)# anyconnect mtu 1200
But there was no hint on reducing MTU size in IOS routers.
Any help on this issue is highly appreciated!
Best regards,
Joerg
02-18-2019 04:33 AM
Is there really no one who can give me a hint or share some ideas?
I do not find any hints in the log file. It just stops working...
02-21-2019 11:00 AM
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