[c-nsp] C3750G Interface Counters

[Bill Blackford]

Hello all,

I am observing a strange issue where I have an interface that is showing zero packets/sec. The packets input and packets output are incrementing. My SNMP collector is graphing. This is one of two interconnect ports to a customer peering up with two BGP sessions using multipath. The other port's packets/sec counters are behaving as expected.

WS-C3750G-24TS-E1U
12.2(50)SE3


My_3750#sh int gi1/0/21
GigabitEthernet1/0/21 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 0015.2bxx.xxxx (bia 0015.2bxx.xxxx)
  Description: CustA Port1
  Internet address is x.x.x.x/30
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 0/255
  Encapsulation ARPA, loopback not set
  Keepalive not set
  Full-duplex, 100Mb/s, media type is 10/100/1000BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:19, output 00:00:00, output hang never
  Last clearing of "show interface" counters 00:14:20
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 4073
  Queueing strategy: fifo
  Output queue: 0/0 (size/max)
  30 second input rate 0 bits/sec, 0 packets/sec
  30 second output rate 0 bits/sec, 0 packets/sec
     743069 packets input, 209425595 bytes, 0 no buffer
     Received 0 broadcasts (0 IP 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
     911587 packets output, 955053286 bytes, 0 underruns
     0 output errors, 0 collisions, 0 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
My_3750#sh int gi1/0/22
GigabitEthernet1/0/22 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 0015.2bxx.xxxx (bia 0015.2bxx.xxxx)
  Description: CustA Port2
  Internet address is x.x.x.x/30
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 31/255, rxload 2/255
  Encapsulation ARPA, loopback not set
  Keepalive not set
  Full-duplex, 100Mb/s, media type is 10/100/1000BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:02, output 00:00:25, output hang never
  Last clearing of "show interface" counters 00:14:22
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 5710
  Queueing strategy: fifo
  Output queue: 0/0 (size/max)
  30 second input rate 937000 bits/sec, 864 packets/sec
  30 second output rate 12324000 bits/sec, 1292 packets/sec
     578583 packets input, 145713935 bytes, 0 no buffer
     Received 91 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 91 multicast, 0 pause input
     0 input packets with dribble condition detected
     919361 packets output, 991069241 bytes, 0 underruns
     0 output errors, 0 collisions, 0 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


Thank you,

-b

--
Bill Blackford                     
Senior Network Engineer            
Technology Systems Group           
Northwest Regional ESD             

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