[61194] in North American Network Operators' Group
RE: bgp route-map
daemon@ATHENA.MIT.EDU (Michel Py)
Mon Aug 25 19:41:37 2003
Date: Mon, 25 Aug 2003 16:40:51 -0700
From: "Michel Py" <michel@arneill-py.sacramento.ca.us>
To: "Haesu" <haesu@towardex.com>, <nanog@merit.edu>
Errors-To: owner-nanog-outgoing@merit.edu
> Haesu C. wrote:
> However: On prefixes being announced to me INBOUND, is there a
> feature to set in route-map so that it checks whether the
> advertised prefix is already existing in local RIB?
If I understand correctly, what you want is the same as conditional =
advertisements:
http://www.cisco.com/en/US/tech/tk365/tk80/technologies_configuration_exa=
mple09186a0080094309.shtml
except that it needs to be applied to received routes instead of =
advertised routes.
In other words, it's not enough for you to dump the bogon traffic in a =
blackhole; you also want to dump bogonish routes received from your =
peers before they even get to your RIB.
If I understood it right, a na=EFve look at it would be that since the =
function already exists in the other direction it should not be too big =
of a deal to do it the other way, but I'm not the one compiling IOS.
Michel.
