Seek general advice - how to keep internet conn. active (800 series)

[jimwillsher]

Hi all,

I'm looking for some GENERAL advice for the 800 series router - I have the 877, running 12.4(24)T1.

This morning I had no internet access. There was nothing obviously wrong with the router (though I'm a newbie). I logged in and issued a reload and everything has been fine since. What I'm looking for is some general advice, particularly:

- If this happens again, what commands should I run on the router to check the status. I looked at show int and they all looked fine.

- Is there a simple command I can run to drop the connection and re-establish it, since reload seems a bit of a sledgehammer.

- More importantly, is there anything I can configure on the router so that it will try to maintain the internet connection, and re-establish it if it seems to have gone.


Looking at mrtg, my connection has been down since about 00:33 (it's now 07:51), and it just required a reload to get it going. That would be a nuisance if I was away for a few days....

Sep 22 00:33:38 192.168.1.1 74: .Sep 22 00:33:17.230: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access3, changed state to down
Sep 22 07:29:20 192.168.1.1 75: .Sep 22 07:28:59.765: %SEC_LOGIN-5-LOGIN_SUCCESS: Login Success [user: root] [Source: 192.168.1.242] [localport: 22] at 07:28:59 GMT Tue Sep 22 2009
Sep 22 07:34:28 192.168.1.1 76: .Sep 22 07:34:07.746: %SEC_LOGIN-5-LOGIN_SUCCESS: Login Success [user: root] [Source: 192.168.1.242] [localport: 22] at 07:34:07 GMT Tue Sep 22 2009
Sep 22 07:38:36 192.168.1.1 77: .Sep 22 07:38:11.221: %SYS-5-RELOAD: Reload requested by root on vty2 (192.168.1.242). Reload Reason: Reload Command.


Many thanks,


Jim

 

[North323]

it may not be the router, it may be the ISP, post show interface s0/0/0 (or whatever is ISP facing). are there errors?, resets?

 

[jimwillsher]

Hi, and many thanks for replying.

If there were errors, I've probably lost the log by rebooting it.

This is from show int ATM0

Cisco877#sh int ATM0
ATM0 is up, line protocol is up
Hardware is MPC ATMSAR (with Alcatel ADSL Module)
Description: ADSL Connection
MTU 4470 bytes, sub MTU 4470, BW 832 Kbit/sec, DLY 440 usec,
reliability 255/255, txload 1/255, rxload 2/255
Encapsulation ATM, loopback not set
Encapsulation(s): AAL5 AAL2, PVC mode
10 maximum active VCs, 1024 VCs per VP, 1 current VCCs
VC Auto Creation Disabled.
VC idle disconnect time: 300 seconds
Last input never, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/200/0/0 (size/max/drops/flushes); Total output drops: 7
Queueing strategy: Per VC Queueing
5 minute input rate 7000 bits/sec, 5 packets/sec
5 minute output rate 5000 bits/sec, 6 packets/sec
1522891 packets input, 2078399326 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
888801 packets output, 75323649 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out



and this is from Dialer0

Dialer0 is up, line protocol is up (spoofing)
Hardware is Unknown
Internet address is 78.32.xxx.xxx/32
MTU 1500 bytes, BW 56 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 4/255, rxload 13/255
Encapsulation PPP, loopback not set
Keepalive set (10 sec)
DTR is pulsed for 1 seconds on reset
Interface is bound to Vi3
Last input never, output never, output hang never
Last clearing of "show interface" counters 05:03:42
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/0/16 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 42 kilobits/sec
5 minute input rate 3000 bits/sec, 1 packets/sec
5 minute output rate 1000 bits/sec, 1 packets/sec
1519325 packets input, 2078345181 bytes
888856 packets output, 71772936 bytes
Bound to:
Virtual-Access3 is up, line protocol is up
Hardware is Virtual Access interface
MTU 1500 bytes, BW 832 Kbit/sec, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Open
Open: IPCP
PPPoATM vaccess, cloned from Dialer0
Vaccess status 0x44
Bound to ATM0 VCD: 1, VPI: 0, VCI: 38, loopback not set
Keepalive set (10 sec)
DTR is pulsed for 5 seconds on reset
Interface is bound to Di0 (Encapsulation PPP)
Last input 00:00:02, output never, output hang never
Last clearing of "show interface" counters 05:03:40
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 1000 bits/sec, 2 packets/sec
5 minute output rate 1000 bits/sec, 2 packets/sec
1522943 packets input, 2078403338 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
888873 packets output, 71773364 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions

 

[North323]

is your ISP provide a static IP address or DHCP?

 

[jimwillsher]

I get a static from the ISP, but I let the router sue what it gets (always the same one).


Jim

 

[North323]

i would try to statically assign the IP address to the interface

 

[jimwillsher]

Ok I'll try that. Many thanks.