I have a Cisco 827 router that has worked great for us for the past two years. It has always brought in the 1.5 Mbps DSL into our corporate LAN without a hitch. Three weeks ago things changed. I tend to think the router is still great and that it is our ISP (TDS Telecom) that has gone to hell, but I'm posting here to get your feedback.
Three weeks ago, November 23 to be exact, we started losing our Internet connection at 5 PM, plus or minus a minute. Our Internet is gone and it stays gone until about 5 AM. Between 5 AM and 5 PM everything is great, strong, and solid. Every week day the same thing happens. As far as I have been able to tell Saturdays are out of service, but then Sundays are usually on.
When we lose our Internet the OK, CD, and 1 lights are on solid. No other flickering or solid lights are to be seen. It looks like we should have service, but we don't. We can ping the router at anytime from the LAN, before or after 5 PM.
The common thought from our ISP (who refuses to step on site) and independent CCNA/MCSE (who came on site and spent about two hours after 5 PM troubleshooting to only scratch his head) is that there must be a point of interference that is kicking on at 5 PM and shutting off at 5 AM. We run two shifts here, but the shift change is at 3:30 PM, and we have changed nothing around here in months with equipment, electrical work, or the sort. We've spoken with our nearby neighbors to see if they brought on any new equipment or processes three weeks ago and that has come up empty.
I am not a CCNA, nor an MCSE, but I do have an engineering degree and seven years of IT experience. This whole situation is getting a lot of people hot and I'm looking for any possible answers or things to try. Thanks for your feedback.
Has someone configured the router ignore outgoing traffic for a 12 hour period and forgot to let everyone know! Can you post the running configuration here? Use "Router#sh run" command and cut and paste the info here and I'll take a look at it, your CCNA friend should know what to look for (Replace your ip addresses and passwords with x's)
To update the situation, we now have Internet access 24 hours per day again. Last Friday a TDS technician came out, found nothing, and yet that evening our Internet remained on after 5. TDS has not acknowledged that they fixed the problem. In fact, they think we still have the problem. Until we get a proven record of success going I'm not going to tell them any different. Take a look at our config below. Tell me if you see anything out of the ordinary. One thing I would like to change is that as things are currently set up, we can not ping or run traceroutes on external addresses. What do I need to change to enable this? Why would our CCNA default to not enabling this? Thanks for your time.
Current configuration : 1914 bytes
no service pad
service timestamps debug uptime
service timestamps log uptime
no service dhcp
enable secret 5 ZZZZZ
enable password 7 ZZZZZ
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
ip name-server X.X.X.X
ip name-server X.X.X.X
no ip dhcp conflict logging
ip address X.X.X.X X.X.X.X
ip nat inside
hold-queue 100 out
no ip address
no atm ilmi-keepalive
encapsulation aal5mux ppp dialer
dialer pool-member 1
dsl operating-mode auto
hold-queue 208 in
description ip address from TDS X.X.X.X
ip address negotiated
ip access-group 101 in
ip nat outside
dialer pool 1
ppp pap sent-username password 7 ZZZZZ
ip nat inside source list 1 interface Dialer0 overload
I spent 4 1/2 years in a DSL NOC. Youre problem is not the router, the config or anything. Its your DSL line. Signal interference with DSL lines is common and very well known. TDS is your ISP, but it looks like Covad is your DSL providor. You need to verify this with TDS, and if you still have line problems you need a Covad line tech dispatched to your site with a TDR for intrusive testing after 5pm.
My guess would be that somethign in your area was installed on Nov 22 or 23rd. They may want to invesitgate that also.
Going with your line of thinking, does it make sense that a neighboring company in another building less than 100 yards away with the same DSL service and the same Cisco router has had no service interuptions this past month? Forgive the newbie questions, but what is your indicator that Covad is our DSL providor? What is a NOC? What is a TDL?
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