nanog mailing list archives
Re: Peering Exchange Configurations
From: "Elmar K. Bins" <elmi () 4ever de>
Date: Thu, 8 Apr 2010 18:42:16 +0200
Re JOe, jabley () hopcount ca (Joe Abley) wrote:
1) Is a private AS typically used for the exchange side of the session?No. Also many exchange points do not run route servers at all, and expect participants to build bilateral BGP sessions directly between each other.
...which is a shame. Routeservers in place gives you a nice benefit upon hooking up to the exchange and before you have even found out who is on the grid (anyone have a list for NOTA?). Basically, the bigger exchange points (as in "european" mostly) all have routeservers ready, but not everybody chooses to use them.
2) Are RFC1918 IPs typically used for the p2p links into the exchange?No. Participants in an exchange typically number their exchange-facing interfaces out of a larger (non-p2p) subnet, e.g. an IPv4 /24 or /23, or an IPv6 /48 (or both).
Using RFC1918 for oft-traversed addresses is also not a good idea ;)
3) Do peering exchanges typically remove their AS from the path advertised to exchange participants?Some do, I hear. See above regarding route servers.
None of the routeservers I am peering with does insert their ASN. On direct peering sessions, there is of course nobody in between.
4) Do exchanges typically support the following address families? IPv4 Multicast IPv6 Unicast IPv6 MulticastI'm quite ignorant of multicast. IPv6 unicast peering is common.
Multicast is still seen as something special, sometimes even on dedicated hardware, or on different VLANs. It's certainly possible, but usually there are not so many participants...
5) I see that Bird, OpenBDGd, and Quagga are all options for route server software. Does one of those packages stand out as the clear current choice for production peering exchanges?BIRD seems to be the choice du jour based on idle hallway chatter, but I have not compared them.
I was thinking "plat du jour"...and well, it's "du jour", so it can change in an instant. Cheers, Elmar.
Current thread:
- Peering Exchange Configurations Brad Fleming (Apr 08)
- Re: Peering Exchange Configurations Massimiliano Stucchi (Apr 08)
- Re: Peering Exchange Configurations Joe Abley (Apr 08)
- Re: Peering Exchange Configurations Elmar K. Bins (Apr 08)
- Re: Peering Exchange Configurations Joe Abley (Apr 08)
- Re: Peering Exchange Configurations Chris Costa (Apr 08)
- Re: Peering Exchange Configurations Elmar K. Bins (Apr 08)
- Re: Peering Exchange Configurations Grzegorz Janoszka (Apr 08)
- Re: Peering Exchange Configurations Jake Khuon (Apr 08)
- RE: Peering Exchange Configurations Aaron Wendel (Apr 08)
- Re: Peering Exchange Configurations Owen DeLong (Apr 08)
- Re: Peering Exchange Configurations Patrick W. Gilmore (Apr 08)
- RE: Peering Exchange Configurations Aaron Wendel (Apr 08)
- Re: Peering Exchange Configurations Owen DeLong (Apr 08)