nanog mailing list archives

Re: Single router for P/PE functions


From: "Alex H. Ryu" <r.hyunseog () ieee org>
Date: Fri, 04 Sep 2009 10:44:19 -0500



What if there is a problem from software, filter, mis-configuration from
one of the routers ?
It will affect whole ring network, not just that problem router.

Also if there is routing protocol bounce because of link flapping, it
will be propagate through the ring forever.

Alex

Serge Vautour wrote:
We're trying to save on Transport links. Instead of multi-homing each PE to 2 Ps, we're considering building a ring: 
P-PE-PE-PE-P. This ring follows the transport ring. Each link would be engineering to make sure it can handle all of 
the traffic from all 3PEs in case of a failure. As the network grows, we could get individual transport links from 
PE-P.

Apart from bandwidth, I was curious if there were other problems I related to doing this that I wasn't thinking of. 
Thanks for all the replies. Much appreciated.

Serge




________________________________
From: William McCall <william.mccall () gmail com>
To: Serge Vautour <serge () nbnet nb ca>
Cc: nanog () nanog org
Sent: Friday, September 4, 2009 1:07:40 AM
Subject: Re: Single router for P/PE functions

Kinda depends on what you're doing exactly, but like Erik said, it certainly possible and depending on your 
particular needs, it might not be much of an issue at all.

Can you describe your scenario a bit more?

--WM


On Thu, Sep 3, 2009 at 10:20 AM, Serge Vautour <sergevautour () yahoo ca> wrote:

  
Hello,

    
I'm pretty confident that a router can be used to perform P & PE functions simultaneously. What about from a best 
practice perspective? Is this something that should be completely avoided? Why? We're considering doing this as a 
temporary workaround but we all know temporary usually lasts a long time. I'd like to know what kind of mess awaits 
if we let this one go.
      
Thanks,
      
Serge




    
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