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RootServerInfo what is this ?

 

RootServerInfo what is this ?

- and is it required. We had a problem where
oracle's listner would have problems,
either an ORA-12547: TNS:lost contact or an ORA-12637: Packet
receive failed error message.

I found that this did not have a entry for
RootServerInfo - the other servers did.
I added this entry at the top of the host file
and it looks like this was a fix for the errors. I need to understand what this is.
could not google anywhere for this.

3 REPLIES
Jim Walls
Trusted Contributor

Re: RootServerInfo what is this ?

This is likely a DNS problem.

The root servers are the servers at "the base of the Internet Name Service tree". They provide the top level IP addresses for the rest of the Internet.

Your DNS server needs to have a RootServerInfo zone set up.

Contact your network administrator or service provider.

Re: RootServerInfo what is this ?

Its in the host file as

ip address RootServerInfo

I have the real dns servers in the host file

Bill Hassell
Honored Contributor

Re: RootServerInfo what is this ?

> ip address RootServerInfo
> I have the real dns servers in the host file

The /etc/hosts file will not be consulted if there is no /etc/nsswitch.conf file, or the nsswitch.conf file does not specify files then dns. To see how the resolver behaves, use nsquery:

nsquery hosts RootServerInfo
nsquery hosts 1.2.3.4

to watch the resolution steps. Here's a good nsswitch.conf file:

passwd: files
group: files
hosts: files [NOTFOUND=continue UNAVAIL=continue] dns
ipnodes: files [NOTFOUND=return UNAVAIL=return TRYAGAIN=return]
services: files
networks: files
protocols: files
rpc: files
publickey: files
netgroup: files
automount: files
aliases: files


Bill Hassell, sysadmin