Layer2 switch questions. Shop talk, looking for good advice
Posted on 2009-02-13
2008 AD native
One domain One site
We have a mismash of switches all chained together to accomodate 250 users and 25 servers
We have an hp pro curve users on old 10/100 switches and we are integrating several layer2 power connect switches. They run spanning tree and I was wondering of how cabale these switches are.
If I VLAN out, I would need a router to router traffic. Is this correct? Example switch1 has a Vlan of 172.x.x.x would switch 4 know about this vlan? I am told this will not work, but wanted to be sure. Heck if the switches can talk to each other, why cant they let other switches know.
Question2: If I run 2 uplink cables between switches, without using LAG aggreagation, will the switches pass traffic on both uplinks? This is the way we have it now, but I suspect one link is being used, and spanning tree is blocking the other line via spanning tree. The concept I guess is like a server, you can only have one ethernet in each subnet (unless you nic team). I would hope it sees both routes, and use them. But it was told to me this would cause a routing loop, and spanning tree would block the extra line to prevent this.
We have initially planned to link each 10/100 user switch to the procurve AND have them link to each user switch. But as it is told to me, this will fail cause loops and cause ports to be blocked.
The solution would be a layer3 switch. The difference in price is $450 for L2 and $1500 for L3. I want to be sure before I spend the $$$$