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loca995
newbie
Topic Author
Posts: 41
Joined: Wed Sep 01, 2021 10:31 am
Location: Italy

IPSec phase2 becomes corrupted over PPPoE interface

Tue Oct 12, 2021 6:45 pm

Hello everyone,
It's been a while I am experiencing a problem with IPSEC.
A few weeks ago, I opened another discussion because I thought it could be a problem with GRE, but after many tests and other users suggestions, I discovered the problem is located on IPSEC phase2.

Basically, when a PPPoE interface disconnects and re-connects, the IPSEC phase2 stop working.
I made a test enviroment with one RB2011 and one RB3011.
Edit 1
On each RB, I have a single WAN link, and both WAN lines use a PPPoE interface. The PPPoE interface's local address is the public IP address

I am able to recreate the problem everytime I want: if I disable and re-enable the PPPoE interface on the RB3011, the phase2 stop working.
What is funny is that if I do the same on the RB2011, the phase2 doesn't have any problem.

I attached the two configurations. It's a very simple configuration, could you please take a look?

The only difference between the two setup is:
on the RB2011 the internet connection is made with a wireless link, on the RB3011 the internet connection is made with a FTTC Modem in bridge mode. But for the routerboards there should not be any difference, it should be transparent...

Any suggestion would be really appreciated...
Thanks
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Last edited by loca995 on Fri Oct 15, 2021 1:58 pm, edited 3 times in total.

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