Hi All,
I have been facing on one of my Router WAN MPLS Link Connected Interface, FE. In logs, I am getting below logs continuously and have done below troubleshooting.
- Router Model - Cisco 1841, IOS (C1841-ADVIPSERVICESK9-M), Version 12.4(19b).
- Interface Fa0/1 - connected to MPLS Link, Its going ISP. On this interface I am getting logs and its Interface is configured Speed/Duplex Auto but its auto-negotiating to Half/100Mbps. At the other end (ISP), its confirmed that they have configured Full/100Mbps.
- We tried changing the settings but each time we lost the connectivity to the router after that change and had to revert to auto settings.
- Checked cable type. It was Straight-Through and changed the same to Cross-Over.
- Cable is of good quality and its Cat 6A. Length 3m only.
- Device CPU utilization is being fine.
Please let me know:
- What could be the possible reason for this and how can I resolve it?
- What would be the impact on router and the traffic flow? So far I haven't received any issues and ping response for this link seems normal (as what is expected).
Apr 3 14:42:38 CEST: %GT96K_FE-5-LATECOLL: Late Collision on int FastEthernet0/1
Apr 3 14:42:40 CEST: %LINK-3-UPDOWN: Interface FastEthernet0/1, changed state to up
Apr 3 14:42:46 CEST: %GT96K_FE-5-LATECOLL: Late Collision on int FastEthernet0/1
Apr 3 14:42:46 CEST: %GT96K_FE-5-LATECOLL: Late Collision on int FastEthernet0/1
Apr 3 14:42:48 CEST: %LINK-3-UPDOWN: Interface FastEthernet0/1, changed state to up
Apr 3 14:43:11 CEST: %GT96K_FE-5-LATECOLL: Late Collision on int FastEthernet0/1
Apr 3 14:43:13 CEST: %LINK-3-UPDOWN: Interface FastEthernet0/1, changed state to up
Apr 3 14:43:42 CEST: %GT96K_FE-5-LATECOLL: Late Collision on int FastEthernet0/1
Apr 3 14:43:44 CEST: %LINK-3-UPDOWN: Interface FastEthernet0/1, changed state to up
RTR01#sh int f0/1
FastEthernet0/1 is up, line protocol is up
Hardware is Gt96k FE, address is 001c.5846.e8a5 (bia 001c.5846.e8a5)
Description: **MPLS link connected to AUROHYD_RTR 192.168.83.2**
Internet address is 192.168.83.42/30
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)
Half-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: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 8000 bits/sec, 5 packets/sec
5 minute output rate 9000 bits/sec, 4 packets/sec
12648229 packets input, 2616311911 bytes
Received 2 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
10879116 packets output, 1842349659 bytes, 0 underruns
5308 output errors, 19560 collisions, 5296 interface resets
0 unknown protocol drops
0 babbles, 5333 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
RTR01#sh run int f0/1
Building configuration...
Current configuration : 165 bytes
!
interface FastEthernet0/1
description **MPLS link connected to ISP**
ip address 192.168.83.42 255.255.255.252
duplex auto
speed auto
end
Can anybody help me out and share your details thoughts on this, please. Thanks!
Regards,
Yaseen
