* [iproute2] a 'ip rule ...' bug?
@ 2010-03-26 12:15 thomas yang
2010-03-30 2:42 ` Stephen Hemminger
0 siblings, 1 reply; 2+ messages in thread
From: thomas yang @ 2010-03-26 12:15 UTC (permalink / raw)
To: Stephen Hemminger; +Cc: netdev
in /etc/iproute2/rt_dsfield
...
# Newer RFC2597 values
0x28 AF11
0x30 AF12
0x38 AF13
...
---in ip man page ---
ip rule add - insert a new rule
tos TOS
dsfield TOS
select the TOS value to match.
---
[root@localhost ~]# ip rule add dsfield 0x28 table 200
Error: argument "dsfield" is wrong: Failed to parse rule type
why???
how to match 'dsfield' ?
[root@localhost ~]# ip rule add tos 0x28 table 200
RTNETLINK answers: Invalid argument
(My OS is Fedora 11 : kernel-2.6.30.10-105.2.23.fc11.i586 ,
iproute-2.6.29-2.fc11.i586 ;
on my another linux box ( Fedora 7) 'ip rule' also has the same
problem to match tos and dsfield. )
--
Tom
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [iproute2] a 'ip rule ...' bug?
2010-03-26 12:15 [iproute2] a 'ip rule ...' bug? thomas yang
@ 2010-03-30 2:42 ` Stephen Hemminger
0 siblings, 0 replies; 2+ messages in thread
From: Stephen Hemminger @ 2010-03-30 2:42 UTC (permalink / raw)
To: thomas yang; +Cc: netdev
On Fri, 26 Mar 2010 20:15:30 +0800
thomas yang <lampsu@gmail.com> wrote:
> in /etc/iproute2/rt_dsfield
> ...
> # Newer RFC2597 values
> 0x28 AF11
> 0x30 AF12
> 0x38 AF13
> ...
> ---in ip man page ---
> ip rule add - insert a new rule
>
> tos TOS
> dsfield TOS
> select the TOS value to match.
> ---
Read the syntax on the man page:
ip rule [ list | add | del | flush ] SELECTOR ACTION
SELECTOR := [ from PREFIX ] [ to PREFIX ] [ tos TOS ] [ fwmark
FWMARK[/MASK] ] [ dev STRING ] [ pref NUMBER ]
There is no mention of dsfield argument.
>
> [root@localhost ~]# ip rule add dsfield 0x28 table 200
> Error: argument "dsfield" is wrong: Failed to parse rule type
>
> why???
> how to match 'dsfield' ?
>
> [root@localhost ~]# ip rule add tos 0x28 table 200
> RTNETLINK answers: Invalid argument
>
> (My OS is Fedora 11 : kernel-2.6.30.10-105.2.23.fc11.i586 ,
> iproute-2.6.29-2.fc11.i586 ;
> on my another linux box ( Fedora 7) 'ip rule' also has the same
> problem to match tos and dsfield. )
TOS field is masked by down to only 2 bits.
See include/net/route.h in kernel source.
I think the reason was that with original TOS (pre dsfield) route design,
the implementors wanted to save space.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2010-03-26 12:15 [iproute2] a 'ip rule ...' bug? thomas yang
2010-03-30 2:42 ` Stephen Hemminger
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