Cisco 2951: %IP: Bad hostname format when using a domain name

[roncro]

Hello,

I own a domain name, let's call it mydomain.us, and I have a few hosts that are multihomed and have a public IP as well as a private IP, and I am trying to see if I can do the following on a Cisco 2951 router.

If I want to use the same hostname/domain name, in the local/private network, and try to enter something like:

Charon-2951(config)#ip host thathost@mydomain.us 192.168.1.113  

edit:   oops..  I meant thathost.mydomain.us...

I get:

%IP: Bad hostname format

Is that because the "domain-name localdomain" setting on the router?

(the question actually is, can I get around that?)

thanks,

Ron

[Richard Burts]

Ron

I am not authoritative on this (and if someone who is authoritative would jump in that would be good) but I believe that the issue is that the ip host command expects a simple host name (not associated with a domain name). I do not believe that there is a way around this. 

[roncro]

Hi Rick,

when I revisited the config,  I think I made a typo, that's posibly why I saw the error.

Also,  pretty much all hostnames, for lookups, I have in there are like:

ip host thathost.localdomain 192.168.x.y

It seems the router does accept config lines like:

ip host thathost.mydomain.us 192.168.a.b    while ... if I didn't it would resolve to  thathost.mydomain.us   p.q.r.s, a public address,   which I wanted to prevent.

So what happens is, I think,  that if you tell the router it is 'located' in localdomain, it being   it's domain-name is localdomain,  it treats that as the default domain search.   so if I would like to 'go to'  thathost, my router's domain-name being used as the default search domain, it  assumes I am looking for  thathost.localdomain.  (I think if domain-name was set to   'mydomain.us' it would  assume the hostname i was looking for would be thathost.mydomain.us.)

some of it (above) is what I see, and it looks like that is how it works?

Ron

[Richard Burts]

Ron

I am not clear about your follow up question and am not able to give you an answer for it. Perhaps someone else in the community can help with this.

[balaji.bandi · Accepted solution]

how about configuring like below example :

ip domain name mydomain.us

ip host thathost 192.168.1.113

[roncro]

that is what I started doing,  somehow I was thinking to use two domain names, but that didn't make much sense.

thanks,

Ron