Solved

stacking Catalyst 3650

Posted on 2016-12-01
20
56 Views
Last Modified: 2016-12-08
I posted a simiular question before but now I have model numbers. How should I stack my 3x 3650's? Is this setup OK ? This will be going to another stack on a different floor. Should I configure an IP for each switch? Should I have trunks going to the first stack from each of the 3 switches? Anything I need to know, anything I'm missing?

h.png
0
Comment
Question by:Shark Attack
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 10
  • 10
20 Comments
 
LVL 30

Expert Comment

by:Predrag Jovic
ID: 41909355
Setup is OK.
Should I configure an IP for each switch?
No
Should I have trunks going to the first stack from each of the 3 switches?
Not sure what you are asking. But, if I understand what you are asking - No. When switches are in stack you will actually have switches marked as 3 slots. (I guess you have stacking modules).
Gi1/0/1 - 2 - 3 etc
Gi2/0/1 - 2 - 3 etc
Gi3/0/1 - 2 - 3 etc
3 switches will actually become one switch.

Catalyst 3750-X and 3560-X Switch Software Configuration Guide - Managing Switch Stacks
Cisco Catalyst 3750-X and 3560-X Series Switches FAQ
0
 
LVL 3

Author Comment

by:Shark Attack
ID: 41909362
sorry for not being clear. I will have two sets of stacks. one on floor 1 and the 2nd on floor 2. The pic is of the stack 2. I will need a trunk between the two stacks.

So I should not configure any IP for the switch 2 or 3 ?
0
 
LVL 30

Expert Comment

by:Predrag Jovic
ID: 41909370
So I should not configure any IP for the switch 2 or 3 ?
No. Just stack Master have IP address.
I will need a trunk between the two stacks.
If you plan to create etherchannel between switches on 1 and 2 floor than it is recommended to create etherchannel with ports from 2 different stack members for better resiliency. (for example Gi2/0/49 & Gi3/0/49)
If you have just one uplink it does not really matter.
Commands start with
# switch ....
# show switch
You have more details on link above - managing switch stacks.
0
What Is Transaction Monitoring and who needs it?

Synthetic Transaction Monitoring that you need for the day to day, which ensures your business website keeps running optimally, and that there is no downtime to impact your customer experience.

 
LVL 3

Author Comment

by:Shark Attack
ID: 41909380
definitely, that makes sense. I will have ether-channels. I will use all switches. Thanks!
0
 
LVL 30

Expert Comment

by:Predrag Jovic
ID: 41909387
Number of etherchanne links:
Bundle links in numbers 2, 4, 8.
You can even configure 3 links in etherchannel and configure max number of links in etherchannel.
interface po1
 lacp max-bundle 2

Why 2, 4, 8 ? - Understanding EtherChannel Load Balancing and Redundancy on Catalyst Switches
0
 
LVL 3

Author Comment

by:Shark Attack
ID: 41909393
what do you mean by 2 4 8 ?
0
 
LVL 30

Expert Comment

by:Predrag Jovic
ID: 41909394
2 link
4 link
8 links
0
 
LVL 3

Author Comment

by:Shark Attack
ID: 41909396
So,

STACK 1                            STACK 2
SW1                                   SW1     - 2 links between SW1's
SW2                                   SW2    - 4 links between SW2's
SW3                                   SW3    - 8 links between 3s
SW4

thats what you mean ?
0
 
LVL 30

Accepted Solution

by:
Predrag Jovic earned 500 total points
ID: 41909401
2 interfaces in bundle:
**************************************
interface po1
!
interface range gi1/0/49, 2/0/49
 channel-group 1 mode active
!
**************************************

4 interfaces in bundle:
**************************************
interface po1
!
interface range gi1/0/49, 2/0/49-50, 3/0/49
 channel-group 1 mode active
!
**************************************

8 interfaces in bundle:
**************************************
interface po1
!
interface range gi1/0/49 - 50, 2/0/49 - 51, 3/0/49 - 51
 channel-group 1 mode active
!
**************************************

Any 2, 4 or 8 interfaces, not necessary those.
0
 
LVL 3

Author Comment

by:Shark Attack
ID: 41909403
oh i see, got it, thanks
0
 
LVL 30

Expert Comment

by:Predrag Jovic
ID: 41909410
You're welcome.
0
 
LVL 3

Author Comment

by:Shark Attack
ID: 41918182
did you mean to name the channel-groups 1's? probably not since you can only have 8 in a bundle.
0
 
LVL 30

Expert Comment

by:Predrag Jovic
ID: 41918303
To each ehterchannel you need to assign different number. If you need to have 2 etherchannels on one device, sure you need to have different numbers (e.g Po1 and Po2). You can use the same numbers on every switch if you want, numbers are locally significan (only on switch itself), does not have to match to the number on the other switch.
0
 
LVL 3

Author Comment

by:Shark Attack
ID: 41918322
so if I create etherchannels po1 po2 and po3 from the floor 1 stack i will need three trunks to the stack 2 on the Floor 2, right? there is no other way i can do this
0
 
LVL 30

Expert Comment

by:Predrag Jovic
ID: 41918332
so if I create etherchannels po1 po2 and po3 from the floor 1 stack i will need three trunks to the stack 2 on the Floor 2, right?
Why would you create 3 ethechannels between 2 switches?
Create just one. Take 4 interfaces from stack and bundle it into port channel, that's it.
Do the same on the neighbor device and connect those two together.

How many interfaces you want to bundle into etherchannel?
0
 
LVL 3

Author Comment

by:Shark Attack
ID: 41918341
you mentioned, 2, 4 and 8 bundles each from stack 1 (one logical switch) that's three bundles all together since I can't bundle more then 8 links together. So I will have 3 port-channels on stack 1  and I need to connect that to stack 2 on floor 1.
0
 
LVL 3

Author Comment

by:Shark Attack
ID: 41918348
unless you meant to pick 2, 4 or 8 and create one ether-channel
0
 
LVL 30

Expert Comment

by:Predrag Jovic
ID: 41918349
From one stack to other stack create just one etherchannel per switch.

I was taking that you should create stack with 2 OR 4 OR 8 interfaces. Meaning was NOT TO create etherchannel with for example 3 interface (or 5 etc). Please read Cisco article on one of previous posts for detailed explanation why not to create bundle of 3 interface in etherchannel.
0
 
LVL 30

Expert Comment

by:Predrag Jovic
ID: 41918350
That's exactly what I meant.
:)
0
 
LVL 3

Author Comment

by:Shark Attack
ID: 41918352
ok, thats what I was confused about. and trunk across the stacks and that should do it
0

Featured Post

Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Question has a verified solution.

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

During and after that shift to cloud, one area that still poses a struggle for many organizations is what to do with their department file shares.
Powerful tools can do wonders, but only in the right hands.  Nowhere is this more obvious than with the cloud.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
As a trusted technology advisor to your customers you are likely getting the daily question of, ‘should I put this in the cloud?’ As customer demands for cloud services increases, companies will see a shift from traditional buying patterns to new…

707 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