[j-nsp] 10.3 on MX960 with MPC only?

[Derick Winkworth]

You know, just as this thread popped up on this list, we were dealing with a 
multicast related issue...  On an MX if you statically map a unicast IP address 
to a multicast mac address, you have to specify a single l2 interface to forward 
that traffic out of.  It essentially defeats the whole purpose of creating the 
mapping in the first place.

So I thought, what if we connect to ports on the same box together?  This 
worked.  Essentially you create a logical interface on one end of the cable and 
you move your layer 3 config to it for that particular VLAN, then the other end 
of the cable is just a trunk port.  


This might resolve your issue.




________________________________
From: Chris Evans <chrisccnpspam2 at gmail.com>
To: Derick Winkworth <dwinkworth at att.net>
Cc: juniper-nsp at puck.nether.net
Sent: Tue, August 31, 2010 11:45:58 AM
Subject: Re: [j-nsp] 10.3 on MX960 with MPC only?


Agreed if they offering the mx  as an Ethernet switch this should be 
supported.   Nag your account team.  I had them put in an enhancement request 
but who knows if they are listening.  

> "Its not supported" is the wrong phrase.  "Its broken" is more appropriate.  
>Whatever design choices that were made in the past that led to this, as you 
>said, "mind-blowing" caveat, Juniper needs to go backwards and fix it.
> 
> On Tue Aug 31st, 2010 8:01 AM CDT Chris Evans wrote:
> 
>>Try configuring an irb, igmp, igmp-snooping and a trunk port on 10.x code.
>>It will tell you its not supported.  It's never been supported per JTAC.
>>Also as per jtacs comment they put that statement in newer code as they
>>didn't know it wasnt supported before.  I asked jtac to update the
>>documentation.
>> > Is this in documentation somewhere? I just did a quick pass through the
>>IGMP
>>> snooping docs and I did not see it stated anywhere in there... maybe I
>>missed
>>> it.
>>>
>>>
>>>
>>>
>>>
>>> ________________________________
>>> From: Derick Winkworth <dwinkworth at att.net>
>>> To: Chris Evans <chrisccnpspam2 at gmail.com>; Gavin Tweedie <gav at narx.net>
>>> Cc: juniper-nsp at puck.nether.net
>>> Sent: Tue, August 31, 2010 7:13:37 AM
>>> Subject: Re: [j-nsp] 10.3 on MX960 with MPC only?
>>>
>>> ###########
>>> I'm not even going to mention that
>>>
>>> IGMP-Snooping isn't support on trunk interfaces which blows my mind.
>>> ############
>>>
>>>
>>> wow!
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>