From: iSamuel (uniqsam@gmail.com)
Date: Sun Jan 18 2009 - 11:29:28 ARST
I have a question regarding FRTS with fragmentation and PQ. Hope someone can
help clarify.
If the requirement is to use frame-relay fragmentation (say to 640 bytes)
AND then PQ is needed to prioritize 192Kbps, we need service-policy inside
map-class.
If we use following policy-map for PQ, it introduces Burst size 4800bytes
inside service policy.
!
map-class frame-relay FRTS
frame-relay cir 512000
frame-relay bc 5120
frame-relay be 0
frame-relay fragment 640
service-policy output VOICE_PRIORITY
!
policy-map VOICE_PRIORITY
class VOIP
priority 192
!
!
Do we need to adjust/match the burst size in policy-map to match fragment
size in FRTS?
!
policy-map VOICE_PRIORITY
class VOIP
priority 192 640 <<<<< CIR=196kbps, Burst=640bytes??
!
==================
Before adding burst size
==================
#sh frame-relay pvc 402
PVC Statistics for interface Serial1/0/0 (Frame Relay DTE)
DLCI = 402, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE =
Serial1/0/0.124
input pkts 10939 output pkts 10181 in bytes 1602065
out bytes 1602074 dropped pkts 0 in pkts dropped 0
out pkts dropped 0 out bytes dropped 0
in FECN pkts 0 in BECN pkts 0 out FECN pkts 0
out BECN pkts 0 in DE pkts 0 out DE pkts 0
out bcast pkts 3826 out bcast bytes 1251305
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
pvc create time 3d10h, last time pvc status changed 3d10h
fragment type end-to-end fragment size 640
cir 512000 bc 5120 be 0 limit 640 interval 10
<<<<<<<<<<<<<<<<<<<<<<<<<<<<
mincir 256000 byte increment 640 BECN response no IF_CONG no
frags 247 bytes 35307 frags delayed 0 bytes delayed 0
shaping inactive
traffic shaping drops 0
service policy VOICE_PRIORITY
Serial1/0/0.124: DLCI 402 -
Service-policy output: VOICE_PRIORITY
Class-map: VOIP (match-all)
0 packets, 0 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: access-group name VLAN46
Queueing
Strict Priority
Output Queue: Conversation 40
Bandwidth 192 (kbps) Burst 4800 (Bytes) <<<<<<<<<<<<<<<<<<<<<<<
(pkts matched/bytes matched) 0/0
(total drops/bytes drops) 0/0
Class-map: class-default (match-any)
133 packets, 19159 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: any
Output queue size 0/max total 600/drops 0
=================
After adding burst size
=================
sh frame-relay pvc 402
PVC Statistics for interface Serial1/0/0 (Frame Relay DTE)
DLCI = 402, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE =
Serial1/0/0.124
input pkts 10956 output pkts 10198 in bytes 1604312
out bytes 1604351 dropped pkts 0 in pkts dropped 0
out pkts dropped 0 out bytes dropped 0
in FECN pkts 0 in BECN pkts 0 out FECN pkts 0
out BECN pkts 0 in DE pkts 0 out DE pkts 0
out bcast pkts 3831 out bcast bytes 1252940
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
pvc create time 3d10h, last time pvc status changed 3d10h
fragment type end-to-end fragment size 640
cir 512000 bc 5120 be 0 limit 640 interval 10
<<<<<<<<<<<<<<<<<<<<<<<<<
mincir 256000 byte increment 640 BECN response no IF_CONG no
frags 264 bytes 37584 frags delayed 0 bytes delayed 0
shaping inactive
traffic shaping drops 0
service policy VOICE_PRIORITY
Serial1/0/0.124: DLCI 402 -
Service-policy output: VOICE_PRIORITY
Class-map: VOIP (match-all)
0 packets, 0 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: access-group name VLAN46
Queueing
Strict Priority
Output Queue: Conversation 40
Bandwidth 192 (kbps) Burst 640 (Bytes) <<<<<<<<<<<<<<<<<<<<<<<<<<<<
(pkts matched/bytes matched) 0/0
(total drops/bytes drops) 0/0
Class-map: class-default (match-any)
149 packets, 21373 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: any
Output queue size 0/max total 600/drops 0
R4#
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