We are getting a lot of Rx errors on one of our L2TP connections. Data still gets through, slowly, but with this many errors and I’m not sure I can to depend on that link.
We’ve traded out patch cables on both ends, just not sure whats going on here.
Anybody ever have this kind of problem before?
We’re running 3.25.
I have 5 or 6 l2tp tunnels on 3.25. Only one of them shows this behavior as well. My assumption is that there is packet loss on that one. It’s only on RX as well. I can’t check the other end because it doesnt have the counters yet (3.17).
I wonder if the packet loss causes encryption to get out of sync or something. I am still investigating… if you find out anything please update me and I will do the same.
Thank you.
We changed the interfaces to a PPTP client and the error rate went to zero, dropped the MRU and the throughput went up.
May be upstream provider is eating L2TP traffic for some reason?
i have a feeling its because l2tp packets are UDP, and packets are out of order as they arrive. PPTP is using GRE and TCP and I think that handles packet reordering at a lower level.
What type of connection is the client on, dsl or cable modem ?
Sam
is the client side under any queueing ?
There is no queuing on either one, I know that. I’m not sure what the connection type is, router is in another state. I have a call in with that question and will get back to you as soon as I have an answer.
The routers are on bonded T1’s.
sounds like packet reordering issues. can you disable one T1 and see if that fixes it ?