Unsolved
This post is more than 5 years old
3 Posts
0
7873
September 6th, 2017 09:00
lacp on multiple switches
+------------------+ first cable
| switch core 1 |------------
+------------------+ +
+ single +-------------+
+------------| switch N |
+ lacp +-------------+
+------------------+ +
| switch core 2 |------------
+------------------+ second cable
I desire a situation like the above, where the "remote" switch has one lacp (two ports) and each cable connects to the core switches in which we configure a single lacp on each switch. I think that we need to use two core switches that support trunking (sees as one logical unit), is it correct? some suggestion on models that support this? now we use dell 5224 as core switches and I see that 6224/6248 support that configuration, correct?
thanks
vt1012
212 Posts
0
September 6th, 2017 11:00
You are correct. There needs to be some sort of switch connection between the two core switches that allow them to be seen as a single switch by all other devices on the network. The three most prevalent protocols used for this are Stacking, MLAG, and VLT. Which one you select will depend on what your switches support, and then on preference. Most switches support Stacking. Most switches also support either MLAG or VLT, but not both. You would need to review the switch features and specifications in order to see what each specific switch supports. For example, most Dell N-series switches will support stacking and MLAG, while most Dell S-Series switches support stacking and VLT. I believe the 54xx and the 62xx both support stacking only, which should work for this scenario.
Hope this helps.
-B
matteobiagini
3 Posts
0
September 7th, 2017 07:00
I understood. So, I can create a unique LACP per each switch N and then connect one cable to "switch core 1" and one to "switch core 2" and, as switch core 1-2 are in stack, I create one port-channel with interfaces 0/g1 and 1/g1; like:
==== switch core 1-2 ====
interface port-channel 1
description "test"
switchport mode trunk
interface ethernet 0/g1
channel-group 1 mode auto
interface ethernet 1/g1
channel-group 1 mode auto
on client only one LACP with two ports, each connected to one core switch.
correct? (because I am not sure if the network design is correct)
thanks
matteobiagini
3 Posts
0
September 8th, 2017 02:00
Nice. Thanks a lot for the explanation.