DNS Caching Issue

[Torsten Segner]

Am Mon, 25 Jul 2011 08:22:00 -0600
schrieb "Sathyan Arjunan (sarjunan) [CONTRACTOR]" <sarjunan at micron.com>:

> Recent days, I am facing frequent caching issues with my DNS servers
> which are responsible for recursive lookup to external queries. As a
> temporary solution, we used to refresh the named daemon to clear the
> cache. To isolate this issue we upgraded the BIND to "BIND 9.7.3" but
> even after the upgrade issue repeats. 
> 
>  
> 
> If I do a nslookup for "mail.sin.gpi-g.com", it fails. 
> 
>  
> 
> nslookup mail.sin.gpi-g.com
> Server:         dnsserver
> 
> Address:        x.x.x.x#53
> 
>  
> 
> ** server can't find mail.sin.gpi-g.com: SERVFAIL
> 
>  
> 
> To fix this I have to restart the named daemon in caching DNS server.
> Once I restart, the lookup resolves well. However the issue appears
> again in few days. Any thoughts?
> 
>  
> 
> nslookup mail.sin.gpi-g.com
> 
> Server:         dnsserver
> 
> Address:        x.x.x.x#53
> 
>  
> 
> Non-authoritative answer:
> 
> Name:   mail.sin.gpi-g.com
> 
> Address: 203.175.163.180
> 
>  
> 
> Regards,
> 
> --Sathyan
> 



One of the authoritative nameservers (nameserver2.gpi-g.com / 202.182.61.51) is not responding properly.
You should ask the administrator (rico at gpi-g.com) of the server to fix this.


Ciao
Torsten