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тАО12-20-2010 12:42 AM
тАО12-20-2010 12:42 AM
ARP settings and problems in OpenVMS
The network provider has changed some settings for the network. Two nodes cannot be reached, one is normal.
The network provider has disabled ARP-PROXY.
What can we do to get everything working, whithout using ARP-PROXY?
Thanks.
Piet
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тАО12-20-2010 02:10 AM
тАО12-20-2010 02:10 AM
Re: ARP settings and problems in OpenVMS
Are all three nodes connected to the same switch? If so, i fail to see what arp-proxy has to do with it.
Oswald
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тАО12-20-2010 02:28 AM
тАО12-20-2010 02:28 AM
Re: ARP settings and problems in OpenVMS
Thats also my problem.
They disabled ARP-PROXY on a router and we had a problem reaching two out of three nodes. A windows domaincontroller, on the same switch, was reachable.
They enabled ARP-PROXY, no problem.
And yes, the three nodes are connected to the same switch.
Greetings
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тАО12-20-2010 02:37 AM
тАО12-20-2010 02:37 AM
Re: ARP settings and problems in OpenVMS
Can you do a '$ tcpip show arp' on all three nodes?
Oswald
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тАО12-20-2010 02:49 AM
тАО12-20-2010 02:49 AM
Re: ARP settings and problems in OpenVMS
I suggest you review your network settings carefully, particularly the subnet mask.
Alternatively, you could take some packet captures (e.g. with Wireshark) and work out what's different. That's likely to be harder work though.
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тАО12-20-2010 02:53 AM
тАО12-20-2010 02:53 AM
Re: ARP settings and problems in OpenVMS
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тАО12-20-2010 03:05 AM
тАО12-20-2010 03:05 AM
Re: ARP settings and problems in OpenVMS
It looks like the unreachable nodes have stale proxy ARP entries:
e.g. 10.114.37.237 00-00-0c-07-ac-01
whereas the working node has an ARP entry for the gateway.
10.114.3.1 00-00-0c-07-ac-01
I think it might be OK when the stale entries timeout. A few "SET NOARP ip", to flush them, should speed things up.
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тАО12-30-2010 03:03 PM
тАО12-30-2010 03:03 PM