Wireless LAN-to-LAN Bridge: connectivity issues with some PCs
Posted on 2004-08-24
Hi, I have a wireless LAN-to-LAN bridge using two D-LINK DWL-2000AP access points set up in bridge mode with directional antennas facing each other about 100 ft away from each other. Configured speed is auto which auto-negotiates to 54Mbps.
Site 1 has an Internet Gateway, and a VoIP PBX system. Site 2 just has another Internet Gateway (different ISP). Both sites are operating on the same subnet (10.0.0.0/24). Here's the config:
Site1: (~30 PCs + ~30 IP Phones + 3 IP cameras)
Gateway ISP1: 10.0.0.254
Wireless Bridge: 10.0.0.243
Site2: (8 PCs + 8 IP Phones + 2 IP cameras)
Gateway ISP2: 10.0.0.1
Wireless Bridge: 10.0.0.244
On Site2, two PCs are using ISP2 (manually configured), the others are using the default configuration from the DHCP server on Site1 using ISP1 as their default gateway.
This setup has been running now for about 8 months without trouble. However, now we see ourselves in the need to provide the ISP2 connection to some users on Site1. No problem. Or so I thought. Some PCs on Site1 show no connectivity at all to Site2, others do. This problem is not limited to a certain OS or device type, it appears to be simply random, although static to the same devices.
Am I missing out on something fundamental, are there any tricks I should know of or try? What happens if within one or two months Site2 grows from 8 stations to 50+ (which is the plan)?
The next steps I've been thinking of is sniffing on the network, to see if I can make out where the communication gets lost. I've also been looking into separating the subnets from each other and employing a device such as a Cisco PIX at each side of the wireless bridge in order to route the packets instead of switching them!?
Any helpful comments are greatly appreciated.
Thanks in advance,