Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
> -----Original Message----- > From: drbd-user-bounces at lists.linbit.com [mailto:drbd-user- > bounces at lists.linbit.com] On Behalf Of Harka Gyozo SA > Sent: Saturday, February 01, 2014 1:32 AM > To: drbd-user at lists.linbit.com > Subject: [DRBD-user] drbd not working with high mtu? > > Hi! > > Anyone knows about an issue with mtu? > I tried to increase it to max ( there are two nics with a crossover cable, > so > no switch, router etc.. ). I found that max mtu supported by my card's > driver > is 7200. > ssh, ping (also with big packages), nfs works. > > drbd keeps saying:] block drbd1: [drbd1_worker/16675] sock_sendmsg time > expired, ko = ... > > If I decrease the mtu to 6000, error message stops, and I can see the > syncing > in the /proc/drbd (While the mtu is high it's stalled). > > If I increase the mtu to 6200, kernel message returns, communication > stalled. > > This is a bug? Or maybe I should increase buffer sizes in the config? > [ version: 8.3.7 (api:88/proto:86-91) ] > > > HARKA Győző > ----------- ssh, ping, nfs all will fragment packets. Try ping with a 10K size and the don't fragment switch set. Lower the size until it works. ping -M do -s 6800 -c 1 <host> Dan