[j-nsp] EX series - LACP flapping during ethernet storm.

[Chuck Anderson]

On Thu, Oct 20, 2011 at 02:57:04PM +0800, Mark Tinka wrote:
> On Thursday, October 20, 2011 11:52:32 AM Chuck Anderson 
> wrote:
> 
> > This is why when given a choice I always like to design
> > L2 networks to not require dynamic protocols where
> > possible.  E.g. rely on autonegotiation's Remote Fault
> > Indication (RFI) or Far End Fault Indication (FEFI)
> > rather than using BFD/UDLD/CFM, use static link
> > aggregation rather than LACP, use Virtual Chassis with
> > distributed static AE interfaces rather than use MC-LAG
> > or STP, etc.
> 
> Can you use BFD on pure Layer 2 links?
> 
> We've been running LACP for years and had no (major) 
> problems. Chances are that if your CPU is thrashing enough 
> to affect LACP, you're going to be having other problems 
> anyway.
> 
> While on the subject, I think LAG's on the EX3200/4200 is 
> moot. The ASIC's don't load share :-(.

Not true according to these:

http://forums.juniper.net/t5/Ethernet-Switching/EX4200-Aggregate-Hashing-Algorithm-Documentation/td-p/110130

http://forums.juniper.net/t5/Ethernet-Switching/EX2200-LACP-hashing-algorithm/m-p/107844#M4746

http://kb.juniper.net/InfoCenter/index?page=content&id=KB18219