is odd number of links in lag group ok

Wed May 16 23:32:34 UTC 2018

While it goes without saying that you need the same (can be 5!) number of links to each router in a multichassis LAG, what isn’t so obvious are things like port groups etc.

If you have an oversubscribed platform, you might need to look at running each wire in a LAG to different port groups, and then look at things like switch ASICs and span those as well.

Even try to span diverse slots/modules if you can.

But 5 6 or 4 per chassis shouldn’t make a huge difference. 

-Ben

> On May 16, 2018, at 3:48 PM, Wayne Bouchard <web at typo.org> wrote:
> 
> As others have noted, there can be implementation specific issues that
> you can't necessarily predict but most typically when I hear "odd vs
> even" discussions, usually the caveat is not a trunk but a redundant
> connection. Putting three links on router A and two links on router B
> obviously doesn't work well.
> 
>> On Tue, May 15, 2018 at 10:15:19AM -0500, Aaron Gould wrote:
>> I have (2) 10 gig links bundled in a lag to my upstream internet provider.
>> and we need more internet capacity.  Is it cool to add a third 10 gig to my
>> existing 20 gig lag internet connection?
>> 
>> 
>> 
>> I'm asking since I heard in the past something negative about odd numbers of
>> lag members.  .but I also have heard that it's not a big deal.  Let me know
>> please
>> 
>> 
>> 
>> -Aaron
>> 
>> 
>> 
>> 
> 
> ---
> Wayne Bouchard
> web at typo.org
> Network Dude
> http://www.typo.org/~web/