connection down

I have a router that's at an external location. When I ping the router's outside IP i simply get a "request time out" error.When I ping the ip address of the ISP routers which my default gateway i get reply with TTL expired in transit. I understand that there might be a loop but since i get the ttl error on the isp modem, does that change things? I called the ISP and they're saying there is nothing going on their end.

Now, I had significant issues last night with this router, turned out to be a tunnel issue which is very add and hard to believe, but today the router went down almost at the same time, tunnel is down obviously. When I was troubleshooting the tunnel issuse, it looked like ACLS where limiting traffic through. Once i corrected the ACLS's everything seemed like it returned to normal. Now, i cannot ping the router, i get tsl errors on the isp modem. Any ideas?
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Shark AttackNetwork adminAsked:
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JohnBusiness Consultant (Owner)Commented:
I would get someone to cycle the router. Have them unplug the AC connection, wait 30 seconds, plug it back in, wait a minute and call you. Make sure they do not disconnect any Ethernet or phone lines.
Shark AttackNetwork adminAuthor Commented:
I have already done that. Nothing happened though unfortunately
Jeff RodgersNetworks & Communications Systems ManagerCommented:
Might be helpful to know the make/model of the router.   Huge benefit to knowing whether its a Cisco ASA or Fortigate or even a Dlink DSL router....

Just sayin.
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Shark AttackNetwork adminAuthor Commented:
the router is a 2811
JohnBusiness Consultant (Owner)Commented:
As noted, model information would be good. If there is a modem, router and switch (or switches), cycle it all and power up starting with modem, wait , router, wait , switches, and then test.
Shark AttackNetwork adminAuthor Commented:
i will have them power cycle everything at you said,. I will keep you posted.
Jeff RodgersNetworks & Communications Systems ManagerCommented:
Are you aware of any speed\duplex deviations between your ISP and Router?    

I had similar issues with one of my providers (their Cisco switch vs my Fortigate router). One of the ports between their switch and my router would lock up requiring manual intervention.   Hard coding the speed and duplex on both ends resolved it.
Shark AttackNetwork adminAuthor Commented:
i dont have physical access to the router and not sure what the settings on the Int are. I only have a show run config, nothing more specific though so can't tell. I send them a cable to we can get connected via serial. They're be on their hotspot so at least I'll be able to look at the interface status.
JohnBusiness Consultant (Owner)Commented:
Either that, or have them log in and tell you the settings.
Shark AttackNetwork adminAuthor Commented:
I asked them to swap the cable between the router and modem and it came back up.  Let's hope this was it. Hopefully this was it. I'll check the speed and duplex when I get in.
Shark AttackNetwork adminAuthor Commented:
now they're saying it never worked. not sure why they said it worked. its still down.
JohnBusiness Consultant (Owner)Commented:
Who owns the modem?  ISP?  Perhaps have it checked out and replaced.

Did the Cisco Router ever work?  Perhaps getting a newer one there is a cheaper road for you.
Shark AttackNetwork adminAuthor Commented:
well it came back up on its own. Here is the interface

Serial0/0/0 is up, line protocol is up
  Hardware is GT96K with integrated T1 CSU/DSU
  Internet address is 166.230.138.66/30
  MTU 1500 bytes, BW 1536 Kbit/sec, DLY 20000 usec,
     reliability 254/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, loopback not set
  Keepalive set (10 sec)
  Last input 00:00:00, 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: 2
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops)
     Conversations  0/2/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 1152 kilobits/sec
  5 minute input rate 4000 bits/sec, 4 packets/sec
  5 minute output rate 5000 bits/sec, 6 packets/sec
     977 packets input, 247521 bytes, 0 no buffer
     Received 30 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     26274 input errors, 3189 CRC, 3992 frame, 10167 overrun, 0 ignored, 8926 abort
     1429 packets output, 252122 bytes, 0 underruns
     0 output errors, 0 collisions, 5 interface resets
     9 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
     3 carrier transitions
     DCD=up  DSR=up  DTR=up  RTS=up  CTS=up
JohnBusiness Consultant (Owner)Commented:
The interface looks OK. For VPN, I use an MTU of 1492 or a bit less, but that only affects speed, not whether it is up or down.

I would consider getting the modem replaced. "It never worked, It is up, It is down, I can't reach it, they reset it"
Shark AttackNetwork adminAuthor Commented:
i cleared the interface counters. the below is new. the router keeps bouncing on and off. are you sure this looks normal? there was 20 interface resets in passed 10 min, 4350 CRC erorrs, 42517 input errors

Serial0/0/0 is up, line protocol is up
  Hardware is GT96K with integrated T1 CSU/DSU
  Internet address is 166.230.138.66/30
  MTU 1500 bytes, BW 1536 Kbit/sec, DLY 20000 usec,
     reliability 252/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, loopback not set
  Keepalive set (10 sec)
  Last input 00:00:08, output 00:00:00, output hang never
  Last clearing of "show interface" counters 00:16:55
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 8
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops)
     Conversations  0/2/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 1152 kilobits/sec
  5 minute input rate 5000 bits/sec, 5 packets/sec
  5 minute output rate 7000 bits/sec, 6 packets/sec
     1746 packets input, 373183 bytes, 0 no buffer
     Received 45 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     42517 input errors, 4350 CRC, 7716 frame, 12805 overrun, 0 ignored, 17646 abort
     2349 packets output, 431643 bytes, 0 underruns
     0 output errors, 0 collisions, 20 interface resets
     11 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
     4 carrier transitions
     DCD=up  DSR=up  DTR=up  RTS=up  CTS=up
Jeff RodgersNetworks & Communications Systems ManagerCommented:
I would say check your speed and duplex!   That kind of behavior is indicative of a mismatch.

Call your ISP and confirm your settings.
JohnBusiness Consultant (Owner)Commented:
I think the router action is not normal and why you should get it replaced.
Shark AttackNetwork adminAuthor Commented:
how can I view my speed and duplex settings on serial connection? i dont see anything under show int s0/0/0 show ip int s0/0/0
Jeff RodgersNetworks & Communications Systems ManagerCommented:
Not a cisco guy per se but I think the correct command is SH INT STATUS
Shark AttackNetwork adminAuthor Commented:
these are serial connection, its always on full duplex becosue they're point-to-point.
Shark AttackNetwork adminAuthor Commented:
i called the isp they seen some issues on their end

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Shark AttackNetwork adminAuthor Commented:
i called the isp they seen some issues on their end
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