PREFER_ME Global Community?

2

0

3

1

2 5 1 4 7 0

2 0

1 3 6 0

1 4 7 0

3 2 0

3 6 0

shortest paths,

no transit across 3

Import only from 1,

no transit across 3,

send PREFER_ME

to 2

shortest paths

shortest paths,

no transit across 1

Imagine a world with no

LOCAL_PREFERENCE but

with PREFER_ME …

A single AS can use

PREFER_ME to create

a “BAD GADGET” even

when others are doing

vanilla routing.

Does PREFER_ME make

it easier to do bad things?

Guidelines for safe use

of PREFER_ME?

Ties at 1 and 3 are broken by next-hop address...

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