Re: The ORIGIN option on BGP - what is it for?

On Thu, Oct 20, 2005 at 10:34:35PM -0700, Peter Boothe wrote:

So my question is: What do people use ORIGIN: EGP vs ORIGIN: IGP to distinguish? What makes a route EGP vs. IGP to you?

Origin is a mandatory transitive attribute which is being used in the BGP decision algorithm. If you have a prefix with the same localpref and aspath-length, the decision will be made based on the lowest origin-value. IGP wins over EGP, EGP wins over incomplete. You might use it to influence your inbound traffic. -- Sabri please do not throw salami pizza away