[j-nsp] Can someone tell me the reason?

[Daniel Roesen]

Hi Ali,

On Mon, Mar 18, 2013 at 11:49:29AM +1100, Ali Sumsam wrote:
> Can you elaborate a little more...what do you mean by "setting it to the
> empty path"?

When summarizing prefixes ("set routing-options aggregate" in JUNOS),
a set of ASNs seen in the AS_PATHs of contributing routes might be
generated for the aggregate route (it is by default for JUNOS, as far as
I remember). Often (most times, if not always these days) that's not
desired, so implementations usually offer a way to suppress that (JUNOS
with the "as-path" parameter).

see:
http://www.juniper.net/techpubs/en_US/junos/topics/reference/configuration-statement/aggregate-edit-routing-options.html
specifically:
http://www.juniper.net/techpubs/en_US/junos/topics/reference/configuration-statement/as-path-edit-routing-options.html

as-path path "()" or "" (can't remember) should do the trick to
suppress that as-set when generating the aggregate default route.

Best regards,
Daniel

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