dropping UDP packets in openconnect VPN

David Woodhouse dwmw2 at infradead.org
Wed Aug 17 15:13:07 EDT 2011


On Wed, 2011-08-17 at 11:49 -0700, er0ck wrote:
> 
> plain old traceroutes to the afs servers work just fine.  so i'm back
> to square-one trying to figure out why afs is so slow.
> thanks for your attempts to help David, this appears to be an afs problem.
> i'll have to sit down and do some benchmarking on the vpn in general
> and compare to afs. 

Run tcpdump on both ends and compare. Perhaps there is some systematic
packet loss? I know little of RxRPC; what happens if full-sized packets
are lost? Does it wait a while and then send smaller ones? Is that
consistent with what you're seeing?

Try reducing the MTU on your tun0 device?

-- 
dwmw2




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