Question

Routing issue

Asked by: stevegw62

I have 2 Dlink DFL700 routers

We are using Terminal Services via a VPN which is fine.

We have a phone system(IP) that has a NIC

We can ping the Server and all workstaions, but we cant ping the NIC in the phone system

If I log onto the Router where the phone system is and use its ping utility, I can ping from there.

However if I ping from the  Source router or from a command prompt on a pc in the source network I cannot do it.

Can someone help

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Asked On
2006-10-01 at 08:04:04ID22009003
Topics

Miscellaneous Networking

,

Internet Protocols

Participating Experts
2
Points
500
Comments
9

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Answers

 

by: paradoxenginePosted on 2006-10-01 at 13:00:02ID: 17639100

If I've understood clearly what you're saying, probably you've got an issue with ICMP forwarding at the first router (the one at the phone system).
An IP network map would be useful to pinpoint the problem, but that would be the first thing to check. Can you ping other machines on the same subnet the Phone Server is?

 

by: stevegw62Posted on 2006-10-01 at 16:09:30ID: 17640027

Yes, I can.

I can site at a PC in Network one and ping all PCs in network 2 and vice versa.

Just cant ping the IP Phone system, but I can ping the IP Phone system from its router or a PC in the same building as it.

 

by: photograffitiPosted on 2006-10-01 at 17:31:25ID: 17640234

Are you sure that the IP Phone system has a default gateway? Is it pointing to the Dlink router that a VPN connection back to you?

 

by: stevegw62Posted on 2006-10-01 at 17:39:41ID: 17640258

Not sure if I know what you mean.

There is I think some sort of Option for a Gateway on the Phone System,
I will check with the guys installing the Phone System, maybe it is a simple as that.

I'll let you know.

 

by: photograffitiPosted on 2006-10-01 at 17:52:31ID: 17640293

Well, if you're pinging the IP Phone system from the router that is local to it... this will work because the router there has the same IP range as the phone system. But if you're pinging from the other router or from your PC's command prompt, the only way for the phone system to reach your IP is to forward the ping reply to its default gateway (which should be the local router near it).
So basically, the ping requests are likely reaching the IP Phone system but it has no idea where to send the ping replies.

 

by: stevegw62Posted on 2006-10-01 at 18:00:12ID: 17640329

So basically the Phone system must act the same as a PC and have a default Gateway, I have emailed the guys who install the Phone System and am waiting on an answer, but I would have thought surely they would have put a default gateway address correctly in there settings of the Phone system.

 

by: photograffitiPosted on 2006-10-01 at 18:07:17ID: 17640352

You would think so, but your symptoms are indicative of this very common problem. Good luck.

 

by: stevegw62Posted on 2006-10-24 at 04:30:01ID: 17794807

Thanks for that,

it was indeed just as you said.

The phone system works as a PC would work requiring a Gateway IP, being there router.

as easy as that

 

by: photograffitiPosted on 2006-10-24 at 06:41:49ID: 17795655

Glad it works now.

20120131-EE-VQP-002

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