Rate-limit

[eyeV]

Hi everybody.
I have two Summit x670 (15.4.1.3) switches and I'd like to limit inbound broadcast, multicast and unknown unicast packets on specific ports. So, I've configured rate-limit to 500pps.

config port 3 rate-limit flood broadcast 500
config port 3 rate-limit flood multicast 500
config port 3 rate-limit flood unknown-destmac 500Then I see the output of "show ports 3 stat" command. I see only 10-20 pps, but Flood Rate Exceeded counter is increasing and I have log messages like
Flood Rate Limiting activated on Port 3

[Stephane_Grosj1]

yes, this is expected because of the chipsets. Using Meters is a good way to solve that. There're match criteria for all BUM traffic types.

[M_Nees]

Hi Stephane,

i have a look at the current Release Notes 21.1.1 - and i found only these:

Configuration of Overhead-bytes in Calculating Rate-Limiting and Rate-Shaping

But this changes nothing regarding the lost or not reliable rate-limit threshold on G2 Switches.

Regards

[Stephane_Grosj1]

From what I recall, this code has been fixed in 21.1, I had a thread with engineering on that topic. I never tested it, so that would be worth checking in a lab first.

[M_Nees]

Hi Stephane,
i do not test because if nothing i written to the release notes engineering do not change the regarding code!

Do you think or know that anything would be changed ?

[Stephane_Grosj1]

Did you test with 21.1?