[Xorp-hackers] {Disarmed} Re: xorp: enable IGMP/PIM-SM over a VLAN interface on Linux

[frank hu]

Hi, Ben and Ray,

Thanks a lot for the kind help and open feedback.

I am investigating putting xorp as the multicast routing engine for our
network device running Linux. From the CLIs I can see that it provides the
set of multicast routing features that I am interested in. The reason that
xorp seems attractive to me is that it was listed as one test
implementations in RFC 4602. However the deficiency in the VLAN interfaces
support is a big no-no on Linux based software routers.

Thanks again!!

Frank

On Wed, Dec 7, 2011 at 9:03 PM, Ben Greear <greearb at candelatech.com> wrote:

> On 12/07/2011 07:13 PM, Ray Soucy wrote:
>
>> I haven't had good luck with default-system-configuration and VLAN
>> interfaces; especially where PIM is concerned.
>>
>> You likely need to specify the addresses manually (in addition to
>> creating the VLAN interfaces manually with vconfig).
>>
>> The XORP handling of VLANs has never been great; recent patches have
>> been made to try an improve it; but it's still has work to be done
>> before it's up to user expectations.
>>
>
> I don't ever test using default-system-config, but if you find
> problems when using config from within Xorp, please report the
> bug.
>
> In general, I'd suggest you drive all changes through xorp..ie,
> tell it to set the IP instead of hoping it will figure things out
> when you set it outside of xorp.
>
> You can script xorpsh using multiple -c 'command 1' -c 'command 2' ....
>
> It's not exactly user-friendly, but it works (for my uses, at least).
>
> And as always, patches are welcome, as are detailed bug reports
> with xorp logs, OS & kernel version, etc.  Please submit such
> bug reports to the bugzilla so we don't loose track of it.
>
>
>  Being familiar with the Cisco routing CLI, these caveats seem quite
>>> counter-intuitive... Could anybody help me understand if XORP was
>>> deployed
>>> outside the research/academia community?
>>>
>>
> Probably not so much.  We use it in our LANforge product, but we drive
> xorp from our program (which builds networks with a GUI) using
> programatically
> created xorpsh commands and xorp config files.  Those
> code paths are pretty well tested, but I'm certain bugs remain
> to be uncovered.
>
> Thanks,
> Ben
>
> --
> Ben Greear <greearb at candelatech.com>
> Candela Technologies Inc  http://www.candelatech.com
>
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