Single AS Number for multiple prefixes in different country

Michel de Nostredame d.nostra at gmail.com
Mon Jan 17 20:00:53 UTC 2011


On Mon, Jan 17, 2011 at 12:20 AM, Patrick W. Gilmore <patrick at ianai.net> wrote:
> On Jan 17, 2011, at 12:32 AM, Michel de Nostredame wrote:
> I do not think that paragraph means what you think it means.
> I've seen my own AS in full tables from upstreams using Juniper routers many times.

According to the problem I had, the behavior is more like
"when I receive asX from 1st direct link, I will not send to asX on
2nd direct link by default."

For example,
I (say as#65001) advertised "10.1.0.0/16 ^65001$" on 1st link to my
ISP, say as#65000.
and advertise "10.2.0.0/16 ^65001$" to the same ISP on 2nd link.

Then,
I will not receive "10.2.0.0/16 ^65000 65001$" on 1st link,
and will not receive "10.1.0.0/16 ^65000 65001$" on 2nd link.

I believe my ISP did not intentionally filter out my routes,
but it more like default behavior as described in document.
Setting up default-route on both of my border routers addressed the needs.

After we established the leased line between two sites,
we no longer need to send cross site traffic via ISP.

--
Michel~




More information about the NANOG mailing list