Bug 17437

Summary:	pptpd рвет соединение с собщением " pptpd[4501]: GRE: xmit failed from decaps_hdlc: No buffer space available
Product:	Sisyphus	Reporter:	Александр Соловьев <dethman>
Component:	pptpd	Assignee:	Alexey Shabalin <shaba>
Status:	CLOSED NOTABUG	QA Contact:	qa-sisyphus
Severity:	normal
Priority:	P2	CC:	lakostis, shaba, silicium
Version:	unstable
Hardware:	x86
OS:	Linux

Description Александр Соловьев 2008-10-05 16:46:06 MSD

ядро std-pae 2.6.25-alt9
pppd из сизифа ppp-2.4.4-alt10.2.1
соединение проходит нормально, живет до тех пор пока не начинается интенсивный обмен трафикомOct  4 04:10:21 localhost pptpd[4501]: CTRL: Client 10.155.240.153 control connection started
Oct  4 04:10:22 localhost pptpd[4501]: CTRL: Starting call (launching pppd, opening GRE)
Oct  4 04:10:22 localhost pppd[4502]: Plugin radius.so loaded.
Oct  4 04:10:22 localhost pppd[4502]: RADIUS plugin initialized.
Oct  4 04:10:22 localhost pppd[4502]: pppd 2.4.4 started by root, uid 0
Oct  4 04:10:22 localhost pppd[4502]: Using interface ppp0
Oct  4 04:10:22 localhost pppd[4502]: Connect: ppp0 <--> /dev/pts/1
Oct  4 04:10:25 localhost pppd[4502]: local  IP address 192.168.0.1
Oct  4 04:10:25 localhost pppd[4502]: remote IP address 89.20.141.15
Oct  4 04:10:25 localhost pppd[4502]: Script /etc/ppp/ip-up finished (pid 4506), status = 0x0
Oct  4 04:11:00 localhost pptpd[4501]: GRE: xmit failed from decaps_hdlc: No buffer space available
Oct  4 04:11:00 localhost pptpd[4501]: CTRL: PTY read or GRE write failed (pty,gre)=(6,7)
Oct  4 04:11:00 localhost pppd[4502]: Modem hangup
Oct  4 04:11:00 localhost pppd[4502]: Connect time 0.6 minutes.
Oct  4 04:11:00 localhost pppd[4502]: Sent 13172588 bytes, received 261287 bytes.
Oct  4 04:11:00 localhost pppd[4502]: Connection terminated.
Oct  4 04:11:00 localhost pppd[4502]: Script /etc/ppp/ip-down finished (pid 4532), status = 0x1
Oct  4 04:11:00 localhost pppd[4502]: Exit.
Oct  4 04:11:00 localhost pptpd[4501]: CTRL: Client 10.155.240.153 control connection finished

Comment 1 Michail Yakushin 2008-10-06 11:50:12 MSD

а там случайно conntrack нигде не используется?

Comment 2 Александр Соловьев 2008-10-06 12:07:53 MSD

в целом бага не бага, скорее фича
mtu mru 1400 от нее избавляет.
единственное что может быть подумать принудительно мту давать ниже...
вобщем не критично

Comment 3 Michail Yakushin 2008-10-06 12:10:51 MSD

iptables --clamp-mss-to-pmtu