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тАО02-21-2006 04:39 AM
тАО02-21-2006 04:39 AM
Why can't I ping the server on which I have logged in? I can ping the other server in the cluster and other devices on the network.
Solved! Go to Solution.
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тАО02-21-2006 04:44 AM
тАО02-21-2006 04:44 AM
Re: pinging OpenVMS servers
welcome to the OpenVMS ITRC forum !
(assuming you're running TCP/IP services):
$ TCPIP PING localhost should always work. As well as TCPIP PING IP-adress-of-any-local interface (show them with TCPIP SHOW INT).
What is the error message ?
Volker.
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тАО02-21-2006 04:55 AM
тАО02-21-2006 04:55 AM
Re: pinging OpenVMS servers
If you do a TCPIP PING Localhost and get a response then your TCPIP on your system is probably configured properly. If you do a TCPIP PING IP-address-of-interface and it doesn't work then you it could be a number of problems.
1. If you cannot ping any systems outside of your VMS system then check your configured gatway.
2. If you can ping your gateway but nothing else then your gateway system may have the ping (ICMP) disabled for your system.
3. Can't think of anything else right now. Maybe someone else can add to what the possible problems could be.
Phil
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тАО02-21-2006 06:55 AM
тАО02-21-2006 06:55 AM
Re: pinging OpenVMS servers
Welcome.
If the ping command for localhost does not respond correctly, try the ping command with the IP address 127.0.0.1 .
$tcpip ping 127.0.0.1
If this command displays correct output, the TCPIP database is missing a definition for localhost .
As you said, you can able to ping to other node, that means there is no problem in the upper (application) layer protocols (such as FTP, TELNET).
Anyway you can check your network interface and routing works fine using....
ifconfig , netstat , and arp commands.
Btw, what type of error do you get such as host is unreachable, connection timed out, and network is unreachable.
Archunan
Archie
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тАО02-21-2006 07:36 AM
тАО02-21-2006 07:36 AM
Re: pinging OpenVMS servers
What does it do? (Hint: "Not work" is not a
useful answer.)
Which TCP/IP software and version?
If there's a name in your "ping" command,
does nslookup resolve it?
With almost no useful info in the question,
it's difficult to offer a useful answer.
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тАО02-21-2006 10:46 PM
тАО02-21-2006 10:46 PM
Re: pinging OpenVMS servers
More flesh on the bone.
We're running TCP/IP services (not sure which version) on Open VMS 7.2-1
when I ping localhost or 127.0.0.1 explicitly
I get responses indicating o ms timing.(success)
When I ping DFG001 or 10.12.2.1 (the VMS server I'm logged onto) I get no response after 2 minutes, Ctrl/C gives
TCPIP> ping 10.12.2.1
PING 10.12.2.1 (10.12.2.1): 56 data bytes
Cancel
----10.12.2.1 PING Statistics----
204 packets transmitted, 0 packets received, 100% packet loss
%SYSTEM-F-TIMEOUT, device timeout
I can successfully ping devices outside of the VMS cluster and the other node in the cluster, DFG002 or 10.12.2.2. I can also ping both VMS servers from a DOS prompt on my PC using both the IP address and the server name.
The converse is also true, in that, when logged into to DFG002 a can ping dfg001 but not dfg002 or its IP address 10.12.2.2.
I also have a problem with timeout connectivity on a thin client (Gembase) application which I think is also related.
This application had been operational up until August last year, since when it has been moribund. I now want to start to use it again and have encountered these problems.
I should say that networking is not my forte so any further help with diagnosis would be gratefully recieved.
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тАО02-21-2006 10:53 PM
тАО02-21-2006 10:53 PM
Re: pinging OpenVMS servers
you can find out about your TCPIP version with:
$ TCPIP SHOW VERSION
How are the interfaces and default route defined:
$ TCPIP SHOW INT
$ TCPIP SHOW ROUTE
Volker.
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тАО02-21-2006 11:46 PM
тАО02-21-2006 11:46 PM
Re: pinging OpenVMS servers
TCPIP> sh version
DIGITAL TCP/IP Services for OpenVMS Alpha Version V5.0A
on a AlphaServer DS20 500 MHz running OpenVMS V7.2-1
TCPIP> sh int
Packets
Interface IP_Addr Network mask Receive Send MTU
WE1 10.12.2.1 255.255.0.0 256384383 218836594 1500
LO0 127.0.0.1 255.0.0.0 39 39 0
TCPIP> sh route
DYNAMIC
Type Destination Gateway
DN 0.0.0.0 10.12.100.1
AN 10.12.0.0/16 10.12.2.1
DH 10.12.2.1 10.12.10.254
AH 10.12.2.2 6.4.0.0
DH 127.0.0.1 127.0.0.1
TCPIP>
Hope that helps.
The servers allow Powerterm users access and can FTP to and from other other servers/PCs.
Keith
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тАО02-22-2006 12:08 AM
тАО02-22-2006 12:08 AM
Re: pinging OpenVMS servers
>>>
TCPIP> sh int
...
WE1 10.12.2.1 255.255.0.0
...
TCPIP> sh route
DYNAMIC
Type Destination Gateway
...
DH 10.12.2.1 10.12.10.254
<<<
I think this routing entry is your problem.
Remove it please.
HTH,
Martin
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тАО02-22-2006 12:30 AM
тАО02-22-2006 12:30 AM
Solutionyou seem to be running dynamic routing (ROUTED or GATED routing daemon).
The 'D' in DH and DN indicates a dynamic route created by dynamic routing.
Try to stop routing with TCPIP> STOP ROUTING/GATED and/or manually remove the routes with TCPIP> SET NOROUTE 10.12.2.1
You might also want to check the permanent routes with TCPIP> SHOW ROUTE/PERM
Volker.