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Re: [BEHAVE] proprietary implementation v.s standardisedprotocols//re: draft-xu-behave-nat-state-sync-00

"Dan Wing" <dwing@cisco.com> Wed, 02 December 2009 03:41 UTC

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From: Dan Wing <dwing@cisco.com>
To: marka@isc.org
References: <4B156B5C.7060800@viagenie.ca> <003401ca72f1$7d0d0310$d40c6f0a@china.huawei.com> <000001ca72f4$1e1a30a0$c3f0200a@cisco.com> <200912020238.nB22c6v8005164@drugs.dv.isc.org>
Date: Tue, 01 Dec 2009 19:41:43 -0800
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Cc: behave@ietf.org, 'Xu Xiaohu' <xuxh@huawei.com>
Subject: Re: [BEHAVE] proprietary implementation v.s standardisedprotocols//re: draft-xu-behave-nat-state-sync-00
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> -----Original Message-----
> From: marka@isc.org [mailto:marka@isc.org] 
> Sent: Tuesday, December 01, 2009 6:38 PM
> To: Dan Wing
> Cc: 'Xu Xiaohu'; 'Simon Perreault'; behave@ietf.org
> Subject: Re: [BEHAVE] proprietary implementation v.s 
> standardisedprotocols//re: draft-xu-behave-nat-state-sync-00 
> 
> 
> In message <000001ca72f4$1e1a30a0$c3f0200a@cisco.com>, "Dan 
> Wing" writes:
> > To my knowledge, sites do not run two different 
> implementations of DNS server
> > s
> > (e.g., ISC BIND and InfoBlox, or Microsoft and Unbound) 
> where both DNSs back
> > up each other.  Like NAT, DNS needs to be rock-solid 
> reliable, and a single
> > packet could take out a DNS server.
> 
> Actually lots of sites use multiple vendors for DNS.   That being
> said there is not of lot of state to share between DNS servers.

So they would update each other when one receives, say, a DNS UPDATE?

-d


> DHCP servers on the other had need to share lots of state.  I don't
> believe the failover draft (draft-ietf-dhc-failover-12) reached a
> conclusion even though we implement most (all?) of it in our DHCP
> servers.
> 
> Mark
> -- 
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: marka@isc.org

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