L2L VPN on 4G Networks ASA 5505's

[Alan Herriman]

Hello all,

I have been working on setting up a site to site VPN connection across a 4G network and ran into quite a few issues(specifically it doesn't stay established for very long). I've tested this same configuration in a lab environment with no issues, so I believe if it was across a more typical WAN connection there wouldn't be an issue. Is anyone aware of special configuration that needs to be done across 4G networks? I currenlty have my MTU set at 1350 per the vendor recommendation, but that is really the only "special" configuration changes I've made.

Any suggestions would be appreciated!

[Marcin Latosiewicz]

Alan,

This is not specific to 4G but rather my experience with 3G and a few others, what halped for frequent disconnects is relaxing DPD timers. Do not disable it, just tweak the settings.

As a side note, if the medium is not great the tunnel performance/operation is also going to be not-great-at-best.

M.