Need vlans setup?

[hydruid]

Hello Guys,

I have a small but growing network. I have not had any major problems in the last year until now. Every light on every switch in my network started blinking as fast as it possibly could, nonstop.

My first initial thought was virus/spyware/malware but when i started disabling ports to see where it was coming from, like I had done before, I couldn't trace it. It seems to move around.

I noticed that it would stop for a while but would start happening again at peak times.

All my switches are cisco 3560g's. There are two core switches in the server room, they connect to each other thru cat6. They each have 4 switches connected to them through gig fiber.

Recently I went from easily having 150 computers, to having more around 225 computer and roughly 40 nortel voip phones.

I am thinking that it is time to start setting up Vlan's and wanted to get your guy's opinion on the matter?

The only other thing I can think of, is that it's a stp problem.

Correctly asked questions will receive a better answer.

 

[unclerico]

it's tough to say exactly what is going on so you'll need to do some further detective work.
- look at the port utilization statistics for each port, especially the uplinks
- look at the system processor usage
- look at the system memory usage
- look at the spanning-tree summary to see how many times it has converged

VLAN's are always a good idea especially if you have voice and data running. it would also be a good idea to have your servers on a different vlan than your clients. if you have wireless, it should be on a different vlan.

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

 

[burtsbees]

Also, port security. I know it is a pain, but it would stop someone from plugging in their own switch and causing a loop with no STP turned on, which could also cause your issue.

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[hydruid]

Ok I will begin rolling out vlan's in the morning, including port security.

I have spent the weekend reading up on vlan's and will post tomorrow how things went




Correctly asked questions will receive a better answer.

 

[hydruid]

Do you see anything that I missed?

I didn't have a fiber SFP for switchF, so I used the fiber in switchE so everything will be in Vlan1

Correctly asked questions will receive a better answer.

 

[VinceWhirlwind]

Before "rolling out VLANs", spend a moment to consider whether your two "core" switches going to be both routing? Neither of them routing? One routing?
Can you replace them with 3750s which can be stacked in the "core", making your design much easier?

And when it comes to your links to the "edge" switches, are you going to have one VLAN per switch?