Ethernet Switches & Routers

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Contributor
Posts: 30
Registered: ‎12-13-2010

CES 2024 rate limiting - max-burst question

Hi,

what is the reason for the different max-burst value handling:

ces2024(config-if-e1000-1/5)#rate-limit output 20000000 30000000

Average rate is adjusted to 20000000 bits per second.

ces2024#sh rate-limit interface 1/5

interface e 1/5

rate-limit output 20000000 30000000

ces2024(config-if-e1000-1/5)#rate-limit output 20000000 40000000

Average rate is adjusted to 20000000 bits per second.

ces2024#sh rate-limit interface 1/5

interface e 1/5

rate-limit output 20000000 33553920

ces2024(config-if-e1000-1/5)#rate-limit output 100000000 200000000

Average rate is adjusted to 100000000 bits per second.

ces2024#sh rate-limit

interface e 1/5

rate-limit output 100000000 33553920

ces2024(config-if-e1000-1/5)#rate-limit output 500000000 700000000 

Average rate is adjusted to 500000000 bits per second.

ces2024#sh rate-limit

interface e 1/5

rate-limit output 500000000 268431360

Frequent Contributor
Posts: 160
Registered: ‎08-07-2009

Re: CES 2024 rate limiting - max-burst question

Below is information from the NetIron Configuration Guide describing the "show rate-limit" output:

Displaying rate limit policies per interface
To display information about rate limit policies that are configured per interface, enter the following
command.
NetIron# show rate-limit
Syntax: show rate-limit
Output such as the following will display.
NetIron(config-if-e10000-1/1)#show rate-limit
interface e 1/1
rate-limit input 959904 2000000
rate-limit output 2986368 2000000


This display shows the following information.

TABLE 106 Rate limit interface parameters

This field...                     Displays...

rate-limit input                The average-rate and maximum burst rate configured for inbound traffic on

                                        the specified interface.

rate-limit output                The average-rate and maximum burst rate configured for outbound traffic on

                                        the specified interface.

Contributor
Posts: 30
Registered: ‎12-13-2010

Re: CES 2024 rate limiting - max-burst question

Hi Bill,

thx for your reply. My question was more in regard of the difference between the max-burst value I had configured on the CLI and the value that appear in the config:

ces2024(config-if-e1000-1/5)#rate-limit output 500000000 700000000

Average rate is adjusted to 500000000 bits per second.

ces2024#sh rate-limit

interface e 1/5

rate-limit output 500000000 268431360


Frequent Contributor
Posts: 160
Registered: ‎08-07-2009

Re: CES 2024 rate limiting - max-burst question

what version of firmware are you running. i seem to remember there was a defect with these values not displaying correctly in an earlier version.

Contributor
Posts: 30
Registered: ‎12-13-2010

Re: CES 2024 rate limiting - max-burst question

We are running 5.4.0c on that system. After a first quick search in the release notes I found some rate-limiting defects but not the one that could explain my observations.

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