internal switch traffic on router

Belkin N+ wireless router
February 16, 2011 at 03:10:56
Specs: Windows 7
I have a Belkin b/g/n router acting as NAT gateway to Internet. The router is connected to an internal switch to provide internet access to internal PCs. PROBLEM: traffic from the internal network (not destined for internet) is being passed through the Belkin router. This results in an extreme amount of traffic on the Belkin router, which frequently fails and brings down both Internet access AND internal network communication.

The only traffic that the router should see is that which is destined for the external network, for purposes of NATing, correct? Why all the unecessary traffic?


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#1
February 16, 2011 at 16:06:40
How are you arriving at this conclusion that its the switch sending traffic to the router?

The action you describe is that of a hub not a switch. A switch only sends traffic to the port identified as the one to send to from its mac address table. In other words only packets needing to go to the internet would go to the port connecting to the router.

I would suspect the switch isn't playing any part in the belkin going down. I would never buy a belkin or linksys after my personal experiences with them.

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#2
February 17, 2011 at 07:26:46
I am arriving at this conclusion because, if the Belkin router is A/C is unplugged, or it's ethernet disconnected from the switch, internal hosts are no longer able to communicate with each other. I am attempting to remove this single point of failure. The current setup follows:

Telco router (Class A IP)-> 8 port hub (providing external access to certain hosts) -> Belkin Wireless Router/Swtich (NATs to Class C IP) -> Procurve Switch (internal network for 50+ hosts)

DHCP is handled by a server on a separate internal server connected to the Procurve switch.

It would seem to me that removing the the Belkin router would only remove the Class C gateway, leaving the internal network intact and functioning. Am I missing something?


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#3
February 17, 2011 at 07:27:55
Note: we are currently spec-ing more robust router equipment.

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#4
February 17, 2011 at 08:41:07
post a ipconfig /all from one of the internet connected pcs.

removing a router should have no affect on the internal communication. Something is very wrong in this config. Do you have a local server? Does it host dns?

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#5
March 4, 2011 at 04:09:17
and I heard Protemac Meter is a good app for traffic monitoring, anybody used it?

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#6
March 4, 2011 at 08:34:24
buer please start your own thread. Thx

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