I have a interesting situation where if one of my two risc/6000 machines is brought down I try to telenet to the one machine that is up it takes minutes to find machine eventually telenets as soon as the other machine comes up no problem telenet right away.Does anybody know whats going on here?Mind you i can ping machine fine while other machine is down.
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telnet problem 3
- Thread starter terrapin
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ianmcgowan
IS-IT--Management
Is machine2 your dns server?
We have similar problems if our dns service is out - aix tries to do a reverse lookup on the address you're connecting from, and it can take several minutes to time out.
Are there any NFS mounts across the machines? If they are not available it can cause odd problems like this.
hth,
ian
We have similar problems if our dns service is out - aix tries to do a reverse lookup on the address you're connecting from, and it can take several minutes to time out.
Are there any NFS mounts across the machines? If they are not available it can cause odd problems like this.
hth,
ian
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ianmcgowan
IS-IT--Management
Questions:
1) what does "cat /etc/resolv.conf" look like?
2) if you do "nslookup 192.168.1.1" from machine1 while machine2 is up, what do you get? how about when machine2 is down? (replace that address with the actual IP address of the client trying to telnet to machine1).
3) what does "netstat -nr" look like? any funky routing issues? (probably not, since you can ping ok, but you never know...)
1) what does "cat /etc/resolv.conf" look like?
2) if you do "nslookup 192.168.1.1" from machine1 while machine2 is up, what do you get? how about when machine2 is down? (replace that address with the actual IP address of the client trying to telnet to machine1).
3) what does "netstat -nr" look like? any funky routing issues? (probably not, since you can ping ok, but you never know...)
Verify that no domain name services are running on the machine by typing domainname. If there is no response this is a good indicator that no domain name services are running.
Check your /etc/netsvc.conf file to be setup hosts=local,bind4 to have the system look at the hosts file before going to the internet to lookup names. If the other AIX system is a gateway for the current system this may cause a problem.
If the reverse lookup is causing a problem and you are running version 4.3.3.15 of bos.net.tcp.client the /etc/inetd.conf telnet entry can be modified and a -c flag added to telnet. This should stop the reverse lookup from occuring.
Check your /etc/netsvc.conf file to be setup hosts=local,bind4 to have the system look at the hosts file before going to the internet to lookup names. If the other AIX system is a gateway for the current system this may cause a problem.
If the reverse lookup is causing a problem and you are running version 4.3.3.15 of bos.net.tcp.client the /etc/inetd.conf telnet entry can be modified and a -c flag added to telnet. This should stop the reverse lookup from occuring.
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