[c-nsp] MPLS on CAT5500

[Brandon Price]

PE1 to P is 100mb link which supports Jumbo frames no problem.
The 5500 also acts as a PE for a few of our COLO customers so It needs
to
Be running MPLS while I transition the WAN links from PE1 to PE2

Hope that makes sense..

Brandon Price
Sterling Communications Inc.
 
/31 <--- The Subnet Formally Known as "Unusable"
 

-----Original Message-----
From: Phil Bedard [mailto:philxor at gmail.com] 
Sent: Friday, January 18, 2008 10:57 AM
To: Brandon Price
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] MPLS on CAT5500

What is the PE1 to P link? I would try very hard to not use the 5500 as
a P router.  Maybe MPLSoGRE would work?  Or using the 5505 as a  
bridge?   If they are both Ethernet, then just trunk things through.

Phil

On Jan 18, 2008, at 12:46 PM, Brandon Price wrote:

> Guys, I apologize if this is a lame-brain question but I am new to 
> MPLS...
>
> We have a pretty simple MPLS VPN setup comprised of the following 3
> routers:
>
> PE1 <------> P <-----> PE2
>
> PE2 is a new router we are transitioning customers to.
> PE1 is 7206VXR 12.4(17)
> PE2 is CAT6513/SUP720-3B 12.2(18)SXF12 the P router is a Cat5500 
> catos6.4(23a)  / RSM ios12.2(46a)
>
>
> the P to PE2 link is a 1GB link on a WS-X5410 blade.
> According to cisco's Catalyst Jumbo Frame documentation this blade 
> does not support a larger mtu than 1500.
> However if you enable dot1q trunking yet transmit on the native VLAN 
> the switch will accept an additional 4 bytes.
>
> My question is, since the P router will always be the penultimate hop 
> in this layout ? will having room for just 1 label be sufficient?
>
> Also the RSM in the cat5500 only supports TDP for label distribution ?
> Any potential drawbacks to this?
>
> Thanks,
>
> Brandon Price
> Sterling Communications Inc.
>
> /31 <--- The Subnet Formally Known as "Unusable"
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