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Incorrect bandwidth when applying QoS

Hi all,

 

I'm trying to implement QoS on a router by reserving 5% bandwidth for traffic destined to port 992, and everything else gets the remaining 95%. The outgoing interface is G0/0, however its a VPLS WAN Link with 10 Mbps available bandwidth. Reserving 5% of 10 Mbps would mean 0.5 Mbps (500 Kbps) which should be enough for the amount of traffic flowing (its just secure Telnet).

It should have been a pretty straigh-forward config, however the show policy-map interface command shows the 5% bandwidth comes out to be 250 Kbps instead of 500 Kbps.

I've verified all the config and can't seem to figure out what's wrong. Specifically the bandwidth command is set to 10000 - which should be dictating the available bandwidth for calculation.

Can the wider community have a look at the config and some show outputs - maybe I'm missing out something.

 

Thanks in advance!

 

RT03#sh access-lists 150

Extended IP access list 150

    10 permit tcp any any eq 992 log

!

=====================================================================================

RT03#sh run class-map

Building configuration...

 

Current configuration : 185 bytes

!

class-map match-all CM_SECURE_TELNET

 description MATCH SECURE_TELNET TRAFFIC

 match access-group 150

class-map match-all ABC_WAN_Out

 match any

!

end

=====================================================================================

RT03#sh run policy-map

Building configuration...

 

Current configuration : 375 bytes

!

policy-map PM_SECURE_TELNET

 class CM_SECURE_TELNET

  bandwidth percent 5

 class class-default

  bandwidth percent 95

policy-map WAN_Shape10_Out

 class ABC_WAN_Out

  shape average 10000000

  service-policy PM_SECURE_TELNET

!

end

=====================================================================================

RT03#sh run int g0/0

Building configuration...

 

Current configuration : 236 bytes

!

interface GigabitEthernet0/0

 description WAN Side - VPLS

 bandwidth 10000

 ip address 192.168.100.12 255.255.255.0

 ip nbar protocol-discovery

 duplex full

 speed 100

 service-policy output WAN_Shape10_Out

end

=====================================================================================

RT03#sh int g0/0

GigabitEthernet0/0 is up, line protocol is up

  Hardware is CN Gigabit Ethernet, address is d867.d996.0b20 (bia d867.d996.0b20)

  Description: WAN Side - VPLS

  Internet address is 192.168.100.12/24

  MTU 1500 bytes, BW 10000 Kbit/sec, DLY 100 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full Duplex, 100Mbps, media type is RJ45

  output flow-control is unsupported, input flow-control is unsupported

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:00, output 00:00:00, output hang never

  Last clearing of "show interface" counters 5d04h

  Input queue: 1/75/0/0 (size/max/drops/flushes); Total output drops: 78

  Queueing strategy: Class-based queueing

  Output queue: 0/1000/0 (size/max total/drops)

  5 minute input rate 4000 bits/sec, 7 packets/sec

  5 minute output rate 1000 bits/sec, 3 packets/sec

     2976305 packets input, 1312616993 bytes, 0 no buffer

     Received 1352513 broadcasts (1255881 IP multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 1352512 multicast, 0 pause input

     1883400 packets output, 288952628 bytes, 0 underruns

     0 output errors, 0 collisions, 0 interface resets

     0 unknown protocol drops

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier, 0 pause output

     0 output buffer failures, 0 output buffers swapped out

RT03#

=====================================================================================

 

RT03#sh policy-map interface

 GigabitEthernet0/0

 

  Service-policy output: WAN_Shape10_Out

 

    Class-map: ABC_WAN_Out (match-all)

      1883946 packets, 287855045 bytes

      5 minute offered rate 1000 bps, drop rate 0 bps

      Match: any

      Queueing

      queue limit 64 packets

      (queue depth/total drops/no-buffer drops) 0/4294967014/0

      (pkts output/bytes output) 959134/46054872

      shape (average) cir 10000000, bc 40000, be 40000

      target shape rate 10000000

 

      Service-policy : PM_SECURE_TELNET

 

        Class-map: CM_SECURE_TELNET (match-all)

          0 packets, 0 bytes

          5 minute offered rate 0 bps, drop rate 0 bps

          Match: access-group 150

          Queueing

          queue limit 64 packets

          (queue depth/total drops/no-buffer drops) 0/0/0

          (pkts output/bytes output) 0/0

          bandwidth 5% (250 kbps)

 

        Class-map: class-default (match-any)

          1883946 packets, 287855045 bytes

          5 minute offered rate 1000 bps, drop rate 0 bps

          Match: any

          Queueing

          queue limit 64 packets

          (queue depth/total drops/no-buffer drops) 0/12/0

          (pkts output/bytes output) 1342657/187033881

          bandwidth 95% (4750 kbps)

 

    Class-map: class-default (match-any)

      0 packets, 0 bytes

      5 minute offered rate 0 bps, drop rate 0 bps

      Match: any

 

      queue limit 64 packets

      (queue depth/total drops/no-buffer drops) 0/0/0

      (pkts output/bytes output) 0/0

RT03#

 

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