[j-nsp] routing optimal path or suboptimal path

[Mark Tinka]

On Saturday 25 October 2008 21:53:55 Andrew Jimmy wrote:

> How do you guys practically define/consider that this is
> optimal path and this is suboptimal path.

This may differ from network to network.

In our case:

For the IGP; the optimal path is the shortest one to the 
Loopback address of the end router. Default routing is 
sub-optimal and unsupported.

For BGP; the optimal path is generally the one with the 
shortest vector to the end AS. The routing/forwarding table 
would typically be default-free. However, other factors may 
cause this strategy to evolve, e.g., $ettlement-$tatu$ of 
circuits, circuit congestion, management decisions, e.t.c.

How this is actually technically implemented is in the 
details. What the above tries to show, for us, is a 
high-level strategy on how we consider path optimity.

Cheers,

Mark.
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