Subject: questions

From: jesse zx <[email-masked]>
Date: Fri, 17 Mar 2000 14:10:25 -0800 (PST)

I have two questions about benefits of MPLS relative
to tradition ip routers:

1)about traffic balancing.
  in traditional router-based ip network, load
balancing is still available through metrics.
 the following is excerpted from mpls drafts
"Some degree of load balancing can be obtained by
adjusting the metrics associated with network links.
However,  there is a limit to how much can be
accomplished in this way, ...." 
 can you tell me what the limitation is ? 
 and why mpls doesn't have the limitation?

2)about scaling.
when in ip over atm. because router in the boundary
,ATM only provides links and act as cloud, so there
are o(N square)complexity.
 But i remembered that in traditional ip network,
we could designate one router as virtual central 
router, and another as backup.
 so based on the above information, some description
in the mpls-framework-draft is not exactly right.

  How about your opinion?

  thanks!!!

   jesse
   March/17  

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