[c-nsp] 7600 with Sup720-3CXL and 6704/8 line cards

[Gert Doering]

Hi,

(I'm copying my reply back to the mailing list, as other readers will
find the answers in the archives)

On Tue, Apr 28, 2009 at 04:10:46PM -0400, Seth Fiermonti wrote:
> If it is so common, please answer.  

We have this specific line of questions about once per months.  It's 
really not so hard to find the answers in the archives.

I assume you get paid to do research these questions.  The people
answering on the list are not paid to do this.

> I am coming from a Foundry  
> background where things were just easier with regards to this.  Why  
> does Cisco have to make everything so confusing?  There is a reason  
> why no one gets fired for buying Cisco!

Well, with foundry it's easy - "as soon as you want something complicated,
the box will crash and burn".  Indeed :-)

> From my research, I cannot do VPLS on the 67xx line cards.  

Correct.

> I also cannot do any MPLS VPNs if I am not mistaken.  

Wrong.  With Sup720-3B and later, you can do all MPLS (L2 VPN, L3 VPN).

Whether or not the box can do MPLS with "LAN cards" does not depend on the 
type of LAN card, but on the supervisor.  No go with Sup1, Sup2, Sup720-3A,
full MPLS support with Sup720-3B, -3C or RSP720.  If you have DFCs, the
box will run with the lowest common denominator - read: if you have a single
"-3A", no MPLS.  If all is -3B or better: MPLS.

Some caveats apply, like "limited number of distinctive L3 VPNs" (1024
or so).  Discussed two days ago.

> My question is, can I  
> still populate up to 1 million IPv4 routes in the FIB on the 67xx.

Yes.  1 million TCAM entries, to be carved into partitions for IPv4, IPv6,
multicast and MPLS.

> Also, if I enable ay MPLS VPN services, will my performance drop by 50%.

This depends.  If MPLS TCAM gets full (more than 512 VPNs), yes.  Answered
yesterday.

gert
-- 
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de