draracle
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Is it possible to bridge a data and voice network with a Cisco 871W-G-A-K9 cable modem/router?
I want to bridge a data network of 192.168.1.x with a VoIP network of 192.168.2.x. I do not have a server that supports dual NICs to do the bridging through Windows and buying a Layer-3 router is out of the question right now. However, I do have a Watchguard Firebox x500 and this Cisco 871W-G-A-K9 Cable Modem/Router (funny, we use a T1 here and there is this cable modem laying around)... I have not used bridging before and I realize this could top off a dumb question list, but, I am hoping someone could help me out here.
Thanks
Thanks
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You cant bridge unless both networks use the same IP address range.
If you just wish to use it for administration purposes then the easiest way might be to just get a computer with a couple of network cards and connect it to both networks. Dont bother configuring routing.
Then install VNC (http://www.tightvnc.com/) on the server to you can make a remote connection to the PC from your computer and then once on there can use it to perform any reconfiguration you require.
If you just wish to use it for administration purposes then the easiest way might be to just get a computer with a couple of network cards and connect it to both networks. Dont bother configuring routing.
Then install VNC (http://www.tightvnc.com/) on the server to you can make a remote connection to the PC from your computer and then once on there can use it to perform any reconfiguration you require.
ASKER
I plan on changing the subnet from 255.255.255.0 to 255.255.248.0 so that both networks are running on the same subnet. The VoIP range will be assigned a scope of 192.168.2.50 to 192.168.2.200 (my data already has a scope of 192.168.1.10 to 192.168.1.255 (but I can increase once the subnet mask gets changed). Perhaps, I am going at this the wrong way because you are saying I cannot bridge unless both networks use the same IP address range, but what if they fall under the same subnet?
Yes if you make that change you can bridge but why do you want to bridge anyway?
If you are going to bridge you might aswell just connect the networks together directly. The only porpose of bridging is to connect different types of network together.
If you are going to bridge you might aswell just connect the networks together directly. The only porpose of bridging is to connect different types of network together.
ASKER
I have two buildings, one which has the network setup correctly and efficiently which allows VoIP to run smoothly on it, and then there is this other one that has a variety of dasiy-chained switches and I haven't had the time to rebuild the network for this building. So, new building has a PBX (ip campus), PoE switch, and data switches that connect, via fiber, old building which has main PBX, servers, data switches, about a million various switches (some probably hidden in drop-ceilings even), firebox, T1 modems, etc. The idea is to have the building appear as one, which is easy to do with data, but now I will be mixing digital, analog, and IP phones. IP phones are in the new building and not the old one.
New Building Switch Old Buidling Switch
[settings] [settings] [VLAN0 DATA]->(can see)->\
[VLAN0 DATA]->[fiber]->[VLAN0 DATA] |
[VLAN1 VOIP] ->[fiber]->[VLAN1 VOIP] -> [PBX] <(the)-------------------- ---------- ---/
If my data connection is bridged with the 192.168.2.x range, could this work? I think the VoIP network will need to see the data gateway in order to have outside VoIP capabilities via NAT IP pointers.
Thanks,
New Building Switch Old Buidling Switch
[settings] [settings] [VLAN0 DATA]->(can see)->\
[VLAN0 DATA]->[fiber]->[VLAN0 DATA] |
[VLAN1 VOIP] ->[fiber]->[VLAN1 VOIP] -> [PBX] <(the)--------------------
If my data connection is bridged with the 192.168.2.x range, could this work? I think the VoIP network will need to see the data gateway in order to have outside VoIP capabilities via NAT IP pointers.
Thanks,
All pridging will do is effectivly the same as plugging one end of a network cable into the data VLAN and the other end into the VOIP VLAN. Getting a separate computer do do this is therefore pointless.
The best thing you can do is keep the two networks separated and get a router to route between them.
In the old building everything will connect to the data network and if it needs to communicate with VoIP the traffic will go via the router. You may have minor issues with this due to lack of QOS.
Then as you sort out the networking in the old office you can upgrade the switches to VLAN capable ones so phones and computers are directly connected to the correct VLAN.
As far as getting access to the PBX from the internet this can be problematic and SIP does not work well through NAT devices. You would be best off getting a 2nd network interface on the PBX and connecting it directly to the internet.
The best thing you can do is keep the two networks separated and get a router to route between them.
In the old building everything will connect to the data network and if it needs to communicate with VoIP the traffic will go via the router. You may have minor issues with this due to lack of QOS.
Then as you sort out the networking in the old office you can upgrade the switches to VLAN capable ones so phones and computers are directly connected to the correct VLAN.
As far as getting access to the PBX from the internet this can be problematic and SIP does not work well through NAT devices. You would be best off getting a 2nd network interface on the PBX and connecting it directly to the internet.
ASKER
Thanks for your interest on this one.