Hello,
I am having some trouble with shaping and output drops. I have the need to enable shaping on our edge router in order to bandwith limit our guest networks. I have shaping enabled with the following config:
class-map match-any tec-class-download
match access-group name tec-class-download
class-map match-any priority
match protocol ntp
match protocol eigrp
match protocol dns
match protocol telnet
match protocol icmp
match protocol echo
class-map match-any test
class-map match-any tec-class
match access-group name tec-class-download
match access-group name tec-class-upload
class-map match-all shape-wan
class-map match-all guest-download
match access-group name guest-download
class-map match-all staff-byod-download
match access-group name staff-byod-download
class-map match-any guest
match access-group name guest-download
match access-group name guest-upload
class-map match-any expedited
match dscp ef
class-map match-any video
match dscp af41
match dscp cs4
!
policy-map police-lan
class tec-class
police cir 750000 bc 100000 be 1000
conform-action transmit
exceed-action drop
violate-action drop
policy-map shape-lan
class tec-class-download
shape average 6500000
queue-limit 8192 packets
fair-queue
class guest-download
shape average 5250000
queue-limit 2048 packets
class priority
priority 5000
set dscp af31
class business
class video
priority 6000 1000
class expedited
priority 1000
class staff-byod-download
shape average 3000000
queue-limit 512 packets
class class-default
queue-limit 4096 packets
fair-queue
!
!
interface GigabitEthernet0/0
description LAN
ip address 10.10.10.1 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
ip virtual-reassembly in
ip policy route-map inet
duplex auto
speed auto
no mop enabled
service-policy input police-lan
service-policy output shape-lan
It all seems to work fine, but I am seeing a lot of output drops :
2921-gw-div-1#show policy-map interface g0/0 output
GigabitEthernet0/0
Service-policy output: shape-lan
queue stats for all priority classes:
Queueing
queue limit 64 packets
(queue depth/total drops/no-buffer drops) 0/4138/0
(pkts output/bytes output) 207832790/49073460695
Class-map: tec-class-download (match-any)
1929884057 packets, 2262373820395 bytes
5 minute offered rate 5730000 bps, drop rate 29000 bps
Match: access-group name tec-class-download
1929884137 packets, 2262373823263 bytes
5 minute rate 5730000 bps
Queueing
queue limit 8192 packets
(queue depth/total drops/no-buffer drops/flowdrops) 0/4315988/0/0
(pkts output/bytes output) 1925568712/2257298782306
shape (average) cir 6500000, bc 26000, be 26000
target shape rate 6500000
Fair-queue: per-flow queue limit 2048 packets
Class-map: guest-download (match-all)
1330263683 packets, 1622579329821 bytes
5 minute offered rate 5364000 bps, drop rate 52000 bps
Match: access-group name guest-download
Queueing
queue limit 2048 packets
(queue depth/total drops/no-buffer drops) 972/6277262/0
(pkts output/bytes output) 1323986464/1614272076524
shape (average) cir 5250000, bc 21000, be 21000
target shape rate 5250000
Class-map: priority (match-any)
157884546 packets, 26574459594 bytes
5 minute offered rate 27000 bps, drop rate 0000 bps
Match: protocol ntp
88549 packets, 6875982 bytes
5 minute rate 0 bps
Match: protocol eigrp
5741287 packets, 442058821 bytes
5 minute rate 0 bps
Match: protocol dns
122770488 packets, 23474269487 bytes
5 minute rate 26000 bps
Match: protocol telnet
181502 packets, 79748221 bytes
5 minute rate 0 bps
Match: protocol icmp
29102559 packets, 2571458823 bytes
5 minute rate 1000 bps
Match: protocol echo
201 packets, 50788 bytes
5 minute rate 0 bps
Priority: 5000 kbps, burst bytes 125000, b/w exceed drops: 0
QoS Set
dscp af31
Packets marked 157884598
Class-map: business (match-any)
41498376 packets, 15164255708 bytes
5 minute offered rate 21000 bps
Match: access-group name bellamy
41498376 packets, 15164255708 bytes
5 minute rate 21000 bps
Class-map: video (match-any)
29156440 packets, 18094909638 bytes
5 minute offered rate 0000 bps, drop rate 0000 bps
Match: dscp af41 (34)
29156376 packets, 18094905926 bytes
5 minute rate 0 bps
Match: dscp cs4 (32)
64 packets, 3712 bytes
5 minute rate 0 bps
Priority: 6000 kbps, burst bytes 1000, b/w exceed drops: 463
Class-map: expedited (match-any)
20796363 packets, 4423949121 bytes
5 minute offered rate 0000 bps, drop rate 0000 bps
Match: dscp ef (46)
20796363 packets, 4423949121 bytes
5 minute rate 0 bps
Priority: 1000 kbps, burst bytes 25000, b/w exceed drops: 0
Class-map: staff-byod-download (match-all)
183254517 packets, 219456875943 bytes
5 minute offered rate 153000 bps, drop rate 0000 bps
Match: access-group name staff-byod-download
Queueing
queue limit 512 packets
(queue depth/total drops/no-buffer drops) 0/437030/0
(pkts output/bytes output) 182817487/218884018447
shape (average) cir 3000000, bc 12000, be 12000
target shape rate 3000000
Class-map: class-default (match-any)
28186108575 packets, 31547070367404 bytes
5 minute offered rate 52976000 bps, drop rate 147000 bps
Match: any
Queueing
queue limit 4096 packets
(queue depth/total drops/no-buffer drops/flowdrops) 0/18560622/0/0
(pkts output/bytes output) 28290766615/31649670878148
Fair-queue: per-flow queue limit 1024 packets
Is there anyway I can disable shaping on class-default?
Dan.
