The LINX used to be awash with mail from peers announcing prefix filter changes. A couple of people there postulated that the coordinated reconfigurations of routers out of maintenance window synchronised by mail to the list saying "change my filters" was a dangerous thing, and could be responsible for systematic cross-provider failure. I never heard of anybody correlating any performance data with prefix-update mail to the list, but it was an interesting theory.
The LINX members seem to mostly use max-prefix settings - we (5378) use them with all peers, and it does stop us from getting clobbered by route leaks. As for filters, we only filter out our own internal routes being received from peers. Brendan -- Brendan Black UK mobile: +44 7941 647890 Linux User# 44680 "You know, it's at times like this when I'm trapped in a Vogon airlock with a man from Betelgeuse and about to die of asphyxiation in deep space that I really wish I'd listened to what my mother told me when I was young!" "Why, what did she tell you?" "I don't know, I didn't listen!" -- Douglas Adams, "Hitchhiker's Guide to the Galaxy" - To unsubscribe from nznog, send email to majordomo(a)list.waikato.ac.nz where the body of your message reads: unsubscribe nznog