×

Warning message

  • Cisco Support Forums is in Read Only mode while the site is being migrated.
  • Cisco Support Forums is in Read Only mode while the site is being migrated.

Uplink switch config - Communication between them

Answered Question
Aug 6th, 2012
User Badges:

I am going to install UCS with two Catalyst switches (3560G and 3750G). Do I make a peer-link port-channel between them? Is it a requirement for communication to work?


Is it a requirement to cable the port-channel coming from the FIs to each of the two switches? Or can I cable two links to the same uplink switch?


Plase reply soon as I am running out of time..


Message was edited by: Atle Dale

Correct Answer by abbharga about 5 years 2 weeks ago

Hi Atle,


Yes we need a common l2 platforms for the vlans configure on the UCS since the two FI create two different fabric (A&B) and any traffic from A for blade on B and vice versa will need to be switched by the upstream switches. if you do not have a common point above the 3560 and the 3750 then you need to have a link between the two switches. Do make sure to allow the vlans (configure on ucs and others if required) on those ports as well as make sure the spanning-tree is not blocking them.


i am not very sure about your second questions, however on what ever i understand:

1) if you have multiple links going to the same switch its prefered to put them in a PO

2) since these switches are different and not in a VSS, you will need seprate Po for each switch.


Hope this helps!

./Abhinav

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (1 ratings)
Loading.
Correct Answer
abbharga Tue, 08/07/2012 - 01:09
User Badges:
  • Silver, 250 points or more

Hi Atle,


Yes we need a common l2 platforms for the vlans configure on the UCS since the two FI create two different fabric (A&B) and any traffic from A for blade on B and vice versa will need to be switched by the upstream switches. if you do not have a common point above the 3560 and the 3750 then you need to have a link between the two switches. Do make sure to allow the vlans (configure on ucs and others if required) on those ports as well as make sure the spanning-tree is not blocking them.


i am not very sure about your second questions, however on what ever i understand:

1) if you have multiple links going to the same switch its prefered to put them in a PO

2) since these switches are different and not in a VSS, you will need seprate Po for each switch.


Hope this helps!

./Abhinav

Actions

This Discussion