Cisco2951 input hangs. I can SSH to outside and reload.

[chris@routerguy.com]

So, I have this CISCO2951/K9.  On the "inside" interface, it locks up and will not accept traffic.  I can try to clear the interface, shutdown and no shutdown, I can reset and try anything.

The worst thing of this situation is, you never know when this failure will happen randomly.  When you are least expecting it.  I can go for days, weeks or even a couple months with no failures.  Then BOOM!

CPU load is OK.  But no traffic will pass from Gig 0/1 (inside) to the rest of the world or the inner workings of the router.

I can connect to the outside (gig 0/0) interface and issue any command I wish.  The CPU load is fine.  The interface is showing no traffic at all and is showing up.  I tried researching wedged interface soltutions.

This unit is running Version 15.7(3)M4

Any hints or suggestions are welcome.

[chris@routerguy.com]

Hello there! Thanks for the hint. I really wish it was as simple as an IP address conflict. I am confident that is not an address conflict, or the LOG file would have shown it. This is almost like a wedged interface with an overflow on the input queue. You cannot ping it from the LAN, however, you can ping the IP address on that interface from a session within the router.
Thanks again!
Chris.

[chris@routerguy.com]

OK Gang, It happened again… But this time, I connected from the outside using a VPN to the unit. This “show interface” is on the “inside” LAN interface (gig 0/1)

MRW-2951#sh int gig 0/1
GigabitEthernet0/1 is up, line protocol is up
Hardware is PQ3_TSEC, address is e4d3.f1a7.cb51 (bia e4d3.f1a7.cb51)
.
.
.
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:38, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 76/75/10144/0 (size/max/drops/flushes); Total output drops: 0 • Size=76, max=75 ???
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 157000 bits/sec, 15 packets/sec
10640279 packets input, 6816819519 bytes, 0 no buffer
Received 334774 broadcasts (166513 IP multicasts)
0 runts, 0 giants, 7630 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 249230 multicast, 0 pause input

So, the interface is getting wedged. Is this a hardware failure or is this a software bug?