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Input & Output bytes question

Hello,

This is a simple question that I can't figure out

I have a router with 3 serial interface and 1 ethernet interface, we have been experiencing low speeds on our wan links so I'm trying to figure out where most of the traffic is coming from. When I do show interface it gives me the counters for each interface which has INPUT and OUTPUT statistics, and I can't figure out which is what.

For example

Corp LAN Router E0/0 Router S0/0 Branch LAN Ethernet Input Ethernet Output Serial Input Serial Output

Is this correct if I'm looking at statistics on our main router? or is it the other way, I'm just trying to figure out which way the traffic is flowing, because on one of the interfaces there was over 2 gigs of data transferred and I know thats that way too much data for the application that they use.

Here's the show interface statistics (I cleared the counters so its only for 9 minutes) Serial0/0 is up, line protocol is up Hardware is PowerQUICC Serial Internet address is 192.168.1.1/30 MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, reliability 255/255, txload 2/255, rxload 1/255 Encapsulation PPP, loopback not set Keepalive set (10 sec) LCP Open Open: IPCP, CDPCP Last input 00:00:10, output 00:00:06, output hang never Last clearing of "show interface" counters 00:09:08 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 0/3/256 (active/max active/max total) Reserved Conversations 0/0 (allocated/max allocated) Available Bandwidth 1158 kilobits/sec 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 2118 packets input, 271228 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 4483 packets output, 1761628 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

Ethernet0/1 is up, line protocol is up Hardware is AmdP2, address is 0005.3281.da21 (bia 0005.3281.da21) Internet address is 10.3.0.1/16 MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 10/255 Encapsulation ARPA, loopback not set Keepalive not set 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 00:09:10 Queueing strategy: fifo Output queue 0/40, 0 drops; input queue 0/75, 0 drops 5 minute input rate 408000 bits/sec, 105 packets/sec 5 minute output rate 41000 bits/sec, 41 packets/sec 69231 packets input, 30555545 bytes, 0 no buffer Received 691 broadcasts, 0 runts, 0 giants, 0 throttles 107 input errors, 107 CRC, 0 frame, 0 overrun, 0 ignored 0 input packets with dribble condition detected 27680 packets output, 3616342 bytes, 0 underruns(0/0/0) 0 output errors, 0 collisions, 0 interface resets 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out Serial0/1 is up, line protocol is up Hardware is PowerQUICC Serial Internet address is 192.168.1.5/30 MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, reliability 255/255, txload 26/255, rxload 1/255 Encapsulation PPP, loopback not set Keepalive set (10 sec) LCP Open Open: IPCP, CDPCP Last input 00:00:03, output 00:00:00, output hang never Last clearing of "show interface" counters 00:09:11 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 0/27/256 (active/max active/max total) Reserved Conversations 0/0 (allocated/max allocated) Available Bandwidth 1158 kilobits/sec 5 minute input rate 11000 bits/sec, 13 packets/sec 5 minute output rate 163000 bits/sec, 39 packets/sec 15226 packets input, 1858382 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 38049 packets output, 16517918 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

Serial0/2 is up, line protocol is up Hardware is PQUICC with Fractional T1 CSU/DSU Internet address is 192.168.1.9/30 MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec, reliability 255/255, txload 27/255, rxload 2/255 Encapsulation PPP, loopback not set Keepalive set (10 sec) LCP Open Open: IPCP, CDPCP Last input 00:00:09, output 00:00:02, output hang never Last clearing of "show interface" counters 00:09:12 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 0/3/256 (active/max active/max total) Reserved Conversations 0/0 (allocated/max allocated) Available Bandwidth 1152 kilobits/sec 5 minute input rate 17000 bits/sec, 20 packets/sec 5 minute output rate 165000 bits/sec, 44 packets/sec 10077 packets input, 1129499 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 25836 packets output, 11544123 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
Reply to
Igor Pinchevskiy
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I don't really understand your diagram above, but input and output are relative to the router, not the network. Think of the router as a train or bus station -- input is passengers arriving, output is passengers leaving.

Reply to
Barry Margolin

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