05-17-2007 09:13 AM - edited 03-03-2019 05:01 PM
I'm having trouble understanding the output queue information following. Is there a good document for understanding all this information? Specifically what is the Available Bandwidth statement telling me in this sho command?
Thanks,
Andy
Dupont_2801Router#sho int ser 0/1/0
Serial0/1/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: $FW_OUTSIDE$$ES_WAN$
Internet address is 172.20.201.98/30
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 16/255, rxload 13/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:01, output 00:00:01, output hang never
Last clearing of "show interface" counters 00:22:45
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/55/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 541 kilobits/sec
5 minute input rate 84000 bits/sec, 50 packets/sec
5 minute output rate 98000 bits/sec, 48 packets/sec
54469 packets input, 11952629 bytes, 0 no buffer
Received 136 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
53426 packets output, 13689288 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
Solved! Go to Solution.
05-17-2007 09:36 AM
Input and output queues are used in a router to temporarily hold packets if there is any congestion on the Lan/ Wan links. If the interface is busy sending out packets and a new packet arrives, the packet is kept in queue unless the interface sends out the previous packet. There are various QoS queuing tools available (CQ, PQ, FIFO, WFQ, CBWFQ, LLQ) which decide the manner in which packets need to be sent out the interface. The default queuing techique is Weighted Fair queueing (WFQ), hence the output shows "Queueing strategy: weighted fair".
Output queue: 0/1000/64/0 (size/max total/threshold/drops. The above line indicates there are no packets in the queue, the total size of the queue is 1000, each queue size is 64 and there are no drops so far. In regards to Available Bandwidth, I would say that your config would have QoS configured with BW allocated to different classes. Since the total BW is 1544, you can subtract the BW configured for individual classes to get the BW of 541. Thanks!
- Manoj
05-17-2007 09:36 AM
Input and output queues are used in a router to temporarily hold packets if there is any congestion on the Lan/ Wan links. If the interface is busy sending out packets and a new packet arrives, the packet is kept in queue unless the interface sends out the previous packet. There are various QoS queuing tools available (CQ, PQ, FIFO, WFQ, CBWFQ, LLQ) which decide the manner in which packets need to be sent out the interface. The default queuing techique is Weighted Fair queueing (WFQ), hence the output shows "Queueing strategy: weighted fair".
Output queue: 0/1000/64/0 (size/max total/threshold/drops. The above line indicates there are no packets in the queue, the total size of the queue is 1000, each queue size is 64 and there are no drops so far. In regards to Available Bandwidth, I would say that your config would have QoS configured with BW allocated to different classes. Since the total BW is 1544, you can subtract the BW configured for individual classes to get the BW of 541. Thanks!
- Manoj
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