* ip l2tp - suspected defect using IPv6 local/remote addresses
@ 2013-09-11 18:52 Jeff Loughridge
2013-09-12 10:20 ` James Chapman
0 siblings, 1 reply; 4+ messages in thread
From: Jeff Loughridge @ 2013-09-11 18:52 UTC (permalink / raw)
To: netdev
Using IPv6 address as L2TPv3 endpoints doesn't seem to work in
iproute2 3.11. I see a cosmetic defect in the output of 'ip l2tp show
tunnel'. In addition, I can't get tunnels to function with UDP or IP
encapsulation.
root@debian:~# ip l2tp add tunnel tunnel_id 3000 peer_tunnel_id 4000
encap udp local a::1 remote a::2 udp_sport 5000 udp_dport 6000
root@debian:~# ip l2tp add session tunnel_id 3000 session_id 1000
peer_session_id 2000
root@debian:~# ip l2tp show tunnel
Tunnel 3000, encap UDP
From 127.0.0.1 to 127.0.0.1
Peer tunnel 4000
UDP source / dest ports: 5000/6000
root@debian:~#
See below for more details about my set-up. I have no problems using
IPv4 endpoints.
root@debian:~# ip addr show eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state UNKNOWN group default qlen 1000
link/ether 00:0c:29:91:cb:3c brd ff:ff:ff:ff:ff:ff
inet 5.1.0.100/24 scope global eth0
inet6 a::1/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe91:cb3c/64 scope link
valid_lft forever preferred_lft forever
root@debian:~#
root@debian:~# ip -V
ip utility, iproute2-ss130903
root@debian:~# uname -a
Linux debian 3.2.0-4-686-pae #1 SMP Debian 3.2.41-2 i686 GNU/Linux
root@debian:~#
root@debian:~# modprobe l2tp_eth
root@debian:~# lsmod | grep l2tp
l2tp_eth 12738 0
l2tp_netlink 17263 1 l2tp_eth
l2tp_core 17486 2 l2tp_netlink,l2tp_eth
Jeff L.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: ip l2tp - suspected defect using IPv6 local/remote addresses
2013-09-11 18:52 ip l2tp - suspected defect using IPv6 local/remote addresses Jeff Loughridge
@ 2013-09-12 10:20 ` James Chapman
2013-09-12 13:19 ` Ben Hutchings
0 siblings, 1 reply; 4+ messages in thread
From: James Chapman @ 2013-09-12 10:20 UTC (permalink / raw)
To: Jeff Loughridge; +Cc: netdev
On 11 September 2013 19:52, Jeff Loughridge <jeffl@alumni.duke.edu> wrote:
>
> Using IPv6 address as L2TPv3 endpoints doesn't seem to work in
> iproute2 3.11. I see a cosmetic defect in the output of 'ip l2tp show
> tunnel'. In addition, I can't get tunnels to function with UDP or IP
> encapsulation.
>
> root@debian:~# ip l2tp add tunnel tunnel_id 3000 peer_tunnel_id 4000
> encap udp local a::1 remote a::2 udp_sport 5000 udp_dport 6000
> root@debian:~# ip l2tp add session tunnel_id 3000 session_id 1000
> peer_session_id 2000
> root@debian:~# ip l2tp show tunnel
> Tunnel 3000, encap UDP
> From 127.0.0.1 to 127.0.0.1
> Peer tunnel 4000
> UDP source / dest ports: 5000/6000
> root@debian:~#
You'll need a 3.5 or later kernel for L2TP over IPv6. I see you are
using 3.2. Are you using a version of iproute2 which is not matched to
your kernel?
> See below for more details about my set-up. I have no problems using
> IPv4 endpoints.
>
> root@debian:~# ip addr show eth0
> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
> state UNKNOWN group default qlen 1000
> link/ether 00:0c:29:91:cb:3c brd ff:ff:ff:ff:ff:ff
> inet 5.1.0.100/24 scope global eth0
> inet6 a::1/64 scope global
> valid_lft forever preferred_lft forever
> inet6 fe80::20c:29ff:fe91:cb3c/64 scope link
> valid_lft forever preferred_lft forever
> root@debian:~#
> root@debian:~# ip -V
> ip utility, iproute2-ss130903
> root@debian:~# uname -a
> Linux debian 3.2.0-4-686-pae #1 SMP Debian 3.2.41-2 i686 GNU/Linux
> root@debian:~#
> root@debian:~# modprobe l2tp_eth
> root@debian:~# lsmod | grep l2tp
> l2tp_eth 12738 0
> l2tp_netlink 17263 1 l2tp_eth
> l2tp_core 17486 2 l2tp_netlink,l2tp_eth
>
> Jeff L.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: ip l2tp - suspected defect using IPv6 local/remote addresses
2013-09-12 10:20 ` James Chapman
@ 2013-09-12 13:19 ` Ben Hutchings
2013-09-13 0:46 ` Jeff Loughridge
0 siblings, 1 reply; 4+ messages in thread
From: Ben Hutchings @ 2013-09-12 13:19 UTC (permalink / raw)
To: James Chapman; +Cc: Jeff Loughridge, netdev
On Thu, 2013-09-12 at 11:20 +0100, James Chapman wrote:
> On 11 September 2013 19:52, Jeff Loughridge <jeffl@alumni.duke.edu> wrote:
> >
> > Using IPv6 address as L2TPv3 endpoints doesn't seem to work in
> > iproute2 3.11. I see a cosmetic defect in the output of 'ip l2tp show
> > tunnel'. In addition, I can't get tunnels to function with UDP or IP
> > encapsulation.
> >
> > root@debian:~# ip l2tp add tunnel tunnel_id 3000 peer_tunnel_id 4000
> > encap udp local a::1 remote a::2 udp_sport 5000 udp_dport 6000
> > root@debian:~# ip l2tp add session tunnel_id 3000 session_id 1000
> > peer_session_id 2000
> > root@debian:~# ip l2tp show tunnel
> > Tunnel 3000, encap UDP
> > From 127.0.0.1 to 127.0.0.1
> > Peer tunnel 4000
> > UDP source / dest ports: 5000/6000
> > root@debian:~#
>
> You'll need a 3.5 or later kernel for L2TP over IPv6. I see you are
> using 3.2. Are you using a version of iproute2 which is not matched to
> your kernel?
[...]
The iproute2 version number only indicates which kernel features it
supports; it is supposed to be backward-compatible. And it really
should not silently fail like this, although this may well be a bug in
the API that can't be fixed in userland...
Ben.
--
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: ip l2tp - suspected defect using IPv6 local/remote addresses
2013-09-12 13:19 ` Ben Hutchings
@ 2013-09-13 0:46 ` Jeff Loughridge
0 siblings, 0 replies; 4+ messages in thread
From: Jeff Loughridge @ 2013-09-13 0:46 UTC (permalink / raw)
To: Ben Hutchings; +Cc: James Chapman, netdev
I confirmed IPv6 endpoints work using a 3.5 kernel. Thanks, guys.
On Thu, Sep 12, 2013 at 9:19 AM, Ben Hutchings
<bhutchings@solarflare.com> wrote:
> On Thu, 2013-09-12 at 11:20 +0100, James Chapman wrote:
>> On 11 September 2013 19:52, Jeff Loughridge <jeffl@alumni.duke.edu> wrote:
>> >
>> > Using IPv6 address as L2TPv3 endpoints doesn't seem to work in
>> > iproute2 3.11. I see a cosmetic defect in the output of 'ip l2tp show
>> > tunnel'. In addition, I can't get tunnels to function with UDP or IP
>> > encapsulation.
>> >
>> > root@debian:~# ip l2tp add tunnel tunnel_id 3000 peer_tunnel_id 4000
>> > encap udp local a::1 remote a::2 udp_sport 5000 udp_dport 6000
>> > root@debian:~# ip l2tp add session tunnel_id 3000 session_id 1000
>> > peer_session_id 2000
>> > root@debian:~# ip l2tp show tunnel
>> > Tunnel 3000, encap UDP
>> > From 127.0.0.1 to 127.0.0.1
>> > Peer tunnel 4000
>> > UDP source / dest ports: 5000/6000
>> > root@debian:~#
>>
>> You'll need a 3.5 or later kernel for L2TP over IPv6. I see you are
>> using 3.2. Are you using a version of iproute2 which is not matched to
>> your kernel?
> [...]
>
> The iproute2 version number only indicates which kernel features it
> supports; it is supposed to be backward-compatible. And it really
> should not silently fail like this, although this may well be a bug in
> the API that can't be fixed in userland...
>
> Ben.
>
> --
> Ben Hutchings, Staff Engineer, Solarflare
> Not speaking for my employer; that's the marketing department's job.
> They asked us to note that Solarflare product names are trademarked.
>
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-09-13 0:47 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2013-09-11 18:52 ip l2tp - suspected defect using IPv6 local/remote addresses Jeff Loughridge
2013-09-12 10:20 ` James Chapman
2013-09-12 13:19 ` Ben Hutchings
2013-09-13 0:46 ` Jeff Loughridge
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