CIR config considering port speed

[snootalope]

Hello. I've seemed to confuse myself beyond rescue, so I need a little advice to bring me back.

Ok. From my Frame-Relay provider I have been given this information for my remote office 1750 router. Your PVC CIR is 128K, and your Port Speed is 256K.

So. Here's my question> On that router, do I configure the map-class frame-relay to look like this:

map-class frame-relay VoIP-256kbps
frame-relay cir 256000
frame-relay bc 2560
frame-relay be 0
frame-relay mincir 256000
service-policy output QoS-Policy-256kbps
frame-relay fragment 320

Or:

map-class frame-relay VoIP-256kbps
frame-relay cir 128000
frame-relay bc 1280
frame-relay be 0
frame-relay mincir 128000
service-policy output QoS-Policy-256kbps
frame-relay fragment 120

If I do the second one, how do I know that traffic will burst to port speed?? See, I've royaly confused myself this time..

Thanks
snoots

 

[IllegalOperation]

Do the first one. Always set it to the maximum speed. The CIR is what the provider only guarantees.

If you set your map class to 128K, for example, your not going to get anything faster even though the link can burst up to 256K....

 

[routerman]

I disagree with the last post, you'll end up with potential congestion problems when running at line speed. Also if this is VoIP link you must not go above CIR, as lost pckets cannot be tolerated.

Try starting with:

map-class frame-relay VoIP-256kbps
no frame-relay adaptive-shaping
frame-relay cir 128000
frame-relay bc 1280
frame-relay be 0
frame-relay mincir 128000
service-policy output QoS-Policy-256kbps
frame-relay fragment 160

 

[snootalope]

Let me ask ya this.. I haven't found anyone who can answer this for me yet..

Using the following information from my router using the show int s0/0 command, how can I found out my current kbps input?? Considering the bits and packets per second.. Is there a formula for this maybe?

30 second input rate 275000 bits/sec, 165 packets/sec
30 second output rate 15000 bits/sec, 81 packets/sec

"tis better to remain silent and be thought of as a fool..
then open your mouth and remove all doubt" Mark Twain

"I should of been a doctor.." Me

 

[routerman]

Using the figures you posted, the current input rate averaged over 30 seconds is 275k bits per second, or for bytes 275k/8 = 34.3 K bytes per second.

Is that what your after?