Subject: Re: IPv6 PMTUD broken
To: Jun-ichiro itojun Hagino <itojun@itojun.org>
From: Ronald van der Pol <Ronald.vanderPol@rvdp.org>
List: current-users
Date: 06/10/2004 07:21:16
On Thu, Jun 10, 2004 at 10:49:09 +0900, Jun-ichiro itojun Hagino wrote:
> with sendto() (without connnect()) on udp, udp6_ctlinput passes 0
> as the last argument to icmp6_mtudisc_update(). in that case, unless
> you have tons of (> 256) routing entries created PMTUD, path MTU
> discovery should work.
No, I don't. Below is the current routing table. I will try to make a
test setup at work today and see if I can reproduce the problem there.
rvdp
bones.rvdp.org$ netstat -nr
Routing tables
Internet:
Destination Gateway Flags Refs Use Mtu Interface
default 10.0.0.1 UGS 0 0 - ex0
10/25 link#8 UC 2 0 - ex0
10.0.0.1 00:00:24:c0:7b:f4 UHLc 1 0 - ex0
10.0.0.2 00:00:c5:0d:e5:97 UHLc 2 1305 - ex0
10.0.0.36 127.0.0.1 UGHS 0 0 33196 lo0
127/8 127.0.0.1 UGRS 0 0 33196 lo0
127.0.0.1 127.0.0.1 UH 4 52 33196 lo0
XNS:
Destination Gateway Flags Refs Use Mtu Interface
ISO:
Destination Gateway Flags Refs Use Mtu Interface
X.25:
Destination Gateway Flags Refs Use Mtu Interface
AppleTalk:
Destination Gateway Flags Refs Use Mtu Interface
Internet6:
Destination Gateway Flags Refs Use Mtu Interface
::/104 ::1 UGRS 0 0 - lo0 =>
::/96 ::1 UGRS 0 0 - lo0 =>
default fe80::200:24ff:fec0:7bf4%ex0 UG 0 55 - ex0
::1 ::1 UH 12 44 33196 lo0
::127.0.0.0/104 ::1 UGRS 0 0 - lo0
::224.0.0.0/100 ::1 UGRS 0 0 - lo0
::255.0.0.0/104 ::1 UGRS 0 0 - lo0
::ffff:0.0.0.0/96 ::1 UGRS 0 0 - lo0
2001:888:1777::/64 link#8 UC 3 0 - ex0
2001:888:1777::2 00:00:c5:0d:e5:97 UHLc 0 25 - ex0
2001:888:1777:0:200:c5ff:fe0d:e597 00:00:c5:0d:e5:97 UHLc 1 470 - ex0
2001:888:1777:0:230:65ff:fe29:3fc8 00:30:65:29:3f:c8 UHLc 2 332 - ex0
2001:888:1777:0:260:8ff:fed1:a403 00:60:08:d1:a4:03 UHL 1 0 - lo0
2002::/24 ::1 UGRS 0 0 - lo0
2002:7f00::/24 ::1 UGRS 0 0 - lo0
2002:e000::/20 ::1 UGRS 0 0 - lo0
2002:ff00::/24 ::1 UGRS 0 0 - lo0
fe80::/10 ::1 UGRS 0 0 - lo0
fe80::%lo0/64 fe80::1%lo0 U 0 0 - lo0
fe80::1%lo0 link#1 UHL 0 0 - lo0
fe80::%ex0/64 link#8 UC 1 0 - ex0
fe80::200:24ff:fec0:7bf4%ex0 00:00:24:c0:7b:f4 UHLc 1 3 - ex0
fe80::260:8ff:fed1:a403%ex0 00:60:08:d1:a4:03 UHL 0 0 - lo0
fec0::/10 ::1 UGRS 0 0 - lo0
ff01::/32 ::1 UC 0 0 - lo0
ff02::%lo0/32 ::1 UC 0 0 - lo0
ff02::%ex0/32 link#8 UC 0 0 - ex0
bones.rvdp.org$