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Re: High CPU load when PPPoE sessions disconnects

Mon Jan 14, 2019 6:48 pm

I think this problem appeared in some recent versions of ROS.
It definitely exists on 6.35.4 and 6.38.1.

When we have network outages, some PPPoE sessions are disconnecting with 'peer not responding' errors.
In this moments CCR CPUs are 100% utilised, so than router almost stop passing any traffic.

This can continue for some minutes. Router looses OSPF neighbors, and it's all becomes a catastrophe!
It number of disconnecting sessions is over 200-300 it collapses 100%.

Seeing this on several different CCRs.
I have de same Problem In CCR1072 V6.43.8
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Re: High CPU load when PPPoE sessions disconnects

Wed Jan 16, 2019 4:02 pm

We have also the same problem. I changed all masquerade rules to src nat rules but the CCR1036 (pppoe server with ~1000 sessions) went down again, when the router lost ~200 sessions due to a failing link... I decided to build up a ospf system with redundant pppoe server (2 routers without connection tracking) + 2 routers for bgp with connection tracking.

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