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(usagi-users 03158) Re: cannot always delete IPv6 route entry in Fedora core 2 and Core 3
- To: usagi-users@xxxxxxxxxxxxxx
- Subject: (usagi-users 03158) Re: cannot always delete IPv6 route entry in Fedora core 2 and Core 3
- From: Pavlin Radoslavov <pavlin@xxxxxxxx>
- Date: Wed, 08 Dec 2004 21:41:16 -0800
- In-reply-to: Message from Liang Qin <lqin@sce.carleton.ca> of "Wed, 01 Dec 2004 14:58:28 EST." <41AE2264.4070100@sce.carleton.ca>
- Reply-to: usagi-users@xxxxxxxxxxxxxx
- Resent-date: Thu, 9 Dec 2004 14:46:13 +0900
- Resent-from: sekiya@xxxxxxxxxxxxxx
- Resent-message-id: <200412091446.FMLAAB28319.usagi-users@linux-ipv6.org>
- Resent-to: usagi-users@xxxxxxxxxxxxxx (moderated)
Has anybody else ran into the same problem?
I was able to replicate the problem and I am curious if somebody has
a solution for it.
Thanks,
Pavlin
> Hi there,
>
> I'm a Ph. D student at Carleton University, Canada. I've developing
> routing protocols
> on Linux.
>
> Recently when I move code from redhat 9.0 to Fedora Core 2 and 3, I
> found out sometimes
> the IPv6 route entry added previously cannot be deleted successfully.
> Finally I traced down to
> the system call to the kernel and did the following experiments:
>
> [root@localhost lqin]# route -A inet6
> Kernel IPv6 routing table
> Destination Next
> Hop Flags Metric Ref Use Iface
> ::1/128
> * U 0 310 0 lo
> fe80::206:25ff:fea9:b1f9/128
> * U 0 0 0 lo
> fe80::/64
> * U 256 0 0 eth1
> fec0::/128
> fec0:: UC 0 18 0 eth1
> fec0::206:25ff:fea9:b1f9/128
> * U 0 21 0 lo
> fec0::/64
> * U 256 0 0 eth1
> ff00::/128
> ff00:: UC 0 15 0 eth1
> ff00::/8
> * U 256 0 0 eth1
> */0
> * UD 256 0 0 eth1
> */0
> * U 1024 0 0 eth1
> [root@localhost lqin]# ip -6 route add fec0::206:25ff:fea9:b1fd/128 dev
> eth1
> [root@localhost lqin]# netstat --inet6 -rn
> Kernel IPv6 routing table
> Destination Next
> Hop Flags Metric Ref Use Iface
> ::1/128
> :: U 0 343 0 lo
> fe80::206:25ff:fea9:b1f9/128
> :: U 0 0 0 lo
> fe80::/64
> :: U 256 0 0 eth1
> fec0::206:25ff:fea9:b1f9/128
> :: U 0 24 0 lo
> fec0::206:25ff:fea9:b1fd/128
> :: U 1024 0 0 eth1
> fec0::/64
> :: U 256 0 0 eth1
> ff00::/8
> :: U 256 0 0 eth1
> fec0::/64
> :: U 256 0 0 eth1
> ff00::/8
> :: U 256 0 0 eth1
> ::/0
> :: UD 256 0 0 eth1
> ::/0
> :: U 1024 0 0 eth1
> ::/0
> :: U 1024 0 0 eth1
> [root@localhost lqin]# ip -6 route del fec0::206:25ff:fea9:b1fd/128 dev
> eth1
> [root@localhost lqin]# netstat --inet6 -rn
> Kernel IPv6 routing table
> Destination Next
> Hop Flags Metric Ref Use Iface
> ::1/128
> :: U 0 391 0 lo
> fe80::206:25ff:fea9:b1f9/128
> :: U 0 0 0 lo
> fe80::/64
> :: U 256 0 0 eth1
> fec0::/128
> fec0:: UC 0 6 0 eth1
> fec0::206:25ff:fea9:b1f9/128
> :: U 0 27 0 lo
> fec0::206:25ff:fea9:b1fd/128
> :: U 1024 0 0 eth1
> fec0::/64
> :: U 256 0 0 eth1
> fec0::/64
> :: U 256 0 0 eth1
> ff00::/128
> ff00:: UC 0 6 0 eth1
> ff00::/8
> :: U 256 0 0 eth1
> ::/0
> :: UD 256 0 0 eth1
> ::/0
> :: U 1024 0 0 eth1
>
> It will be successfully if I use command twice in very short time (ine 1
> or 2 seconds)
> ip -6 route del fec0::206:25ff:fea9:b1fd/128 dev eth1
>
> Here eth1 is a wireless interface
>
>
> I tested on two Dell tops with Fedora core 2 and 3 with the same
> problem, but on redhat 9.0,
> there is no such problem at all (even with the routing protocol which I
> work on).
>
> BTW, I've sent the same question to netdev@xxxxxxxxxxx but don't
> receive reply.
>
>
> Thanks in advance!
>
> Liang Qin