08-17-2013 10:29 AM - edited 03-07-2019 02:59 PM
Please help and advise. I am unable to connect any device on both my fa0/0 and fa0/1. Is it a hardware failure?
FastEthernet0/0 is up, line protocol is up
Hardware is AmdFE, address is 0013.7f8e.3660 (bia 0013.7f8e.3660)
Internet address is 192.168.1.1/24
MTU 1500 bytes, BW 100000 Kbit/sec, 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 00:00:02, output 00:00:02, output hang never
Last clearing of "show interface" counters 00:44:24
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 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
2112 packets input, 429469 bytes
Received 2112 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
315 packets output, 32310 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
2105 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
08-17-2013 11:21 AM
08-17-2013 11:45 AM
My packets are entirely dropped including ICMP Echo and ARP not just DTP, CDP packets.
6142 packets input, 1255543 bytes
Received 6142 broadcasts, 0 runts, 0 giants, 0 throttles
6124 unknown protocol drops
I directly connected a laptop to the port and ping but the pings were dropped as well.
08-17-2013 02:20 PM
Can you post "sh run" from the router?
08-17-2013 07:18 PM
Thanks Reza. For your reference
Current configuration : 1216 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname
!
boot-start-marker
boot-end-marker
!
enable secret 5
enable password
!
no aaa new-model
memory-size iomem 30
clock save interval 8
no network-clock-participate slot 1
no network-clock-participate wic 0
ip cef
!
!
!
!
no ip domain lookup
!
multilink bundle-name authenticated
!
!
!
!
!
archive
log config
hidekeys
!
!
!
!
!
!
!
interface FastEthernet0/0
ip address 10.0.1.3 255.255.255.0
duplex auto
speed auto
no mop enabled
!
interface Serial0/0
no ip address
shutdown
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/1
no ip address
shutdown
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
!
!
line con 0
exec-timeout 0 0
password
logging synchronous
login
speed 115200
line aux 0
line vty 0 4
exec-timeout 0 0
password
logging synchronous
login
line vty 5 15
exec-timeout 0 0
password
logging synchronous
login
!
!
end
08-17-2013 07:27 PM
On your first post you have:
Internet address is 192.168.1.1/24
On your last post you have:
interface FastEthernet0/0
ip address 10.0.1.3 255.255.255.0
are these both from the same router?
If yes, try this command
interface FastEthernet0/0
mop enabled
and test again
HTH
08-21-2013 05:31 PM
Thanks but I found an anomaly that suggests its a main board issues.
I debug arp and saw the ping address alway show incomplete. I used wireshark to capture the ping packet and found 2 of the bits always set as 1.
For broadcast to 0000.0000.0000, the packet destination is 0002.0000.0002. I tried to key in static arp entry and observed the following:
For mac target 4F6D became 4F6F but 4F6B is correctly transmitted. I think the 2nd least significant bit of the 4th hex value is always 1.
Likewise if mac end with A, its transmitted correctly but 0 changes to 2 and 9 become B. Hence, the 2nd bit in the last hex is again always 1.
Unfortunately I think my router is defective. Repair is probably not worth it.
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