I wonder how many people have two IPs pointing to the same box... I know
some co-locates that give 25 IPs/rack space... This restriction in no way
enforces redundancy. It really only makes things a hassle for companies that
have small business plans with only one IP.
-Eric P.
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----- Original Message -----
From: "Jim McAtee" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, May 25, 2001 6:03 PM
Subject: Re: 2+ nameservers sharing 1 ip?
> Yeah it arbitrarily tries to ensure that the DNS system has some degree of
> robustness. You're still free to screw it up, though.
>
> Wouldn't multiple name servers loadbalanced at the same IP address
> effectively be a single server? Logically, it would seem so. You still
> have no protection for network failures.
>
> I'll bet the reasoning behind the requirement also has something to do
with
> the way most DNS resolvers operate. If a query fails at one name server,
> the resolver tries another. Placing multiple name servers at the same IP
> address would defeat this behavior. It would be foolish (and inefficient)
> for a resolver to keep querying name servers at the same IP address in the
> hopes that a name server is going to magically start working at that
> address.
>
> Why not run two ip addresses on the same box and have the name server
answer
> to either? Since you don't care about fault tolerance, this would be one
> solution.
>
> Jim
>
>
> ----- Original Message -----
> From: "tc lewis" <[EMAIL PROTECTED]>
> To: "Lynn W. Taylor" <[EMAIL PROTECTED]>
> Cc: <[EMAIL PROTECTED]>
> Sent: Friday, May 25, 2001 6:20 PM
> Subject: RE: 2+ nameservers sharing 1 ip?
>
>
> >
> > that reason is flawed. i think we all know that the whole "you should
> > have 2 nameservers in different geographic locations for fail purposes"
> > ideal is often swept under the carpet.
> >
> > nsi shouldn't care about my fault tolerance; that's my concern.
> >
> > there are plenty of ways to network balance 1 ip.
> >
> > now we're back to there being 0 technical reasons. it's an arbitrary
> > restriction network solutions has made and is ignorantly enforcing.
> >
> > -tcl.
> >
> >
> > On Fri, 25 May 2001, Lynn W. Taylor wrote:
> >
> > > Sorry for the cross-post, but please post to one list only.
> > >
> > > The reason you have two name servers is so that you can turn one off
and
> > > still have one.
> > >
> > > Ideally, they'll be widely seperated so that there is no single point
of
> > > failure that will shut both of them down.
> > >
> > > I don't know how to do that with just one IP.
> > >
> > > -----Original Message-----
> > > From: tc lewis
> > > Sent: Friday, May 25, 2001 4:25 PM
> > > To: Jackie Fong
> > > Cc: INTERNET@BCN {[EMAIL PROTECTED]}; INTERNET@BCN
> > > {[EMAIL PROTECTED]}
> > > Subject: RE: 2+ nameservers sharing 1 ip?
> > >
> > > how is it not legal?
> > >
> > > while irrelevant, one of the reasons is so all the domains i have
using
> > > nameserver x and nameserver y are effectively both using nameserver x.
> > > they already are -- i don't see the need to waste ip space and various
> > > other resources.
> > >
> > > -tcl.
> > >
> > >
> > > On Fri, 25 May 2001, Jackie Fong wrote:
> > >
> > > > tcl,
> > > >
> > > > I don't think it's 'legal' to have two nameservers with the same IP.
> Why
> > > > do you want to do that anyway? I don't see any reasons to do
this...
> > > >
> > > > > the manage client interface (action=manage_nameserversmeservers)
> doesn't
> > > > > seem to allow me to create 2 nameservers with the same ip:
> > > > >
> > > > > Unable to create nameserver: Registry error, nameserver creation
> failed
> > > > > [Attribute value not unique]
> > > > >
> > > > > is there any technical reason for this? is this just an extra
step
> of
> > > > > user error prevention? any way to get around it?
> > > > >
> > > > > -tcl.
>
>
