11-22-2011 07:05 AM - edited 03-04-2019 02:22 PM
I am a newbe to troubleshooting performance issues on my Cisco 2611XM. I did know enough to show the interface and I see errors. (See below)
Do I need to be concerned about input errors? Those seem to be plentiful on both interfaces. FA0/0 has 498 lost carriers? Could someone point me in the direction where to go from here? Your help is greatly appreciated. (TheGeekGirl yep I'm a girl )
Gateway#show interfaces
FastEthernet0/0 is up, line protocol is up
Hardware is AmdFE, address is xxxxxxxx
Description: $FW_OUTSIDE$
Internet address is xxxxxxxxxx
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 7/255
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 never
Input queue: 0/75/963/0 (size/max/drops/flushes); Total output drops: 101
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 2788000 bits/sec, 272 packets/sec
5 minute output rate 169000 bits/sec, 186 packets/sec
1367033775 packets input, 4193748884 bytes
Received 22756 broadcasts, 0 runts, 0 giants, 0 throttles
1708292 input errors, 1708292 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
1096046292 packets output, 482805405 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 babbles, 0 late collision, 0 deferred
498 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
FastEthernet0/1 is up, line protocol is up
Hardware is AmdFE, address is xxxxxxxxxxxxxxxxxx
Description: $FW_INSIDE$
Internet address is xxxxxxxxxxxxxxxxxxxxxx
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 7/255, 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 never
Input queue: 3/75/6797/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 179000 bits/sec, 198 packets/sec
5 minute output rate 2787000 bits/sec, 272 packets/sec
1164757213 packets input, 2673658922 bytes
Received 68017270 broadcasts, 0 runts, 0 giants, 0 throttles
1984511 input errors, 1984511 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
1363739305 packets output, 2900686239 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
11-22-2011 07:51 AM
You "may " have a problem.
1. On the router, do a clear counters. we need to establish a time line and see what happens over the next 12/24 hours.
2. Double check the settings on the firewall attached to both interfaces, make sure speed and duplex match. You can do this without messing up the results of item #1.
3. The CRC errors on FE 0/0 are generally the result of a hardware failure. I would at a minimum plan on swapping the
cable out. if possible, finish test #1 first. if you do swap the cable, then restart test 1 from that point.
4. Its also possible that there are issues with either the firewall ethernet interface or the router.
11-27-2011 06:13 PM
Hello!
1. I cleared the counters. The output below is for 10 hours.
2. I have checked my cables. They are all good.
4. Speed and duplex match.
5. There is no firewall involved.
6. I still have a lot of CRC errors.
7. This is a router.
Any thought about where I should do next?
TheGeekGirl
Gateway#show int
FastEthernet0/0 is up, line protocol is up
Hardware is AmdFE, address is xxxxxxxxx
Description: $FW_OUTSIDE$
Internet address is 206.128.127.227/29
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 10/255
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 04:51:07
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 4168000 bits/sec, 439 packets/sec
5 minute output rate 328000 bits/sec, 315 packets/sec
5881430 packets input, 3083817288 bytes
Received 82 broadcasts, 0 runts, 0 giants, 0 throttles
6985 input errors, 6985 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
4109561 packets output, 617740710 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
FastEthernet0/1 is up, line protocol is up
Hardware is AmdFE, address is xxxxxxx
Description: $FW_INSIDE$
Internet address is 10.5.1.1/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 10/255, 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 04:51:09
Input queue: 0/75/3/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 342000 bits/sec, 328 packets/sec
5 minute output rate 4166000 bits/sec, 438 packets/sec
4339089 packets input, 642690872 bytes
Received 225819 broadcasts, 0 runts, 0 giants, 0 throttles
7943 input errors, 7943 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
5883239 packets output, 3081143625 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
Gateway#
11-27-2011 06:16 PM
Wow. Look at your CRC errors GO!
What's connected to the router? Can you enable auto-negotiation of the speed and duplex?
11-27-2011 06:49 PM
Hi,
So, this router is connected to 2 firewalls (inside and outside)? If yes, what is the speed and duplex on the firewall side of the connections?
What type of firewall?
HTH
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