L2TP on CSR

[wOOlf9999]

Hello Community!

I'm facing a strange problem with L2TP configured on a CSR router deployed in Azure.

All the configurations are done and I can successfully connect by an L2TP client, but then I can't ping neither network hosts on the inside network, nor any of router's interfaces. I can see packets are forwarded to and from L2TP connected host in Embedded Packet Capture, I can see successful client connection in debugging but traffic just dont flows in either direction.

Exactly the same L2TP config works normally on another CSR. At least router's interfaces are pingable.

CSR version is IOS XE 16.6 and Windows native L2TP connection is used.

Tests were done on different computers with Windows 7-8.1-10 but the result is the same.

Any hints would be greatly appreciated.

[ctm-tech]

Really late reply but I've just had a similiar issue and i think you need to look at the Azure Network Card for your CSR and enable IP Forwarding.

[wOOlf9999]

I don't have access to that system anymore, so it doesn't matter already...

But I guess it was done because S2S and AnyConnect were working OK.

Thanks for the reply anyway! :)