Best was to utilize a core switch on a small to medium size office network

Hello experts.    I have configured VLAN's to get experience with Vlaning as well as of course take advantage of isolating traffic and making voice reliable.   It is working good but now I am introducing a couple of gig switches to help expanding needs of 1 gig ports on our servers.

Currently the core is utilized for trunks and all of my servers but I have grown and run out of ports.

Want to change the core to be strickly a trunking routing switch.    First I assume this is really the intent of a core switch and second it solves the port issues.

What I am having trouble with and am asking for help with is how to setup my trunks properly.    If I have enough ports do I have a separate trunk for each of my VLAN's.    Or do I group ports together to create a large single trunk.?  

I only required 4 physical trunks and I have 24 ports to work with on my core.  

Here are the trunk requirements

Main location has 1 core switch and a stack of three 10/100 (2 gig ports each)for clients and end devices

Second location 1 10/100 switch (2 gig ports)

Third Location 2 stacked 10/100 switch (2 gig ports each) for clients and devices and 1 GIG port switch for services in this location (non critical)

Forth Location is the new 1 gig switch that I want to utilize for all my servers.   (same physical location as core)

Thanks in advance

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Let's name 2 new core switches as coreA and CoreB. They should be running HSRP.

Location 1 switch will have 2 trunks connected one to coreA and another to coreB

Location 2 switch will have 2 trunks to core A and core B respectively.

Same goes for location 3 and 4.

So you see your every location switch have got 2 trunks, one to coreA and another to coreB.

Make sure, all the switches point to the HSRP IP of the coreA/B. In this way either of your core goes down, your network would be safe.

The trunks should be allowing all Vlans unless you want to restrict something for some reason.

You can do anyway you want, but above is the standard procedure.



Soulja53 6F 75 6C 6A 61 Commented:
Hopefully this will help. I have attached a diagram. As for vlans. Just put all of your vlan interfaces on the core switch. On your access layer switches, you will just assign the vlan you want the end devices in. Then just allow those vlans accross the appropriate trunks.

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Zoldy2000Author Commented:
on the first response I think you may have misunderstood as there is only one core switch...

As for the second post I understand the diagram but I still have some outstanding questions.

could or should I create a trunk for each VLAN?    Although perhaps not necessary my thoughts are if I have the ports then why not?  

Or can I simply use more than 2 ports for each link as shown in your diagram?

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Soulja53 6F 75 6C 6A 61 Commented:
The purpose of a trunk is to carry tags from multiple vlans. Otherwise the only thing you are creating are simple uplinks to the core switch. Are you planing on having a separate vlan for each location?
Soulja53 6F 75 6C 6A 61 Commented:
The etherchannels will allow load balancing over 2Gig bundles and trunk redundancy incase on of the links fail.
Zoldy2000Author Commented:
Right now my VLan's are by type of traffic.    


Soulja53 6F 75 6C 6A 61 Commented:
Okay, so if you for example have voice and video on the same switch, then you would need the etherchannels to be trunks to carry traffic for both of those vlans to the core to be routed by their designated vlan interface.
Zoldy2000Author Commented:
Okay last questions ... these trunks I am creating can it be more than 2 ports for performance?
Soulja53 6F 75 6C 6A 61 Commented:
Yes, those are the etherchannels I am referring to. You can add the two gig ports from the gig switch to each etherchannel and they will become a 2Gig port channel load balancing traffic across them.

For example:
On Core switch

interface port-channel 1
switchport trunk encapsulation dot1q
switchport mode trunk

interface Gig0/1
switchport trunk encapsulatrion dot1q
switch port trunk
channel-group 1 mode on

interface Gi0/2
switchport trunk encapsulatrion dot1q
switch port trunk
channel-group 1 mode on

Then do the same on the access layer switch.
Soulja53 6F 75 6C 6A 61 Commented:

switchport   not "switch port"
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