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MTU for IKEv2

tsipoulanis
Level 1
Level 1

Hello everyone,

i have to sites with S2S VPN, IPsec IKEv2.
one time per 2-5 Days(not specific) we loose the connection between the Sites.

that happen during the weekend (without so much traffic) also during the working days.

routers are running the "c800-universalk9-mz.SPA.155-3.M.bin" Version, which is not the recommended Version from Cisco.
do i have to take care of the MTU for the tunnel Interface?
ip mtu 1400
ip tcp adjust-mss 1360

???

also, some days in the past, when we lost the connection, i connect from one site to the router and i could find all the Static Router.
2 times, i received the request for the username and the password and could not log-in for 20-40 minutes with the correct credentials.

do you think has something to do with the Performance of the Devices?
has something to do with the MTU??
is it possible to check it with some way?

Best Regards,
Thomas

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