Hi James, 

We're using LACP on our network and it's good. I can't comment on the 
comparision times because we've only run LACP. 

When you have your templates in Netsight Management Suite, the overhead just 
goes away. With Policy Islands and standardised LACP constructions, it's easy. 
We have Many(TM) edge switches.

I could only suggest speaking with the Enterasys pre-sales Engineer(s) here and 
listening to their advice.

Sincerely,  

Jolyon Ansuz

Senior Network and Communications Administrator
Communications Infrastructure
Information Technology
University of New England
Armidale NSW 2351 

P: +61 2 6773 3568
F: +61 2 6773 3424 
M: +61 412 735 836

"Most of the things worth doing in the world had been declared impossible 
before they were done.", Louis D. Brandeis

-----Original Message-----
From: James Andrewartha [mailto:[email protected]] 
Sent: Monday, 25 November 2013 12:58
To: Enterasys Customer Mailing List
Subject: [enterasys] LAG vs MSTP for redundant switch links

Hi list,

I'm setting up dual fibre links between our core and edge switches, and was 
pondering whether to set up link aggregation or use MSTP to balance the traffic 
across the links. My primary concern is for redundancy, not extra bandwidth (I 
just checked cacti, and most don't sustain 100Mb/s).
How do MSTP and LACP compare for failover times?

The other thing about LACP is the config overhead of having to set the 
aadminkey on the physical and LAG ports plus ensuring the VLANs match.
Whereas with MSTP I don't have to worry about the LAG port, and can just set a 
port priority on the SID to balance the traffic if required.

I'm leaning towards MSTP, but every man and his dog seems to have a 
spanning-tree meltdown story. All the switches will be Enterasys (S4 at the 
core, B3/B5 at the edge) so you'd think it should all work fine.
Opinions?

Thanks,

--
James Andrewartha
Network & Projects Engineer
Christ Church Grammar School
Claremont, Western Australia
Ph. (08) 9442 1757
Mob. 0424 160 877

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