From: kpalmer (kip.palmer@verizon.net)
Date: Sat Sep 14 2002 - 01:19:05 GMT-3
Greetings-
Q: The command "ip priority <udp port> <udp port> <bandwidth>" for
PQ-WFQ is *suggested to be set at the MINCIR
which is usually the LSA/CIR provided. So the calculation is:
*Cisco Press; Cisco Voice over Frame Relay, ATM, and IP;pg.,355.
256Kbs * .75 = max-reserved bandwidth
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256000 * .75 = 192000 max-reserved bandwidth default
So is this the, "must not exceed 75 percent of the available bandwidth
on the interface", Cisco refers to
in the IOS QOS Config Guide, and is this calc exam worthy?
This is straight off the CCO CD IOS v12.2 PQ-WFQ Examples. If the calc
above is correct, then isn't this
exceeding the default bandwidth allocation w/ no mention of a
*max-reserved bandwidth* adjustment??
I mean, if it were below the max bandwidth percentage, I could try to
figure out how they derive at 210kbs.
map-class frame-relay voip
frame-relay cir 256000
frame-relay bc 2560
frame-relay be 600
frame-relay mincir 256000
frame-relay fair-queue
frame-relay fragment 250
frame-relay ip rtp priority 16384 16380 210<--------???? 256k * .75 =
192k
interface Serial5/0
ip address 10.10.10.10 255.0.0.0
no ip directed-broadcast
encapsulation frame-relay
no ip mroute-cache
load-interval 30
clockrate 1007616
frame-relay traffic-shaping
frame-relay interface-dlci 100
class voip
frame-relay ip rtp header-compression
frame-relay intf-type dce
Cisco IP QOS Configuration Guide IOS v12.2
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You can configure class policies for as many classes as are defined on
the router, up to the maximum of 64. However, the total amount of
bandwidth allocated for all classes included in a policy map must not
exceed 75 percent of the available bandwidth on the interface. The other
25 percent is used for control and routing traffic. (To override the 75
percent limitation, use the max-reserved bandwidth command.) If not all
of the bandwidth is allocated, the remaining bandwidth is proportionally
allocated among the classes, based on their configured bandwidth.
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What am I missing?
Any help with clarification would be huge!!
Thanks,
KPalmer
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