switch routed ports not showing traffic flow

Mukarram Jah Raheel · ‎10-11-2010

following sw interface is not showing input/output flow of traffic.... any ideas....?

SW.ISBTHQ.ASW01#sh int gig 1/48
GigabitEthernet1/48 is up, line protocol is up (connected)
   Hardware is Gigabit Ethernet Port, address is 0022.55be.93ff (bia 0022.55be.93ff)
   Description: *** GE-UTP -to- IIB103-SW01 (3750) GE-1/0/21 ***
   Internet address is 10.16.101.226/30
   MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
      reliability 255/255, txload 1/255, rxload 1/255
   Encapsulation ARPA, loopback not set
   Keepalive set (10 sec)
   Full-duplex, 1000Mb/s, link type is auto, media type is 10/100/1000-TX
   input flow-control is off, output flow-control is off
   ARP type: ARPA, ARP Timeout 04:00:00
   Last input 00:00:00, output never, output hang never
   Last clearing of "show interface" counters 2w0d
   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
   Queueing strategy: fifo
   Output queue: 0/40 (size/max)
30 second input rate 0 bits/sec, 0 packets/sec
   30 second output rate 0 bits/sec, 0 packets/sec
   L3 in Switched: ucast: 905001834 pkt, 111623242295 bytes - mcast: 0 pkt, 0 bytes
   L3 out Switched: ucast: 1743853071 pkt, 2134521654058 bytes - mcast: 0 pkt, 0 bytes
      905194180 packets input, 131248097797 bytes, 0 no buffer
      Received 97466 broadcasts (0 IP multicasts)
      0 runts, 0 giants, 0 throttles
      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
      0 input packets with dribble condition detected
      1744345494 packets output, 2166340540041 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 output buffer failures, 0 output buffers swapped out

Calin C. · ‎10-12-2010

I know that this is a silly question, but do you have traffic over that interface? Are the other counters increasing (L3 in/out, packet input / output)?

Cheers,

Calin

Mukarram Jah Raheel · ‎10-12-2010

yes the interface is carrying traffic, i can see the traffic on the other node to which this interface is connected...

Timothy Stewart · ‎10-12-2010

Can you tell us which platform and which IOS you are running? Is this the only interface that is showing a input/output rate of 0, and if so is the interface/vlan configuration somehow different from the other interfaces? There have been a few software defects like this in the past, particularly on the cat4000 series.

Tim