[LARTC] setting promisc with iproute2

[LARTC] setting promisc with iproute2

[Padraig Brady]

What's the equivalent of `ifconfig eth0 promisc`
using the ip command. The documentation says
that promisc is an obsolete flag?

thanks,
Pádraig.

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Re: [LARTC] setting promisc with iproute2

[Martin A. Brown]

Helo Pádraig,

 : What's the equivalent of `ifconfig eth0 promisc`
 : using the ip command. The documentation says
 : that promisc is an obsolete flag?

I have been able to use the following command to alter device flags.

    ip link set dev eth0 promisc on

See:

  http://linux-ip.net/html/tools-ip-link.html#tools-ip-link-set

Perhaps somebody with deeper kernel knowledge can explain the comment
about the obsolescence of the promisc (and allmulti) flags.  (I use the
word obsolescence instead of obsolete because I'm still able to use these
flags on my recent 2.4 kernels.)  I, too, have wondered about this note.

See the bottom of this page from the ip-cref manual for reference.

  http://linux-ip.net/gl/ip-cref/node10.html

Can anybody provide some clarification of this cautionary note?

-Martin

-- 
Martin A. Brown --- SecurePipe, Inc. --- mabrown@securepipe.com

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Re: [LARTC] setting promisc with iproute2

[Padraig Brady]

Martin A. Brown wrote:
> Helo Pádraig,
> 
>  : What's the equivalent of `ifconfig eth0 promisc`
>  : using the ip command. The documentation says
>  : that promisc is an obsolete flag?
> 
> I have been able to use the following command to alter device flags.
> 
>     ip link set dev eth0 promisc on
> 
> See:
> 
>   http://linux-ip.net/html/tools-ip-link.html#tools-ip-link-set

Hmm I tried that previously to no avail.
Ah ha! tried it on rh7.3 and it worked,
because they applied a patch which you
can see in the iproute srpm.

cheers,
Pádraig.

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