Switching

Hi All,

May i know the default action will do by QFX5100 if storm happen at access switch that connected to QFX5100 as per below config. Is it the QFX will shut down the interface automatically even i'm not configure any action? Appreciate someone feedback

root@test-vcf> show configuration forwarding-options
storm-control-profiles default {
    all;
}


{master:0}
root@Stest-vcf> show configuration interfaces ae67
description test;
mtu 9192;
aggregated-ether-options {
    minimum-links 1;
    link-speed 10g;
    lacp {
        active;
    }
}
unit 0 {
    family ethernet-switching {
        interface-mode trunk;
        vlan {
            members all;
        }
        storm-control default;
    }
}

I believe the default action is log only.  Maybe you could use the feedback button at the top of this URL to request the documentation for this be improved

https://www.juniper.net/documentation/en_US/junos15.1/topics/concept/rate-limiting-storm-control-understanding.html

Regards, Rich

Hi rccpgm,

It's look like the url that u given is more refering to EX series not for QFX.

Thanks

QFX should be the same as new EX - EX with ELS, like EX4300 or EX4600.

EX and QFX both are the same, the default would be log.

Storm control enables the switch to monitor traffic levels and to DROP broadcast, multicast, and unknown unicast packets when a specified traffic level is exceeded. That level is set to 80 percent of the available bandwidth of the interface, used by the broadcast and unknown unicast traffic streams, Storm control monitors the level of applicable incoming traffic and compares it with the level that you specify. If the combined level of the applicable traffic exceeds the specified level, the switch drops packets for the controlled traffic type

What exactly are unknown unicast packets?  Multicast and broadcast are easy, but I've always wondered what types of packets fall into the unknown unicast definition.

Rob

Unknown Unicast = destination MAC that is not known, and therefore flooded

Unknown Source MAC is learned, Unknown Destination MAC is flooded

To add to what rccpgm said, if you look at the mase definitions, that will help clarify more.

Unicast are individual streams of traffic sent to a single host address. When the frame is sent to to switch, if the switch has no knowledge of that host (recorded in the bridging table), then you have an unknown unicast.

A juniper summary can be found here: https://www.juniper.net/documentation/en_US/junos14.2/topics/concept/rate-limiting-unknown-unicast-forwarding-understanding.html