input queue increasing

From: El ayachi HADEK (elayachi.hadek@marocconnect.com)
Date: Tue May 10 2005 - 14:14:15 GMT-3


Hi,
In my router are terminated several tunnels ( GRE) and tunnels over tunnels.
The FastEthernet0/0 interface has stopped forwarding traffic (and ospf
became down). By looking to the show interface, I have noticed that the
input queue is 80/75/1501/0 (size/max/drops/flushes). To resolve this, I
have issued the interface command hold-queue 1000 in and now hold-queue
4096 in with is the maximum allowed.
Now, and without traffic in tunnel interfaces, the input queue is stucked in
1809.
Explanations!

FastEthernet0/0 is up, line protocol is up
  Hardware is AmdFE, address is 0030.9475.5e40 (bia 0030.9475.5e40)
  Internet address is 172.29.1.1/24
  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, 100BaseTX/FX
  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 01:52:16
  Input queue: 1809/4096/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 95000 bits/sec, 75 packets/sec
  5 minute output rate 88000 bits/sec, 70 packets/sec
     513705 packets input, 73581167 bytes
     Received 49046 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog
     0 input packets with dribble condition detected
     484988 packets output, 65962058 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 output buffer failures, 0 output buffers swapped out



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