SPP simplifies analysis of proposed extensions

AS path of routes

in BGP table seen from

member-AS

Corresponding

SPP paths :

no solution

2 0

(b) 0

3 0

q z y 0

q r 0

q a b 0

1 0

(y) 0

2 0

a q r 0

a b 0

a z y 0

z a b 0

z y 0

z q r 0

3 0

(r) 0

1 0

All paths appear to be of equal length. Ties are

broken using IGP metric, or Next-Hop.

Proposal : Allow AS-path length to include member ASes

within a confederation.