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Output queue on 2960 interfaces

alison.hou
Beginner
Beginner

I discovered when troubleshooting slowness problem that the Output queue  from show interface command on all 2960 interfaces was  0/0 (size/max). I know the default output queue is 0/40. Has anyone seen this before? Do you think the output queue 0 will affect the user experience? I had input QOS policy applied. see example configs at the bottom. 

thanks,

Alison

FastEthernet0/19 is down, line protocol is down (notconnect)
  Hardware is Fast Ethernet, address is 1caa.0724.2193 (bia 1caa.0724.2193)
  Description: VOIP-NETWORK DEVICES
  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Auto-duplex, Auto-speed, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/0 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     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
FastEthernet0/20 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 1caa.0724.2194 (bia 1caa.0724.2194)
  Description: VOIP-NETWORK DEVICES
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:01, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/0 (size/max)
  5 minute input rate 1000 bits/sec, 3 packets/sec
  5 minute output rate 6000 bits/sec, 5 packets/sec
     331988481 packets input, 55347772997 bytes, 0 no buffer
     Received 2169658 broadcasts (1917331 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 1917331 multicast, 0 pause input
     0 input packets with dribble condition detected
     541533210 packets output, 135457677788 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     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
FastEthernet0/21 is down, line protocol is down (notconnect)
  Hardware is Fast Ethernet, address is 1caa.0724.2195 (bia 1caa.0724.2195)
  Description: VOIP-NETWORK DEVICES
  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Auto-duplex, Auto-speed, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/0 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     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
FastEthernet0/22 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 1caa.0724.2196 (bia 1caa.0724.2196)
  Description: VOIP-NETWORK DEVICES
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:01, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 5
  Queueing strategy: fifo
  Output queue: 0/0 (size/max)
  5 minute input rate 8000 bits/sec, 16 packets/sec
  5 minute output rate 12000 bits/sec, 18 packets/sec
     490600745 packets input, 102759766474 bytes, 0 no buffer
     Received 1473577 broadcasts (952880 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 952880 multicast, 0 pause input
     0 input packets with dribble condition detected
     684985929 packets output, 143335978038 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     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

 

 

interface FastEthernet0/19
 description VOIP-NETWORK DEVICES
 switchport access vlan 100
 switchport mode access
 switchport voice vlan 200
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 priority-queue out
 mls qos trust dscp
 auto qos voip trust
 no cdp enable
 spanning-tree portfast
 service-policy input QOS-LAN
!
interface FastEthernet0/20
 description VOIP-NETWORK DEVICES
 switchport access vlan 100
 switchport mode access
 switchport voice vlan 200
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 priority-queue out
 mls qos trust dscp
 auto qos voip trust
 no cdp enable
 spanning-tree portfast
 service-policy input QOS-LAN
!

 

 

1 Reply 1

Hi ,

 

I think some one may configured it as hold-queue out 0. (i just tried this on a 65k and then it won't show up in config) . 

 

Please change it back to 40.

 

Thanks,

Madhu.

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