024812: Jul 6 22:45:45.686 MET-DST: %PM_PLATFORM-5-PORTDROP: Port TenGigabitEthernet3/2 dropped packets due to storm control 024857: Jul 7 03:20:52.531 MET-DST: %PM_PLATFORM-5-PORTDROP: Port TenGigabitEthernet3/2 dropped packets due to storm control
At 03:20 there was only cca. 400 Mbit/s of traffic on that interface (inbound traffic), so I am wondering how can that amount of traffic cause triggering of broadcast storm control(level 8@10G interface = 800Mbit of traffic). AFAIK that amount of broadcast traffic would cause major problems on device (cisco 6500).
Here are some additional informations:
show asic-version slot 3 Module in slot 3 has 3 type(s) of ASICs ASIC Name Count Version JANUS 2 (1.0) SSA 2 (8.0) ROHINI 4 (1.4)
show version Cisco IOS Software, s72033_rp Software (s72033_rp-ADVIPSERVICESK9-M), Version 15.1(2)SY1, RELEASE SOFTWARE (fc4)
cisco WS-C6506-E (R7000) processor (revision 1.0) with 983008K/65536K bytes of memory.
Is there any problem/bug with implementation of broadcast storm control on that type of linecard?
Storm control monitors incoming traffic over an interval of 1 sec and the input rate that you get in 'sh int <int ID>' is by default of the interval of 5 minutes and least can be 30 secs. So, at the time of the b/c traffic being suppressed the input rate of b/c would have surely been more than 800mbps for 1 sec interval.
My point is, if the load-interval on an interface is even the lowest, 30 secs, the input rate is the mean of 30 secs and does not imply the traffic rate for an interval of 1 sec which is the interval used by traffic suppression mechanism in storm-control.
To check the total discards due to storm-control, you may check the output of 'show int tengig3/2 counters storm-control.
You may check the document below for reading more about storm-control:
Tnx for reply. You are correct, I overlooked traffic storm control interval od 1 sec and input rate interval of 5 minutes, but I'm just wondering if that linecard has some issues with traffic storm control implementation. I have read that level of 0,34% broadcast traffic on 10G interface can crash the box, and I have broadcast storm control trap alarms triggered @ level 8.5 (that's huge amount of broadcast traffic).
show interfaces tenGigabitEthernet 3/2 counters storm-control
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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