10-08-2002 11:23 PM - edited 03-12-2019 09:05 PM
hi,
my problem:
i configured a llq with 85 kb/s for voip traffic - but i have drops within this queue.
the link is a 384kb/s point-point link.
if i have drops in the llq-queue: dies this automaticly mean the voip-traffic
is greater than my 85 kb/s ???
how can i calculate the "Burst" after the "priority 85" keyword - could this be a
reason for the droped packet ???
thanks for answer !
r-wienstr1#pvc 42
PVC Statistics for interface Serial0/0 (Frame Relay DTE)
DLCI = 42, DLCI USAGE = LOCAL, PVC STATUS = STATIC, INTERFACE = Serial0/0
input pkts 73429 output pkts 72900 in bytes 13316690
out bytes 12682375 dropped pkts 0 in pkts dropped 0
out pkts dropped 745 out bytes dropped 201392
late-dropped out pkts 745 late-dropped out bytes 201392
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 0 out bcast bytes 0
5 minute input rate 4000 bits/sec, 7 packets/sec
5 minute output rate 2000 bits/sec, 8 packets/sec
pvc create time 23:20:22, last time pvc status changed 23:20:16
service policy policy_384
Serial0/0: DLCI 42 -
Service-policy output: policy_384
Class-map: dedect_voip (match-any)
58979 packets, 12003404 bytes
30 second offered rate 0 bps, drop rate 0 bps
Match: ip precedence 5
58979 packets, 12003404 bytes
30 second rate 0 bps
Queueing
Strict Priority
Output Queue: Conversation 40
Bandwidth 85 (kbps) Burst 10000 (Bytes)
(pkts matched/bytes matched) 58979/12003404
(total drops/bytes drops) 745/201392
Class-map: dedect_premium (match-any)
84 packets, 4368 bytes
30 second offered rate 0 bps, drop rate 0 bps
Match: ip precedence 4
!
!
class-map match-any dedect_premium
match ip precedence 4
class-map match-any dedect_voip
match ip precedence 5
class-map match-any dedect_gold
match ip precedence 3
class-map match-any dedect_silver
match ip precedence 2
!
!
policy-map policy_384
class dedect_voip
priority 85 10000
class dedect_premium
bandwidth percent 30
class dedect_gold
bandwidth percent 20
class dedect_silver
bandwidth percent 10
class class-default
fair-queue
!
!
interface FastEthernet0/0
no ip address
speed 100
full-duplex
!
interface FastEthernet0/0.1
encapsulation dot1Q 1 native
ip address 10.20.205.250 255.255.255.0
ip policy route-map set_ip_prec
!
interface FastEthernet0/0.2
encapsulation dot1Q 2
ip address 10.20.253.102 255.255.255.248
ip policy route-map set_ip_prec
!
!
interface Serial0/0
description Int S0/0 - Verbdg. zum BR-LinzLand
bandwidth 384
ip address 10.20.255.50 255.255.255.252
encapsulation frame-relay IETF
load-interval 30
no keepalive
frame-relay traffic-shaping
frame-relay map ip 10.20.255.49 42
frame-relay interface-dlci 42
class 384k
!
!
map-class frame-relay 384k
frame-relay cir 365000
frame-relay bc 3000
frame-relay be 0
frame-relay mincir 365000
service-policy output policy_384
frame-relay fragment 400
!
route-map set_ip_prec permit 10
match ip address voip
set ip precedence critical
!
route-map set_ip_prec permit 20
match ip address premium
set ip precedence flash-override
!
route-map set_ip_prec permit 30
match ip address gold
set ip precedence flash
!
route-map set_ip_prec permit 40
match ip address silver
set ip precedence immediate
!
route-map set_ip_prec permit 50
set ip precedence priority
!
!
ip access-list extended gold
permit tcp any range 8001 8005 any
permit tcp any any range 8001 8005
permit udp any eq 6502 any
permit udp any any eq 6502
permit tcp any eq 8100 any
permit tcp any any eq 8100
permit tcp any eq login any
permit tcp any any eq login
permit ip host 10.18.19.39 any
ip access-list extended premium
permit tcp any range 13301 13364 any
permit tcp any any range 13301 13364
permit tcp any eq 1478 any
permit tcp any any eq 1478
permit tcp any eq 1477 any
permit tcp any any eq 1477
permit tcp any eq 1998 any
permit tcp any any eq 1998
permit tcp any range 7000 7025 any
permit tcp any any range 7000 7025
ip access-list extended silver
permit tcp any eq 8080 any
permit tcp any any eq 8080
permit tcp any eq www any
permit tcp any any eq www
ip access-list extended voip
permit udp any range 4352 13055 10.17.4.0 0.0.0.255
permit udp any 10.17.4.0 0.0.0.255 range 4352 13055
!
10-15-2002 07:11 AM
Yes, it seems like you are exceeding your 85kbps and that is the reason for the drops. I don't think that the burst is the problem. I would suggest that you up the 85kbps to something higher. You won't be setting that bandwidth aside, during normal operations, queueing only goes into affect once the pipe starts getting full. Plus, depending on what codec you are using you can fill that 85kbps up pretty fast.
Rick
10-15-2002 09:20 AM
Here's a link on LLQ in a frame environment that might be helpful:
http://www.cisco.com/warp/public/788/voice-qos/voip-ov-fr-qos.html
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