With shape average, you refill the Bc each Tc interval and Be is refilled only as overflow from Bc; with shape peak you refill both Bc and Be at each Tc interval; in latest codes, there is no more Tc value, and Bc/Be gets refilled almost instantly at ~ms level; the ms value may differ based on platform.
Can you please suggest us with which platform of router does not devide the one second in to 4 Tc? also can u suggest us with which latest platform of router that support howmany devisions in one sec?
It is both code and platform dependent; on the regular ISR/ISR G2 and new 4K routers, starting with 15.x the Tc is no longer fixed, nor is it specified. In general this kind of information you find out from the Cisco Business Unit thorugh your local Cisco team; however you don't really care about the exact value of the Tc, you can still configure saping considering the old algorithm, where Tc was fixed, now is better as Tc is way smaller.
Hi Cristain,
Can you please suggest us with which platform of router does not devide the one second in to 4 Tc? also can u suggest us with which latest platform of router that support howmany devisions in one sec?
Comments
Hi,
With shape average, you refill the Bc each Tc interval and Be is refilled only as overflow from Bc; with shape peak you refill both Bc and Be at each Tc interval; in latest codes, there is no more Tc value, and Bc/Be gets refilled almost instantly at ~ms level; the ms value may differ based on platform.
Regards,
Cristian.
Thanks a lot for the reply..
Pls help me to understand below terms in out put of show policy-map interface fastEthernet 0/0
i am aware of CIR, Bc & Be, but not clear what is showing in below output
R1#show policy-map interface fastEthernet 0/0
Target/Average Byte Sustain Excess Interval Increment
Rate Limit bits/int bits/int (ms) (bytes)
500000/500000 3000 12000 12000 24 1500
Adapt Queue Packets Bytes Packets Bytes Shaping
Active Depth Delayed Delayed Active
- 0 0 0 0 0 no
Hi Cristain,
Can you please suggest us with which platform of router does not devide the one second in to 4 Tc? also can u suggest us with which latest platform of router that support howmany devisions in one sec?
What version of code was the device running - this looks like early code 12.4T code?
It is both code and platform dependent; on the regular ISR/ISR G2 and new 4K routers, starting with 15.x the Tc is no longer fixed, nor is it specified. In general this kind of information you find out from the Cisco Business Unit thorugh your local Cisco team; however you don't really care about the exact value of the Tc, you can still configure saping considering the old algorithm, where Tc was fixed, now is better as Tc is way smaller.
thanks for the reply