On Mon, 15 Oct 2007, Bradley Urberg Carlson wrote:
I have a few customers' customers, who appear at a local IX. Due to the MLPA-like nature of the IX, I hear their prefixes both at the IX and via my own transit customers. I normally use localpref to prefer customer advertisements over peers' advertisements.
There is a customer's customer who is advertising more-specifics at the IX (and using a different source AS, to boot)
Time to time you will see this. You could also hear the more specifics from another peer that is one of their transit providers or you could hear them via one of your transit providers.
I can think of a couple ways to prevent hearing these, but thought I should ask for suggestions first.
You can do all kinds of things to other network's routes especially when those routes aren't from your customers and what you are doing doesn't break connectivity (or solves a capacity problem and improves connectivity). However, if you tweak routes of a paying customer then you will need to consider what your answer to your customer will be for overriding their traffic engineering. Mike. +----------------- H U R R I C A N E - E L E C T R I C -----------------+ | Mike Leber Wholesale IPv4 and IPv6 Transit 510 580 4100 | | Hurricane Electric Web Hosting Colocation AS6939 | | mleber@he.net http://he.net | +-----------------------------------------------------------------------+