Problem between two routers

[m4rc00]

Hi

i have two routers : C1841 and C2901

On C1841 i have Incomplete Arp Request :

xxxx#sh arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 10.96.98.9 0 Incomplete ARPA
Internet 10.96.98.10 - xxxxxxxxxxxxxx ARPA FastEthernet0/0
Internet 10.96.10.250 0 Incomplete ARPA

Cannot ping 10.96.98.9 which is interface on C2901.
I have changed twice cabling and nothing.
Noticed that on both interfaces traffic is going out, but not in.
:

ISR-C2901-01#sh int f 0/2/0
FastEthernet0/2/0 is up, line protocol is up
Internet address is 10.96.98.9/29
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 05:44:09, output 00:00:01, output hang never
Last clearing of "show interface" counters 03:21:07
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 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes
Received 4200 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 5378 ignored
0 watchdog
0 input packets with dribble condition detected
8409 packets output, 615971 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
7 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out


and:

heic_1524_hk_mpls>show interf FastEthernet0/0
FastEthernet0/0 is up, line protocol is up
Internet address is 10.96.98.10/29
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 never, 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 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes
Received 0 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
1518 packets output, 91182 bytes, 0 underruns
0 output errors, 0 collisions, 4 interface resets
0 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
no input packets at all

Do you have any idea what can be an issue ? it was working ok before tonight

 

[unclerico]

how are these physically cabled?? are they connected via x-over or do you have a switch between them??

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