[86047] in North American Network Operators' Group
Re: The ORIGIN option on BGP - what is it for?
daemon@ATHENA.MIT.EDU (Patrick W. Gilmore)
Fri Oct 21 08:46:14 2005
In-Reply-To: <Pine.SOL.4.58.0510202225030.18144@ix.cs.uoregon.edu>
Cc: "Patrick W. Gilmore" <patrick@ianai.net>
From: "Patrick W. Gilmore" <patrick@ianai.net>
Date: Fri, 21 Oct 2005 07:53:25 -0400
To: nanog@merit.edu
Errors-To: owner-nanog@merit.edu
On Oct 21, 2005, at 1:34 AM, Peter Boothe wrote:
> What makes you mark routes as ORIGIN: IGP vs ORIGIN: EGP?
>
> I just checked out the latest routeviews snapshot to see what the
> origins
> of various routes were set to. The command line
> $ bzcat oix-full-snapshot-latest.dat.bz2 | sed -e 's/.* //' | sort \
> | uniq -c | sort -nk1
> Gave me a bunch of crap from overly-long lines, and then
> 9091 e
> 682087 ?
> 7560175 i
>
> Which means that out of 8,251,353 routes in routeviews, only 9,091 are
> marked as ORIGIN: EGP, while 682,087 are not configured as one or the
> other, and the other *7.5 million* are marked ORIGIN: IGP.
>
> So my question is: What do people use ORIGIN: EGP vs ORIGIN: IGP to
> distinguish? What makes a route EGP vs. IGP to you?
Mostly load balancing, thought manually setting it via route maps.
--
TTFN,
patrick
