1.14.9 Example for Configuring Storm Control, not working? Highlighted

Created Oct 15, 2014 15:26:53Latest reply Nov 04, 2015 14:50:30 2748 2 0 0

This experiment seems to be easy, but I don’t think so. Practice with theory is a better way than learning theory alone. When I configure GE 0/0/1 of SwitchA with <storm-control multicast min-rate 1000 max-rate 2000>. I need to make sure the storm-control mechanism of SwitchA is OK.

So I install VLC media player and used a multicast server to connect GE 0/0/1. The multicast group IP address is 224.10.10.10. When I start multicast server, I can still receive multicast packets with the same quantity on GE 0/0/0 of RouterA.

The GE 0/0/1’s storm-control config is as below:

[SwitchA]display storm-control interface GigabitEthernet 0/0/1

PortName     Type      Rate      Mode Action   Punish-  Trap Log Int Last-

                       (Min/Max)               Status                Punish-Time

--------------------------------------------------------------------------------

GE0/0/1      Multicast 1000      Pps  Block    Normal   Off  On  90 

                       /2000                                        

GE0/0/1      Broadcast 1000      Pps  Block    Normal   Off  On  90 

                       /2000                                        

GE0/0/1      Unicast   1000      Pps  Block    Normal   Off  On  90 

                       /2000 

 Maybe the Min/Max value is too big, I decide to change it from 1000/2000 into 1/2.

[SwitchA]display storm-control interface GigabitEthernet 0/0/1

PortName     Type      Rate      Mode Action   Punish-  Trap Log Int Last-

                       (Min/Max)               Status                Punish-Time

--------------------------------------------------------------------------------

GE0/0/1      Multicast 1         Pps  Block    Normal   Off  On  90 

                       /2 

GE0/0/1      Broadcast 1000      Pps  Block    Normal   Off  On  90 

                       /2000                                        

GE0/0/1      Unicast   1000      Pps  Block    Normal   Off  On  90 

                       /2000

Now I’m too excited to see what will happen next. There is no blocking of packets. When I change Block into Shutdown, the Port is still up, besides, it shows unicast packet:61746 and multicast:0, which seems wrong. It should be multicast:61746. 

[SwitchA]display interface GigabitEthernet 0/0/1

GigabitEthernet0/0/1 current state : UP

Line protocol current state : UP

Description:

Switch Port, PVID :    1, TPID : 8100(Hex), The Maximum Frame Length is 9216

IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 4c1f-cc9f-217c

Last physical up time   : 2014-10-15 14:32:52 UTC-08:00

Last physical down time : 2014-10-15 14:32:52 UTC-08:00

Current system time: 2014-10-15 15:15:28-08:00

Hardware address is 4c1f-cc9f-217c

    Last 300 seconds input rate 0 bytes/sec, 0 packets/sec

    Last 300 seconds output rate 0 bytes/sec, 0 packets/sec

    Input: 84592020 bytes, 61746 packets

    Output: 136612 bytes, 1148 packets

    Input:

      Unicast: 61746 packets, Multicast: 0 packets

      Broadcast: 0 packets

    Output:

      Unicast: 0 packets, Multicast: 1148 packets

      Broadcast: 0 packets

    Input bandwidth utilization  :    0%

    Output bandwidth utilization :    0%

In a word, the storm-control of switch seems not working at all. Probably it’s a bug of eNSP? I don’t know. Hope some smart guy could tell me why and I’m really appreciated. Attached is related eNSP Lab file.

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user_113229  Mentor   Created Nov 04, 2015 14:50:30 Helpful(0) Helpful(0)

It's meaningless to use eNSP to test this kind of function, but I had no choice then.
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user_2790689  Expert   Created Oct 15, 2014 16:06:47 Helpful(0) Helpful(0)

Thank you.
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