Date: Thu, 21 Oct 2004 16:09:39 +0200 From: Erik Mossberg <omikjam@gmail.com> To: freebsd-questions@freebsd.org Subject: GRE tunnel problem om FreeBSD 5.2.1 Message-ID: <129bb9070410210709532226ff@mail.gmail.com>
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Hello,
I have a weird problem with a GRE tunnel, the setup is as follows;
gre0: flags=b051<UP,POINTOPOINT,RUNNING,LINK0,LINK1,MULTICAST>
mtu
1476
tunnel inet 213.67.20.137 --> 194.145.248.113
inet 194.145.248.138 --> 194.145.248.137 netmask 0xfffffffc
And I've tried both w/ and w/o the link1 option mentioned in the man
page for gre.
netstat -rn -f inet:
Destination Gateway Flags Refs Use Netif
Expire
default 213.67.20.1 UGS 17 19250541 rl1
127.0.0.1 127.0.0.1 UH 1 1802 lo0
192.168.0 link#1 UC 0 0 rl0
192.168.0.54 00:04:75:c8:18:d8 UHLW 2 5683090 rl0
608
192.168.0.55 link#1 UHLW 2 140 rl0
192.168.0.91 00:0d:54:9a:d2:d1 UHLW 0 13538 rl0
1039
192.168.0.95 00:0d:88:81:fd:98 UHLW 0 766395
rl0 5
192.168.5.2 192.168.5.1 UH 0 12 gif2
194.145.248.137 194.145.248.138 UH 0 1177 gre0
213.67.20 link#2 UC 0 0 rl1
213.67.20.1 00:10:67:00:c4:39 UHLW 1 0 rl1
234
213.67.20.108 00:10:67:00:c4:39 UHLW 0 12 rl1
822
213.67.20.137 127.0.0.1 UGHS 0 136 lo0
when I try to ping 194.195.248.137 I have a 95% packet loss, but when
pinging from remote to 194.145.248.138 works just fine with no packet
loss.
tcpdump -eni rl1 shows this:
22:05:55.148354 0:10:a7:13:bf:58 0:10:67:0:c4:39 0800 122:
213.67.20.137 > 194.145.248.113: gre (frag 49403:88@752+)
22:05:56.158351 0:10:a7:13:bf:58 0:10:67:0:c4:39 0800 122:
213.67.20.137 > 194.145.248.113: gre (frag 49410:88@51176)
Sometimes the packet 1 or 2 packets goes through and gets a reply
though.
I use:
FreeBSD 5.2.1-RELEASE-p5 #3: Sun Apr 18 22:25:17 CEST 2004
omicron@fisken:/usr/obj/usr/src/sys/merltock i386
When google-ing for this problem I found this:
http://lists.freebsd.org/pipermail/freebsd-current/2004-February/02039
4.html
Which seems to be the same problem, can the bug have been brought back
afterwards?
I hope I didn't miss any info..
I will try upgrading to 5.3-RC1, seems to have been alot of fixes
since then, but I'd be glad for any information what might be the
cause of this problem.
Thanks.
Regards,
Erik
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