nanog mailing list archives
Re: Numbering nameservers and resolvers
From: John Kristoff <jtk () cymru com>
Date: Tue, 17 Aug 2010 10:48:21 -0500
On Tue, 17 Aug 2010 12:11:56 +0000 (UTC) Sven Olaf Kamphuis <sven () cb3rob net> wrote:
nowadays, i'd simply put them all on the same /24 which you simply announce on different pops
I would raise a red flag of caution with this approach especially for services that need to be reachable outside your network If there is a a snafu with said /24 prefix, particularly outside your own routing domain, a reachability problem could persist for an extended period and you'd be in a difficult position to solve it on your own. For instance, if it flaps and someone, for better or worse, dampens that route, that could mean an extended outage for all those hosts until the damping period timer expires. On a related note, some systems and folks have taken multiple unique origin ASNs as a measure of diversity. In pratice, unless there is some odd AS path mangling going on for your specific routes, which is unlikely, one can properly instrument diversity using a single origin ASN with multiple prefixes. Its the path and the prefix that matters, much less the ASN. John
Current thread:
- Re: Numbering nameservers and resolvers, (continued)
- Re: Numbering nameservers and resolvers Owen DeLong (Aug 16)
- Re: Numbering nameservers and resolvers Matthew Palmer (Aug 17)
- Re: Numbering nameservers and resolvers Sven Olaf Kamphuis (Aug 17)
- Re: Numbering nameservers and resolvers Jared Mauch (Aug 17)
- Re: Numbering nameservers and resolvers Joe Greco (Aug 17)
- Re: Numbering nameservers and resolvers Phil Vandry (Aug 18)
- Re: Numbering nameservers and resolvers Lyndon Nerenberg (Aug 18)
- Re: Numbering nameservers and resolvers Joe Greco (Aug 17)
- Re: Numbering nameservers and resolvers Chris Adams (Aug 17)
- Re: Numbering nameservers and resolvers Jared Mauch (Aug 17)
- Re: Numbering nameservers and resolvers John Kristoff (Aug 17)
- Re: Numbering nameservers and resolvers Doug Barton (Aug 17)
- Re: Numbering nameservers and resolvers Patrick W. Gilmore (Aug 16)
- Re: Numbering nameservers and resolvers Arie Vayner (Aug 16)
- Re: Numbering nameservers and resolvers Jared Mauch (Aug 16)