Solved

How best to connect multiple Cisco Switches

Posted on 2015-02-19
8
164 Views
Last Modified: 2015-03-03
My small network has been humming along fine with about 45 nodes on a Catalyst 2960S switch for awhile.   We're having a MItel VOIP system put in soon and in order to accommodate all of the IP phones and POE, I've decided to use two Cisco SG300 switches.   My plan is to have all workstations/phones connect to the SG300's and all servers, printers and other devices connect to the 2960.    My question is:

How do I best interconnect these three switches?

Thanks in advance,
0
Comment
Question by:Tom F
  • 3
  • 2
  • 2
  • +1
8 Comments
 
LVL 50

Accepted Solution

by:
Don Johnston earned 500 total points
ID: 40619960
The easiest would be to connect each SG300 to the 2960.  You can use multiple 1g links and channel the links if you need more bandwidth.

But if all three switches are in the same rack, it would been a lot better (from a bandwidth and management perspective) to get additional 2960's and stack them creating a single, larger virtual switch.
0
 
LVL 10

Expert Comment

by:Natty Greg
ID: 40620356
use truck ports
0
 
LVL 1

Author Comment

by:Tom F
ID: 40620522
@Don, would there be any benefit to also connecting the two sg300's thus creating a loop/triangle?
0
PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

 
LVL 6

Expert Comment

by:Matt
ID: 40620644
Do NOT create loop!!!

CISCO 2960S will block port which would cause loop but it also best practice that you NEVER create loop no matter which switch you use. Loop can bring your network down.
0
 
LVL 50

Expert Comment

by:Don Johnston
ID: 40620869
would there be any benefit to also connecting the two sg300's thus creating a loop/triangle?

Not really.  Since the servers are connected to the 2960, that would imply the majority of the traffic would be going to the 2960.  So there's no benefit to having the SG300's connected directly.
0
 
LVL 1

Author Comment

by:Tom F
ID: 40621552
My only concern with just connecting the 300's to the 2960 is that it gives a single point of failure at the 2960.

I suppose I have to balance this with if I were to daisy chain the three and learn all about treespanning in the process.

thanks for the inputs!~
0
 
LVL 50

Expert Comment

by:Don Johnston
ID: 40621610
You don't necessarily have to learn all about spanning tree.  It's on by default and will prevent loops.  You just may have a sub-optimal path in the network.

That said, if all the servers are connected to the 2960, then you already have a single point of failure.

So I think connecting the 300's to the 2960 is still your best approach.
0
 
LVL 6

Expert Comment

by:Matt
ID: 40621628
Best option would be to have two 2960 switches, stack them together. Then you can connect small switches with 2 links - one to first member of the stack and one to the second member of the stack - so you can have more "bulletproof" network.

Stack also - power supply of the first switch to the one power line, power supply of the second switch to the second power line if you have them of course. And all this protected by UPS.

In this scenario in case of failure on one 2960 switch, you are still "alive".
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
esx multi vlans 3 83
P2P and MPLS 3 54
CMDB relationships for hardware assets 2 74
route-map permit with a number 1 19
I see many questions here on Experts Exchange regarding switch port configurations and trunks. This article is meant for beginners in the subject to help to get basic knowledge about Virtual Local Area Network (VLAN (http://en.wikipedia.org/wiki/Vir…
When posting a question about a Cisco ASA, Cisco Router or Cisco Switch, it can aid diagnosis if a suitably sanitised copy of the config is provided. It is much better to leave as much of the configuration as original as possible, as it could be tha…
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question