VSP 7000 - v8.0.0 : How this works? ipmc-threshold-exceeded-cnt

DanielDelgado — Fri, 26 Apr 2019 19:43:20 GMT

Hello community!

Any one could tell me how ipmc-threshold works?

I am testing an VSP7254 switch. I need to know how this device works when getting to the MGID limits.

I am confused, becouse sending very few multicast flows, the threashold ipmc counter exceeded.

In my lab I send 1010 flows and the Receiver gets 1010 (with several packets lost..)

If I have a look at the values of ip igmp :

VSP_1:1#show ip igmp sender count
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Command Execution Time: Fri Apr 26 20:14:51 2019 UTC
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IGMP Sender Count on vrf GlobalRouter: 1010

VSP_1:1#show ip igmp sender count
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Command Execution Time: Fri Apr 26 20:15:42 2019 UTC
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IGMP Sender Count on vrf GlobalRouter: 1010

VSP_1:1#show sys mgid-usage
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Command Execution Time: Fri Apr 26 20:15:42 2019 UTC
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Number of MGIDs used for VLANs : (25)
Number of MGIDs used for multicast : (1010)
Number of MGIDs used for SPBM : (0)
Number of MGIDs remaining for VLANs : (4071)
Number of MGIDs remaining for multicast : (6890)
Number of MGIDs remaining for SPBM : (1024)

VSP_1:1#show ip mroute hw-resource-usage
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Command Execution Time: Fri Apr 26 20:15:42 2019 UTC
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====================================================================================================
Multicast Hardware Resource Usage - GlobalRouter
====================================================================================================
EGRESS INGRESS EGRESS INGRESS LOG MSG SEND TRAP SEND TRAP
REC IN-USE REC IN-USE THRESHOLD THRESHOLD ONLY ONLY AND LOG
----------------------------------------------------------------------------------------------------
1010 1010 0 0 false false false

VSP_1:1#show sys stats ipmc-threshold-exceeded-cnt
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Command Execution Time: Fri Apr 26 20:15:46 2019 UTC
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SourceGroupThresholdExceeded : 511
EgressStreamThresholdExceeded : 510

I looked for documentation about.. but I only found the cli command, What is the meaning of this output?

Thanks a lot!
Daniel Delgado.

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VSP 7000 - v8.0.0 : How this works? ipmc-threshold-exceeded-cnt