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Ping problem

By akota ·
Hi all,

A Client machine is not able to ping to a particular server that is in a different vlan.
But the client machine is able to ping to all the other machines in the same Vlan as the server.
Also, the server is able to ping to the client machine.

The client machine is on static IP.

I checked the cables, and renewed the IP, but of no avail.

Help!!!!
Rgds
Arvind Kota

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Ping problem

by d.walker5 In reply to Ping problem

Virtual LANS are software definable through configuration software contained within the LAN switch. Since the client can connect to all the other nodes on the VIRTUAL LAN connected to the same server your problem is problibly switch related. Is Load Balancing a factor in your network? If no, than I suspect the problem is with the LAN switch. Does your VIRTUAL LAN span multiple network segments? If yes, are your switches layer 2, layer 3, or layer 4 ? VIRTUAL LANS built using layer 2 devicesonly distinguish between MAC layer addresses. As a result, LAN switches are able to offer the ?forward-if-not-local? internetworking logic of bridges. Your problem is with the network part of the IP address as configured on the client machine or with a software filter on the LAN switch. Post back any info in the application Event Log along with more info on the network installed. For example a Cisco router using DLSw will cause the problem you describe.

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Ping problem

by d.walker5 In reply to Ping problem

Ansewer 2 offers 2 excellent tools, however, switched LAN conections are established, used, and terminated in a matter of microseconds for most transmissions, it almost impossible to monitor in real time by these methods. On solution I have used is know as TRAFFIC DUPLICATION, or port mirroring. Traffic between the two ports is duplicated onto a tird port to which traditional LAN analyzers can be attached. This can be difficult to accomplish. If your not well versed in port duplication, I suggest you hire an consultant--you'll save time and money.

The problem seems to be with a switch software filter. If you have only one or two switches I view the connections on for each port--I'm sure you'll descover the problem there. If mutilple switches hire the consultant

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Ping problem

by JustAnAdmin In reply to Ping problem

I would suggest running a traceroute on it to see where the packing is stopping, or if it is moving along at all.

Secondly, a packetsniffer may also help you determine where the problem may be. Between these two tools, you should be able to get aclearer picture of what is happening.

Hope this helps!

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Ping problem

by scott.heath In reply to Ping problem

When you say it can't ping it, does it say "host not found" or "request timed out". It is possible that the server's DNS suffix is not in the search order. Let me know if there is anymore info that can help narrow down the problem.

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Ping problem

by Dutchman10 In reply to Ping problem

How is the network connection(s) configured on this server. I have found that a 2k server or 2k Pro box configured with 2 NIC's, each configured for a different VLAN, will not be able to respond to a ping from one side or the other. You can ping from the server, but not to it. If this similar to your configuration, try enabling IP routing. Use Regedit and goto HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters.
Enter a value of 1 in the IPEnableRouter Dword.
For more info, goto
http://support.microsoft.com/?kbid=230082

Good Luck,
Nate

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Ping problem

by R. A. Caluste In reply to Ping problem

Check the particular server's firewall setting if it has any. The firewall might be blocking the ping request and disallows the server from responding.

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