Cisco WAN :: 1721 Router Suddenly Get Reboot With 1 Or 2 Hours Gap?
Jul 13, 2011
I have the Cisco series “Cisco 1700” routers operational at my client site, These router suddenly get reboot with 1 or 2 hrs gap. See the below errors which has been captured in router logs:
============================================================
00:00:09: %SYS-5-CONFIG_I: Configured from memory by console
00:00:11: %SYS-5-RESTART: System restarted --
Cisco Internetwork Operating System Software
IOS (tm) C1700 Software (C1700-Y-M), Version 12.2(16.1)T, MAINTENANCE INTERIM S
OFTWARE
TAC Support: [URL]
[code]....
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Nov 19, 2012
configuring VPN in my cisco 1721 router to connect in vpn client
I have the public IPs.
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Apr 24, 2012
I am going to configure ospf on cisco 1721 router but when I give command
conf t
router ospf 116
it does not show (config-router)
I am attaching sh run and sh version herewith attachment
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May 8, 2012
I have a 1721 router with 3 equal routes to 0.0.0.0, using CEF for load balancing with universal load balancing algorithm. It doesn`t NAT, just routing. I wonder which is the maximum capacity of the router, since it should support up to 40000 connections to different destination IP. Is the limit set by the router resources (CPU, memory, ...) or a maximum limit of entries in the table FIB / RIB?
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Mar 3, 2011
Trying to work out if I can setup a VLAN interface on a 1721 router.The only interfaces that are listed are the Ethernet (W1-ENET) and the Fast Ethernet interface.I'm still super new to all of this and learn how to change IOS via rommon and TFTP after realizing I had an IOS too large for the memory?
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Apr 20, 2011
Monday, I had a cisco 1750 router in place suddenly stop communicating to a Larscom ISP owned unit. Since then I have sent two replacement 1721 routers with WIC-1ENET cards. I have used the original straight thru cable to connect the 10baset port on the Larscom to my E0 on the WIC-1ENET. No link lights on either. I have also tried a known working straight thru cable and a crossover cable. No link lights.
I can take a crossover cable from a pc and ping the E0 port without issue. The ISP is telling me it is an issue with my equipment.
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Jan 10, 2012
I am in the process of configuring two vpn tunnels on one interface of cisco router series 1721. Any link or document with more information?
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Aug 22, 2011
I managed to setup a 1721 router as a vpn server connecting to it using a cisco vpn client however altough I am obtaining an ip address as defined in the dhcp pool I am unable to communicate with both the remote network and also I have no internet as soon as I connect.
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Mar 27, 2011
Is it possible to set up a vpn tunnel on a 1721 router that uses the following ios:
c1700-y7-mz.124-13b.bin
I thought I had read somewhere that tunnels were not supported on the 1700s but wanted to make sure. If they are I would like to know if they are supported in the above ios.
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Feb 25, 2011
I have cisco 1721 router so I installed an ethernet interface card so when I make show run I found that there is a fast ethernet 0 and ethernet 0 (which I installed) so i wand to make subinfaces of the etheernet 0 but I can't. I tried to make encapsulation dot.1q but it doesn't accept it.
Is Ethernet0 supported to generate subinterfaces?
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Oct 20, 2011
Long time since I have had to configure a router and have a small project
Here is what I have in a simple diagram:
PC(static IP)--to--Switch--to--(Ethernet0 int, WIC0)1721 router(FastEthernet0 int, built-in)--to--Switch--to--PC(DHCP)
I need static IP PC to be able to ping the DHCP client. Static IP units 10.1.1.x/16, DHCP clients 10.1.3.x/16.
I have found these overlap and thus give errors and will even shutdown the interface if I enable certain things like routing or bridging.
So I gather I need to change one interface IP range, which would be the DHCP side, I need to stay 10.1.1.x/16 for static side.
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Jan 26, 2012
enable dot1q encapsulation on two ethernet ports on a 1721 router. I am able to configure it on the built in fastethernet port, but not on any interface provided by a WIC-1ENET or a WIC-4ESW. I have an application that requires two physical ethernet ports that support dot1q encapsulation.
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Apr 7, 2011
i got a big problem, during a configuration reset i got an electrical blackout. I have set the configuration back after a password reset and send the reset prompt. At the restart of the router the blackout take all for 10 seconds out. When i restart the system an connect the router with the hyper terminal i get the following output:
[Code].....
I think the config was lost but how can i restart the router and enter a new one?
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Feb 22, 2012
I am working on a backup system for my WAN. Verizon quoted the HWIC-3G-CDMA-V to work with my Cisco 1721 router. I have a bunch on these routers on a shelf and thought I would use them for the 3G network. Looking at the Cisco web site it does not list the 1721 as being able to work with this HWIC. I thought it might not be listed as the 1700 series are End of life. Whether it will work?
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Jan 15, 2012
I would like to know can we configure vlans with cisco 1721 Modular Router? Is it Possible to configure lan environment with the vlans configured in 1721 router without a managed switch?
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Jul 11, 2012
My internet is T1 by Verizon. My mom's company Siemens pays for our internet because she works from home as medical tech support on the phone. Okay so the T1 had to be laid out to our house underground I think because where we live, other brands of internet aren't available. The T1 goes from the box outside into our basement and hooks up to a Cisco 1721 modem. From the 1721 the internet goes out to a wireless router that is sitting right next to it. This wireless router is a Linksys WRT160N V2. We have several cables coming out of the WRT160N V2 to go to the first floor for hardwired connections, but one cable goes to the attic and connects to a second wireless router. The second wireless router is a Linksys E2000. We have several cables coming out of the E2000 that go to the 2nd floor to serve as hardwired connections.Okay so let me explain where things went wrong.
After a storm our power went out. Eventually the power came back on, but every now and then our internet would shut off for like half a day then turn right back on, so our internet was getting really really spotty. The [b]AL[/b] light on the Cisco 1721 would come on every time the internet went out. It was so bad that my mom had to get an aircard from verizon to get internet. So after two weeks of spotty service and arguing with verizon trying to get them to come fix the problem, they said try resetting your wireless routers because they might have "bad data" in the lines causing spotty connection. So we reset the wireless routers by holding down the reset buttons on the back. Well.. this reset all of the settings for the routers which Cisco facilitated set up, and now our wireless routers are out of warranty date so they can't set the wireless routers back up. However, we have copies of the online wireless router set up page, so we thought maybe we could just set them up ourselves.Well the problem is... We don't know how to connect to the wireless setup pages.. I read something on the internet about setting up wireless networks and to type 192.168.1.1 into our browser(Mozilla Firefox) and that would bring us to the wireless setup page. But the page does NOT ever come up.
Another way to find the IP address of our wireless routers would be to try going to the cmd and typing in ipconfig and using the Default Gateway IP address for the browser to connect to the setup page but that doesn't work out either.... Right now I unhooked the Linksys WRT160N V2 and hardlined the Cisco 1721 to the Linksys E2000 to a PC on the second floor because I figured it wouldn't work out if we had two wireless routers running at the same time. Currently the browser is taking me no where at all. It just says "Connecting..." but nothing is loading up at all.I tried hardlining from the Cisco 1721 to my mom's laptop, which is her work computer, and I got no response at all. I figured it might just be her work computer that was messing up and not allowing her to hardline into the 1721 so I tried hardlining the Cisco 1721 straight to the PC desktop on the second floor(we have no other laptops other than my mom's work laptop) and nothing went through. Then my dad says the Cisco 1721 has been configured so it doesn't direct connect, meaning that it has to go through a wireless router.
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Feb 20, 2013
I am using a bunch of Cisco 1721 routers for my T1 lines. We recently purchased Digi cell modems as a backup for the T1. On configuring vrrp to work on both devices I discovered that IOS 12.3(6c) does not support the "vrrp track" feature. After reviewing the Cisco Feature Navigator I could not see an IOS that will support the vrrp object tracking. Is that correct? The routers have T1 WIC's installed. If it does work what is the latest IOS that will work on this end of life product?
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Oct 8, 2012
I bought this Tenda wifi router and connected it.It's a chinese one and the user interface is not much friendly. It works fine but sometimes if u play around with it u will lose the settings you inserted in to it and you will need to reconfigure it.
My problem is my ISP seems to renew the IP's issued to their customers automatically every 10 hrs from the last login. But every other router keeps the connection alive but my router doesn't. It needs to be restarted in order to get the internet back online.simply said,u need to restart the router every 10 hrs.
BTW Never buy Tenda routers.
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Feb 19, 2011
My D-Link DIR-655 will no longer let me pull up any web pages after several hours. For example, it works great when first rebooted, but the next morning web pages have timed out. When it is broken, I'm unable to connect to web pages via another wireless access point that i've plugged into the D-Link. I'm unable to use any of the wireless PCs or devices in my house.After it's rebooted, it works well for at least a few hours. It has the latest firmware and has basic, out of the box settings.
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Jun 4, 2011
I have a RVS4000 and a WRT54GL router at home... I am planning to power down my home completely for several hours, my question is will I have to re-setup everything or will it retain the settings within the router?
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Aug 22, 2011
I have a Dell Inspiron, Windows 7 laptop, that's about all I know about it. A couple months ago I got a Belkin Surf N300 router, when I first got it I had it set up through Hughes Net and everything worked fine, I had good connecting everywhere I went with my laptop. Now, I no longer have the Hughes Net and I hooked up through a Broadband thing, our desktop computer is connect to it and works perfectly fine, when I go to try and connect to it on my laptop it WILL NOT work, it just says its unable to connect to it. I have tried EVERYTHING I can think of and some stuff I didn't even know you could change, all I want is to use my laptop
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Sep 19, 2012
I have an issue with my current network where every couple of hours I will lose my connectivity and it will not come back unless I do a power cycle on my router/modem. I originally thought the issue was with my router, however I'm beginning to think it's an issue involving the modem. I've tried two different routers and this happens on both. My main router is a D-Link WBR-1310 (crap I know but it was free) and has lasted for years, and my modem is a Toshiba PCX2500 from Time Warner Cable. The second router I used to test this was an older Linksys BEFW11S4. I was going to replace my router, but when I saw that both of them reset after a few hours (today was only 5, last night it was connected for over 8 hours as I slept). I ran an IPCONFIG /ALL when I was connected with internet and when I was connected without and the only three changes were: [code]
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May 26, 2012
I have my D-link DIR 600 and I never had problems with it until now. For the past three weeks, my router keeps on disconnecting my Desktop P.C. from which the main internet cable is connected. Whenever it happens, I try connecting my Netbook over a WiFi connection using the same router; and even though my desktop can not connect to the internet, my netbook still can. Apparently when it happens, the [3] (the 4th light in the image) light goes off, and I have to restart my Desktop P.C. for it to turn on again and to use the internet again.
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Sep 13, 2011
I've needed to power-cycle my router every 2 hours. Usually it can last 2 weeks before needing to power-cycle (a process I've done for the past 2 or 3 years). This actually happened before for me a couple of months ago, but I did a firmware update along with a reset, and it looked like everything went back to normal.
But last Saturday I had to power-cycle it twice, then it didn't have any problems all day Sunday. But yesterday it went back to needing to be power-cycle it every 2 hours. My computer is physically connected to the router and is working perfectly no problems at all. But my parents use the wireless for their PC and laptop, and I use it for my 360, PS3, and Wii, so having to power-cycle it every 2 hours would be a pain.
I was wondering if this is a sign of the wireless in my router dying and in need of a new one, or is there some possible fixes I can do in order to repair it.
Mixed Mode
Wireless Channel 1
No WPA (Something I'm planning on fixing)
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Nov 4, 2012
I got my new comcast connection and using CISCO DPC3008 cable modem and EA6500 Wifi Smart Router. Internet works fine and then suddently the internet goes away. Further investigation shows EA6500 Wifi router just reboots every few hours and then wifi devices don't reconnect like it used to do with previous routers.
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Oct 21, 2011
I have a Cisco Linksys E1000 wireless router. It has been working perfectly for the last few months until yesterday when I noticed none of my wireless devices could connect. The SSID was still being broadcast and my computers that were connected through an ethernet cable were still able to access the internet fine. Eventually I pressed the red reset button on the back of the router, which reset my router name, password, etc. I set everything back up and was able to connect again. Several hours later the wireless stopped working again. When I launched the Cisco Connect software I was prompted to update some software (possibly the router firmware) so I did that. After that I was able to connect to wireless again. This morning I woke up and wireless was not working again. This time I changed the password for the router and then I was able to connect to wireless again. I tried to change the router password back to the original password and I couldn't connect anymore. When I changed the router password back to the new password I could connect again.
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Nov 29, 2012
I have an N750 DB router and it has been rebooting every few hours for no reason. This has just started happening about 4 days ago. I don't know why but when I check the system logs its filled with the following. [code]
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Aug 22, 2012
I'm probably overlooking something very simple but is there a command to show the uptime of a router interface in days,hours,minutes?
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Aug 6, 2012
The Port 80 port fowarding stops functioning after a few hours and requires the router to be rebooted to start forwarding again. The firmeware is the latest 1.0.04 Build 7. I require it to operate reliably for many days without intervention. I assume that it is a port forwarding problem because I can access the IP on my network from within my network even when I can't access it from outside my network. I am using the correct IP addresses as it sometimes works OK. A characteristic is that when I can't access the page it loads as completely blank white with no error message.
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Feb 9, 2010
I have noticed that in my router log that the router opes a port automatically without any human interaction and after some the time router closes the port again.Here is the log file of my router that opens the port and close it after a couple of hours.
LOG------------------------------
Tue, 2010-02-09 10:02:16 - AddPortMapping: external NULL:3658 to 10.1.1.253:3658 protocol UDP for: 10.1.1.253:3658 to 3658 (UDP) with timeout:0Tue, 2010-02-09 10:02:16 - no permission rule matched : accept by default (n_perms=0)Tue, 2010-02-09 10:02:16 - redirecting port 3658 to 10.1.1.253:3658 protocol UDP for: 10.1.1.253:3658 to 3658 (UDP)Tue, 2010-02-09 10:02:16 - creating pass rule to 10.1.1.253:3658 protocol UDP for: 10.1.1.253:3658 to 3658 (UDP)
.....
Tue, 2010-02-09 12:52:59 - DeletePortMapping: external port: 3658, protocol: UDPTue, 2010-02-09 12:52:59 - removing redirect rule port 3658 UDPTue, 2010-02-09 12:52:59 - Trying to delete rules at index 0
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Dec 4, 2012
I have a Linsys E3200 router for almost a year. It's been working fine until recently. It kept losing internet connection every a couple hours or even shorter. I have to power cycle the router in order to make it to work. However, sometimes that won't work either. I also tried to restore the router to the factory default but that doesn't seem to work.
I have updated the router with the latest firmware (1.04). I am using a cable connection and it never gives me any problem if I just connect my computer to it. I also test my network with another old netgear router that works just fine.
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May 10, 2011
i have a peak wireless router connected to my desk top or should i say modem, which was security enable with password and used to use my laptop a toshiba which used to automatically connect to my wirelless router i then rebooted router as couldnt remember password as my son wanted to connect with his laptop an xbox from his bedroom . since rebooting the router my son has conection with the xbox and his laptop but my laptop want find my nework
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Aug 23, 2012
I have a 1721 router in my home & I want to setup it for firewall/ vpn. Is it recommended to purchase a WIC-1ADSL? What module is recommended for VPN? Is it possible to setup VPN using DSL / Dynamic Ip connection ?I want to explore on Cisco security & I get this advice from a supplier.
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