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Reasons for MLAG on Summits

Reasons for MLAG on Summits

Ilya_Semenov
Contributor
Hello, everybody!

I am an engineer at partner company and we are going to make a business event for our customers. My presentation is about MLAG on BD8806 with VRRP.

I suppose that I will be asked a question about why there is MLAG on Summit Switches, which could be stacked easily?

Could you please give me some ideas?

Many thanks in advance,

Ilya

12 REPLIES 12

Kawawa
Extreme Employee
This very question was asked about a year ago and I believe there are some very insightful responses that came from the community. I hope the following thread can help answer your questions: https://community.extremenetworks.com/extreme/topics/mlag-vs-stack-what-am-i-missing

Tripathy__Priya
Extreme Employee
Please find below this article link which explains the two tier MLAG design in details:

https://gtacknowledge.extremenetworks.com/articles/How_To/Sample-configuration-for-two-tier-MLAG/?q=...

Erik_Auerswald
Contributor II
You can even use two SummitStacks to create an MLAG pair. Stacking and MLAG are complementary features.

Hi Ilya,

for example, you can use 8 switches to form 4 MLAG pairs, or you can use two stacks of 4 switches each and create one MLAG pair.

Stacking can be viewed as a method to create a chassis-like virtual switch using standalone switches.

MLAG allows to connect one downstream device, e.g. a server, to two independent upstream devices using port sharing (aka LAG or port-channel).

Why would you set up MLAG between two chassis switches, if you can more easily use two modules inside the chassis for redundant connections?

Erik
GTM-P2G8KFN