From: Ryan B (ryanb@pobox.com)
Date: Fri Feb 14 2003 - 14:00:08 GMT-3
Few things of note...
1) I would remove the "class-map ipTraff" and in the policy-map use "class
class-default"
2) "bandwidth 50" is saying to use 50kb/sec of bandwidth - have you tested
this configuration? Does it work? It should error out when you try to
apply the config since you are exceeding the mincir value
3) In the FRTS config you have no CIR defined and it defaults to 56k...
Also, the bc is not the burst size, it is the the amount of data to send per
Tc interval... This value is dependent on the type of data and the CIR of a
PVC... For your 9.6k PVC the value would be "Bc = CIR/8" (note that for
VoIP you would set it to "Bc = CIR/100" to reduce delay)
4) I generally set the burst (Be) to 25% of the CIR for non VoIP carrying
circuits, assuming of course that the access rate of the line is not equal
to the CIR. For voice, Be should be 0 (and it defaults as such)... Keep in
mind that the Bc is not the rate in kbps as you have configured. It is the
amount of excess data in bits to send during the first Tc interval where
congestion occurs. I guess you could calculate the Bc to an specific kbps
value by using the Tc ("Tc = Bc/CIR") to figure out what value for Be would
give you the desired 19.2kbps...
So I'd try something like this (though there could be errors in here, I'm
just spitting this out based on your config and my weak memory). Also, this
would not have you bursting to 19.2... Can't give you all the answers now
can I ;))
interface Serial5/1/1
service-policy output DLSW&IP
frame-relay class qos
class-map dlswTraff
match access-group 150
policy-map DLSW&IP
class dlswTraff
bandwidth percent 50
class class-default
bandwidth percent 50
map-class frame-relay qos
frame-relay cir 9600
frame-relay mincir 9600
frame-relay bc 1200
frame-relay be 2400
no frame-relay adaptive-shaping
access-list 150 permit tcp any eq 2065 any
There is an page on the Cisco site that covers this very well, something
titled "Configuring Frame Realy Traffic Shapping", but I don't have the URL
handy.
----- Original Message -----
From: "Sage Vadi" <sagevadi@yahoo.co.uk>
To: <ccielab@groupstudy.com>
Sent: Friday, February 14, 2003 6:16 AM
Subject: QoS: FRTS & CBWFQ
> All,
>
> Q) On R1 configure the QoS default for the frame-relay
> network to have a comitted information rate of 9600bps
> and a burst size of 19200bps. Configure DLSW traffic
> with 50% of the traffic followed by IP with 50%, apply
> this to the map class in the step above.
>
> My Config:
>
> interface Serial5/1/1
> service-policy output DLSW&IP
> frame-relay class qos
>
> class-map dlswTraff
> match access-group 150
> class-map ipTraff
> match access-group 1
>
> policy-map DLSW&IP
> class dlswTraff
> bandwidth 50
> class ipTraff
> bandwidth 50
>
> map-class frame-relay qos
> frame-relay bc 19200
> frame-relay mincir 9600
> no frame-relay adaptive-shaping
>
> access-list 1 permit any
> access-list 150 permit tcp any eq 2065 any
>
> Q) Does this seem to be correct config?
>
>
>
>
>
>
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This archive was generated by hypermail 2.1.4 : Sat Mar 01 2003 - 11:06:23 GMT-3