03-26-2012 01:47 AM - edited 03-07-2019 05:46 AM
Hello everybody.
we're facing a weird issue lately with a Cisco 2821.
An interface stops responding after a few hours.
The only way to bring it 'up' again is:
Hardcode: duplex or speed
or
shutdown -> no shutdown
there are no errors in the "sho interface" and no errors or entries in the log.
FastEthernet0/0/0 is up, line protocol is up
Hardware is Fast Ethernet, -
Description: Infopoint
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
ARP type: ARPA, ARP Timeout 04:00:00
Last input 22:20:19, output never, output hang never
Last clearing of "show interface" counters 3d23h
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
158377 packets input, 13566230 bytes, 0 no buffer
Received 20036 broadcasts (3176 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
310913 packets output, 72379459 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
2 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
Any idea why this is happening?
05-02-2012 06:02 AM
Hi Leo, unfortunately yes, I'm still getting the same issues. Matter of fact, the internet just went down because of this problem with the router. I just had to restart it some 10 minutes ago to restore the service.
05-02-2012 03:11 PM
Hmmmm ... You wouldn't happen to have a 2960, 3560G or a 3750G nearby would you?
05-03-2012 01:56 AM
lol, Nope. Unfortunately the 2821 happens to be the only better router available now. I did already suggest to my company to buy one of the routers u suggested but they said, I'm a network adminstrators and I have to come up with a way to solve the problem of this router, that's why I've been looking for alternative ways to avoid having to restart the router every 4, 5 or 8 hours. The surprising thing though, is that for the first time the router has been up for 11h now. Ok maybe some few more details will help understand better my situation:
We have the same 2821 router with 2 gigabit ethernet interfaces and 1 HSSI interface. The 2 LAN interfaces connect to LANS in our office and the HSSI connect to a comtech modem and to the internet via satelite. This router has been up for the past 5 months with no problem. Now, The router giving me tough time (located in another department) is another same 2821 but with only 2 gigabit ethernet interfaces. The gigabit ethernet 0/0 connects to our LAN and the 0/1 connects to an optical fiber converter (OP-108) in our office, and to a remote OP-108 on our ISP side , then to a router then to internet via optical fiber. And so my problem is that this later router works for few hours and then suddenly its interfaces stop responding. U can can easly setup a console session with the router but the interfaces would not respond until u restart the router to restore the service.
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