From: W. Alan Robertson (warobertson@xxxxxxxxxxxxx)
Date: Fri Aug 03 2001 - 13:07:06 GMT-3
For reverse lookups to appear correctly with traceroute (or anything
else), every IP address along the path needs to be defined. Your
traceroute packets' TTLs are decremented at every hop... The
expiration notification originates from the interface where it
expires. The good news is that you can have multiple equivanent
entries for reverse lookups, which is nice for multihomed hosts (like
routers).
There's no problem with having this in one reverse db file:
192.168.1.1 IN PTR router1.domainname.com
And having this in another:
192.168.2.1 IN PTR router1.domainname.com
Bind will not care that it's duplicated.
Alan
----- Original Message -----
From: "david huskey" <barbedwireblack@yahoo.com>
To: <Ron.Fuller@3x.com>
Cc: <ccielab@groupstudy.com>
Sent: Friday, August 03, 2001 11:35 AM
Subject: Re: dns
> I got the trace to resolve.
> I had to put the serial interface in dns even though i
> am tracing to the loopback interface.
>
> is there a way to change this behavior or in order
> to resolve i need a dns entry for each interface?
>
>
> --- Ron.Fuller@3x.com wrote:
> > I don't know of anything in IOS that is similar to
> > nslookup. As for the
> > DNS names in traceroute, they come from having DNS
> > servers defined on the
> > router. When the router does a traceroute, the DNS
> > lookups are performed.
> >
> > ip name-server 1.1.1.1
> > ip name-server 2.2.2.2
> >
> > HTH!
> > Ron Fuller, CCIE #5851, CCDP, CCNP-ATM, CSS Level 1,
> > CCNP-Voice, MCNE
> > 3X Corporation
> > rfuller@3x.com
> >
> >
> >
> >
> > david huskey <barbedwireblack@yahoo.com>
> > Sent by: nobody@groupstudy.com
> > 08/03/2001 10:40 AM
> > Please respond to david huskey
> >
> >
> > To: ccielab@groupstudy.com
> > cc:
> > Subject: dns
> >
> >
> > Is there any cisco command that is similar
> > to "nslookup"?
> > Also how do you get it to put dns names in the
> > traceroute output.
> >
> > thanks in advance,
> > David Huskey
> >
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