What is the limit? (was RE: multi-homing fixes)

Thu Aug 30 10:32:27 UTC 2001

At 06:01 30/08/2001 -0400, John Fraizer wrote:

>Speaking of filtering:
>
>AS64602 at Mae-West from  Digex (AS2548) ASPATH=2548 64602 64602 64602
>64602 64602 64602 IGP
>
>AS65515 at Mae-West from  Verio (AS2914) ASPATH=2914 10910 10910 10910
>10910 10910 10910 11908 10530 5593 65515 IGP
>
>AS65515 at AADS from  Verio (AS2914) ASPATH=2914 10910 10910 10910 10910
>10910 10910 11908 10530 5593 65515 IGP
>
>AS65515 at Paix from  Verio (AS2914) ASPATH=2914 10910 10910 10910 10910
>10910 10910 11908 10530 5593 65515 IGP
>
>Which part of (64512 - 65535 != valid ASN) do providers not understand?
>
>Filter! Filter! Filter!

And your favourite router vendors have a useful command/knob to remove 
private ASes from announcements too. It's not hard to put that on all eBGP 
peerings...

philip
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