Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

cisco 2960s with flexstack

Posted on 2014-01-24
9
Medium Priority
?
577 Views
Last Modified: 2014-04-08
I have 3 2960s with flexstack features.  Can I connect those switches to the core like my diagram (see attached)?
Is there any config sample on how to configure the master and slave?

Thanks
Capture.JPG
0
Comment
Question by:leblanc
  • 4
  • 4
9 Comments
 
LVL 11

Assisted Solution

by:Miftaul
Miftaul earned 1600 total points
ID: 39808216
Are you stacking them or simply connecting them together.
With your diagram, stp is blocking some ports. You could make different core switch root for different VLAN.

Doing a "Show Switch" on any of the stacked switches will tell the current master.
Here is the Cisco documentation on 2960-S FlexStack - Link
0
 
LVL 1

Author Comment

by:leblanc
ID: 39808235
I want to stack them. From my understanding, with the flexstack, those 3 switches will act like one. Correct?
0
 
LVL 11

Assisted Solution

by:Miftaul
Miftaul earned 1600 total points
ID: 39808238
Yes, flexstack will make them act like one stacked switch fabric.
0
What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

 
LVL 1

Author Comment

by:leblanc
ID: 39808242
I am running hsrp on those core1 and core2. Then my connection for switch0 to core1 and switch3 to core2 shoudl work. Correct? Or does it have to be switch0 to core1 and switch0 to core2? Thanks
0
 
LVL 11

Assisted Solution

by:Miftaul
Miftaul earned 1600 total points
ID: 39808249
As long as its flexstacked, it is a single stacked switch. For HSRP, you still need to connect from the Master Switch0.
FlexStack is not a switch cluster.
0
 
LVL 1

Author Comment

by:leblanc
ID: 39808255
So let say the master is switch0, so I have to connect switch0 to core1 and switch0 to core2. Correct?

What's the difference between flexstack and switch cluster?
0
 
LVL 11

Assisted Solution

by:Miftaul
Miftaul earned 1600 total points
ID: 39808267
Yes exactly, you still need to connect to Switch0.

Here is the Cisco document on Stacking Vs Clustering - Link
0
 
LVL 47

Accepted Solution

by:
Craig Beck earned 400 total points
ID: 39808970
It doesn't matter which switch connects to the core switches if you stack the 2960s.

If you wanted to you could even use MEC to connect multiple links from multiple physical switches to each core.

So for example, you could create a PortChannel on switch 2 and core 1 and connect them together, then create a PortChannel on switch 3 and core 2 and connect them together.  It would work fine.  The master doesn't have to be used.

Cisco have a FlexStack stacking design guide which details best practices for connecting stacked switches.  This guide actually mentions NOT using the stack master to terminate uplinks if possible, especially in 3 or 4-switch stacks to minimize traffic disruption in the event of a stack-master failure.

Also, if you use two uplinks in a 4-switch stack, don't connect them to directly-connected switches, such as switch 1 and 2.  You should instead use switch [2 and 4], or [1 and 3], but not [1 and 2], or [2 and 3], or [3 and 4], or [4 and 1].  You don't have to do this, but it should make most efficient use of stack-bandwidth if you do.

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6406/white_paper_c11-578928.html

Specifically the "Recommended Deployment Strategies for Building FlexStack" section.
0
 
LVL 1

Author Comment

by:leblanc
ID: 39809378
Thank you very much for your inputs. It is certainly very helpful. I will look at the white papers in more details.
0

Featured Post

Ask an Anonymous Question!

Don't feel intimidated by what you don't know. Ask your question anonymously. It's easy! Learn more and upgrade.

Question has a verified solution.

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

This article explains the fundamentals of industrial networking which ultimately is the backbone network which is providing communications for process devices like robots and other not so interesting stuff.
In this article, the configuration steps in Zabbix to monitor devices via SNMP will be discussed with some real examples on Cisco Router/Switch, Catalyst Switch, NAS Synology device.
Michael from AdRem Software outlines event notifications and Automatic Corrective Actions in network monitoring. Automatic Corrective Actions are scripts, which can automatically run upon discovery of a certain undesirable condition in your network.…
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…
Suggested Courses

824 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