vlan creation

[arvindai]

I have two offices one in Class A IP addressing 10.200.X.X/ 255.255.0.0 & other office is using class B IP addressing 172.17.2.x/ 255.255.255.0. Can I use one 24 port switch and use 12 ports for office A & 12 ports for office B using VLANs

 

[watchguardmonkey]

Yes, you need to create 2 VLAN-id's, have a look here

http://www.cisco.com/en/US/products...figuration_guide_chapter09186a008007d7dd.html

 

[arvindai]

can I use two different class IP addresses to be used on a single switch using vlans

 

[Minue]

Hello
Switches don't care about level 3 address.You could even make it work without the VLAN.
Regards

 

[arvindai]

how the switch forward frames between the two class IP if I don't create VLAN

 

[Minue]

Hello
Switches will associate the ethernet ports to MAC address.It will learn all layer 2 address then it will forward packets base on that.
The VLANs are cleaner because later on,if you decided you can put in a router and allow routing between the 2 subnets.
Hope this helps.
Regards

 

[plshlpme]

without the vlans and the router the two subnets will not be able to communicate with each other...

 

[tdd97]

Another option would be to buy a switch that supports layer 3 vlans, where you can assign ip address to a vlan. Cisco, HP and Extreme are to vendors that I know support that feature. That way you will not need a router and can forward traffic between to the two vlans.

 

[arvindai]

If I get L3 switch than is it possibe to create intervlan routing between the class A & class B offices's network.

 

[plshlpme]

ok how are these two sites laid out now?

office A, and Office B...
a: are they at the same physical location?
b: do you have a router?

 

[Minue]

Hello
For the intervlan routing.The layer 3 switch will work or you can use a router as well.An even cheaper solution is to put some of the ports in multi-vlan mode.I know some of the Cisco older switches ,support this feature.
Regards

 

[arvindai]

Hi plshlpme, the two offices are at the same physical location which are connected with their own respective routers. I just wanted to use a 24 gigabit switch for both the offices which are on different Class A 10.200.X.X/ 255.255.0.0 & other office is using class B 172.17.3.x/255.255.255.0 IPs. both offices are connected to different Internet gateway & servers