[c-nsp] Yet another "wont fix because its on the 7500"

Joe Maimon jmaimon at ttec.com
Tue Apr 18 11:22:32 EDT 2006


Rodney,

Thanks for the attention. I appreciate knowing you were involved in this 
from the beginning. Your fellow TAC engineer is a real great guy. 
Understandably, however, I am quite dissapointed with the answer received.

I suppose this means that contrary to an outsiders assumption, this is a 
deal more than a five line fix, or even hack.

I am quite happy testing the unsupported features for you guys, I seem 
to do that every now and then anyways. I dont see how it would pose any 
problem if its unsupported and works as opposed to it being unsupported 
and doesnt work.

I suppose a public appeal for all those that would like to be able to 
have pppoe intefaces in a vrf with mpls (7500) to make themselves heard 
is in order.

Even though pppoe is not distributed, you can easily do 250-500 users on 
each rsp4, if everything else is being distributed.

Note that I have long since lost hope for

- DCEF support turned on per subinteface
- DCEF PPPoE as per L2TP and GRE (if those are in, how difficult is it 
to do pppoe?)

The main conclusion is that the only thing the 7500 is usefull for is T1 
aggregation and maybe a little dot1q.

Joe



Rodney Dunn wrote:

> Joe,
> 
> It just so happens the TAC engineer that has this case sits beside
> me. I'd been working with him on this to try and get a clear message
> from the BU's. This is one of the main problems with the 75xx.
> 
> You can configure about every feature in IOS on it but they
> are not all tested/supported due to it's distributed switching
> architecture. This is one such feature combination.
> 
> We have passed the information to the PM's of the MPLS and
> 75xx BU and it's their decision to make if they will dedicate
> the time/resources to rewrite and set up testbeds to verify this
> feature combination. Given only one or two customers have ever
> asked for this on the 75xx it will probably not get added.
> 
> It's more than just fixing the switching vector to handle the
> rewrites in the MPLS path. For us to claim support we have to
> add it in testbeds to it's constantly tested and that is a business
> decision by the BU's. The TAC engineer was trying very hard to get
> the right answer for you even though it wasn't the answer you (or
> us either for that matter) we were hoping to get.
> 
> I'm still trying to see if we can get it to work in the code without
> a lot of extra work but it's not looking too good.
> 
> We can take this offline.
> 
> Rodney
> 
> 
> On Mon, Apr 17, 2006 at 05:03:43PM -0400, Joe Maimon wrote:
> 
>>CSCed78665 Title: ICMP Echo-reply from c7507s tagged int. have corrupted 
>>PPPoE header
>>
>>Took over six months for TAC to come back and say
>>
>>Since 7500 isnt targetted as broadband aggregation, its perfectly 
>>acceptable that packets from tagged interfaces cant output properly to 
>>pppox interfaces.
>>
>>This is crap.
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> 
> 
> 


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