From: ccie candidate (ccie1@xxxxxxxxx)
Date: Tue Aug 13 2002 - 15:41:32 GMT-3
well
for your first question , in GTS what you define in the command traffic-shap ra
te is the CIR value then Bc then be
if you want to set the mincir for GTS use the command
traffic-shape adaptive mincir
for ex
traffic-shap rate 64000 6400 6400
traffic-shap adaptive 32000
!
for your second question
normally in the central site , you might have subif , you need to set the CIR p
er PVC for the value of the other end !
so if you have 1.5 interface in central and 64000 in branches , you have to set
the PVC in central to 64000 .
--On Tue, 13 Aug 2002 13:30:33 Volkov, Dmitry (Toronto - BCE) wrote: >Hello group, > >Can somebody clarify on it finally ????? > >1st Question:========== > >FRTS: 1)frame-relay CIR ; 2)frame relay MinCIR >GTS: 3)traffic-shape rate CIR > >Is CIR from command 3) the same as CIR from command 1) ??? >Or it has to be interpreted as MiCir (i.e. rate guaranteed rate obtained >from provider) ??? > >2nd Question:========== > >What CIR You have to configure on Central site if You have Central site >1544000 and remote 64000 ???? >CCO says: http://www.cisco.com/warp/customer/125/21.shtml >"If the central side has a upper limit of 256 kbps, you should use the >LOWEST upper limit value" > >Solie and some other guys (i.e. MADMAN) tell "set CIR to be the phisycal >port speed of the circuit at Central site" > >I did look at archives this year and didn't find any good explanation ..... > >3rd Question: ========== > >According to >http://www.cisco.com/warp/customer/125/traffic_shaping_6151.html and Solie : >Be (excess burst) is the number of excess bits to transmit during the FIRST >(???) interval (Tc) over and above Bc, once credit is built up. > >How Be has to be calculated, when we place Be under "frame-relay be" command >: >How many bits can be send over bc per Tc ?? or How many bits can we send >over CIR during 1 second (i.e. spread in time) ?????? >The difference is 8 times if Tc=125 ms ! > >Solie example: He did put Be 64000 on page 368 and 398 (so it doesn't look >like typo) - I absolutely don't understand this. > >Please explain that !!! > >CCO http://www.cisco.com/warp/customer/125/21.shtml said: PEAK = DLCI >maximum speed = (Bc+Be)/Tc = CIR + Be/Tc = AR > >if be=64000 sec and bc =8000 sec that is mean that AR = 576000bits/sec but >he mentioned that circuit on the far end only 64K. > >http://www.cisco.com/warp/customer/125/traffic_shaping_6151.html gives the >following example: >Circuit speed 192 K, Bc =8000 ; Tc=125 CIR 6400 ====> Be =192000/8 - 8000 >i.e. We can send 16000 bits over Bc 8000 bits during TC only (which is equal >rate 192K) ! > >4th Question: ========== > >CCO http://www.cisco.com/warp/customer/125/traffic_shaping_6151.html said >Frame-relay traffic shaping is enabled on the main interface, and it applies >to all DLCIs under that interface. We cannot enable traffic shaping only for >a particular DLCI or subinterface under the main interface. If a certain >DLCI has no map class attached to it, and traffic shaping is enabled on the >main interface, the DLCI is assigned a default map-class with CIR = 56000. > >So, If I enabled FRTS under physical interface I got default map class with >CIR=56000 on all DLCI / subinterfaces > >What if I have 100 DLCs/suniterfaces and I want to implement shaping only on >some of them ?? > >How to do it ??? >I see only one way to do it: put DLCIs where I want to implemet shaping >under particular subinterface and enable GTS on this subint. >Any comments ??? > > > >Thanks > >Dmitry
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