December 22nd, 2011, 01:56 PM
Connecting 2 Networks to a Switch
I have a Linksys-Cisco SRW208P switch and I'm trying to use it to access 2 different networks. Originally I didn't think it was possible but I recently came across the same exact switch doing exactly what I'm trying to do. Network 1 is my primary network (192.168.x.x) which handles the majority of my traffic. I need to capture incoming traffic to a specified IP address on Network 2, but without preventing that traffic from being received by the destination device on network 2.
I'm assuming I would vlan 2 ports on my switch, one of which I would connect the Network 2 destination device, the other would connect my switch to the Network 2 switch, effectively creating a pass-through of sorts from Network 1 to Network 2. I just don't know how to set it up so I can access that traffic from a device on Network 1.
My networks look like this:
Net 1: 192.168.1.0/24
Net 2: 172.20.16.0/27
And I'm interested in traffic destined for 172.20.16.15. Any help would be appreciated.
Network 1 is a 172.20.16.128/27
December 22nd, 2011, 06:38 PM
You would need to setup a vlan for each network, and assign the proper ports to each VLAN. Make sure your switch is a Layer 3 switch.
January 2nd, 2012, 02:25 PM
I've been researching various L3 switches as well as various VLAN technologies and capabilities. Based on what I've read, some of which was from various Cisco product specs, it appears that what I'm trying to accomplish is covered under IEEE 802.1Q Static VLAN.
I have a Netgear FS726TP (switch specs) which says it supports up to 64 IEEE 802.1Q Static VLANs as well as up to 26 port-based VLANs.
Can I use an 802.1Q static VLAN and access traffic between my 172.20.16.0/27 network and 192.168.1.0/24 network?
Thanks for the follow up.
January 5th, 2012, 12:03 PM
Follow up question regarding your comment about needing a layer 3 switch. If my intention is to remain within my local network(s), being able to access the one device on my 172 net from my 192 net, would I still need a layer 3 device? In other words, the span of my VLANs wouldn't have to reach the internet, just being able to ping the next port over on my switch, which just happens to by on a 172 network.
Originally Posted by seack79