10-13-2006 09:33 AM - edited 03-05-2019 12:14 PM
We have a router outside a firewall that seems to be the source of connectivity issues. FA0/0 connects to a firewall that is under our control, FA0/1 connects to a network that is outside our control. The errors are on FA0/0. SSH sessions to this router are slow, as are ssh sessions to servers behind this router. Some NTP traffic going through the router seems to be dropping.
Here is the show int:
sh int fa0/0
FastEthernet0/0 is up, line protocol is up
Hardware is AmdFE, address is 0010.7b84.2fc0 (bia 0010.7b84.2fc0)
Internet address is 172.17.246.10/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 2/255
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 00:58:47
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 971000 bits/sec, 189 packets/sec
5 minute output rate 138000 bits/sec, 149 packets/sec
696420 packets input, 467071241 bytes
Received 1 broadcasts, 0 runts, 0 giants, 0 throttles
341 input errors, 0 CRC, 0 frame, 341 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
550225 packets output, 110026505 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
This is on a 3640 running 12.4(8).
What could be at the source of the problems?
10-14-2006 03:09 PM
Lot of input errors are seen. Reason could be bad cabling, Duplex mismatch or bad NICS
Try changing the cable connecting to your firewall.
Narayan
10-14-2006 07:16 PM
Hi,
This interface has had 341 'Input errors'. An input error includes runts,
giants, no buffer, CRC, frame, overrun, and ignored counts. Other input-related
errors can also cause the input error count to be increased. Some datagrams can
have more than one error. Therefore, this sum may not be equal to the sum of
enumerated input error counts.
341 'overruns' have been reported, 0.04894% of the total input traffic.
This is because, the input rate exceeds the ability of the receiver to handle
data.
So as said below you can try by changing cable or duplex settings....
Rate if it does,
Rgs
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