Hi, Have just encountered a situation where a 1GB/s customer sending me ~800Mb/s of traffic caused a number of Aggregated Interfaces running LACP on EX series switches to start flapping.
The switches themselves are all interconnected using 2 x 1GB ae's. There's no spanning tree in the network. The customer has explained they did something which caused a storm in their network, which fed into us. We have both storm control (which triggered, but was only configured to drop traffic, not disable ports) but also an ingress filter of 100Mb/s This policer seems to have worked, but other switches upstream that saw the ~100Mb/s of "bad" storming traffic also started flapping their LACP interfaces. JTAC thus far has given me a few vauge answers like "lots of traffic could swamp the CPUs". No doubt there was lots of mac flapping - but I'd have thought that, bad though it is, it shouldn't cause the CPU to forget to do its other tasks like keep LACP alive. Anyone encountered anything like this before? Any ways to mitigate? As one of the fixes, I'll look at enabling storm control to shut down the customer's port. I'd much rather just let the customer go nuts with their 100Mb/s limited storm though. If anyone's interested, PM me privately and I'll let you know the final outcome of the JTAC case (if there is one) Regards, Tim _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
