I am working on a project with 50 - 70 servers in the AT&T data center
on University. They have either RHEL5U3 or CentOS5U3 on the systems.
I have DNS configured with the normal bind 9 packages that come with
CentOS5U3. My problem is when using ssh to get between the systems
if i use the short name for a system it takes a long time to get to
a shell prompt on the remote system. If I use the fully qualified
domain name or the IP address of I use a "-4" with the short name
I get to a shell prompt immediately. So to illustrate:
root@adm # ssh new75
takes a LONG time to get shell prompt.
Any of the following get me a shell prompt almost immediately:
root@adm # ssh -4 new75
root@adm # ssh new75.wholedomain.here
root@adm # ssh 10.4.5.6 (IP address of new75 system)
Since the "-4" option seems to have a positive effect I have gone
to each system and made sure the IPv6 kernel modules are not loaded
and the network file in /etc/sysconfig/ has the following line in
it:
NETWORKING_IPV6=no
but that made little or no difference to the problem. The lines
I added to the /etc/modprobe.conf file look like this:
alias net-pf-10 off
alias ipv6 off
I believe it some strange interaction problem between IPv6 and DNS
but I do not have a clear plan on what to try next.
Any suggestions?
--
Steven DuChene
---------------------------------------------------
PLUG-discuss mailing list -
PLUG-discuss@lists.plug.phoenix.az.us
To subscribe, unsubscribe, or to change your mail settings:
http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
(text/plain)