Cisco Infrastructure :: 3825 Gi0/0 Interface Does Not Work With Modem
Mar 7, 2012
We have a Cisco 3825 router which does not work well with a DSL modem(ISP provided). I have configured the Gi0/0 port of the router to plug into this DSL modem but it does not ping to the ISP gateway. If we do a shut/no shut on the interface then it work fine for about 30 secs. Sometimes even for 1 hr. Then the packets drop and we cannot pass any traffic through this interface.Now, if the ISP connection is terminated on a computer it works fine. It works fine without dropping any packet. I have tried various options like using a straight/cross cable. I have tried to configure the interface negotiation for 100/full, 100/half, auto/auto and almost all the options. I have also tried to interconnect the devices using a L2 device like a HUB. Nothing works.
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May 15, 2011
I try to change modem speed from 1200 to 19200 on aux 0 interface.But I can't save the settings using "write memory" In show running-config, I can see modem speed successfully changed.
Cisco3825's OS information is here. c3825-spservicesk9-mz.124-25b.bin
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Oct 30, 2011
We were unable to login to a 3825 with a known good password, so we used Cisco's Password Recovery Procedure for that device. We were successful in resetting the password, and had access to the CLI. However, when we logged out of the router, then attempted to log back in, the 'Invalid Password' prompt again came up.We have to use password recovery each and every time we need to access the CLI. Might this be an NVRAM problem?
Show version for this device is: C3825-advsecurityk9-m 12.4(3a).
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Aug 4, 2012
I put a second HWIC-4ES in a 3825 router and it does not work, only work the first card that is inserted, I use the slot 0 for it, the 0/0 and 1/0 work with serial card only if I put the HWIC-4ESW in this slots the router does not work, only work in 0/2 and 0/3 but only one, I need to know if there is a command to active it because the data sheet in CISCO indicate that this model of router support 2 HWIC-4ESW. url...
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May 31, 2011
I have my main branch router (3825) and two remote routers (2821's). They are connected through leased lines that do not touch the internet. For various security reasons I have to ensure that the traffic from the remote's are encrypted in a VPN tunnel even though it is still part of a private network.I have went ahead and created the tunnels and I can verify that they are up. I have applied the cryptomap to the correct interfaces, etc.So the question is - How do I ensure that traffic is not just being router out of the interface from the remote sites back to the branch router with or without using the VPN tunnel? I've taken down the tunnels and of course, the traffic is still being passed back and fourth.
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Mar 13, 2012
We have a new 100MB internet service, but we only pay for 10MB and above that is a per/MB fee and not cheap. I want to limit all traffic inbound and outbound only to use up to 10MB on the outside interface of our Cisco 3825.
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Mar 7, 2012
we have a Cisco 3825 router which does not work well with a DSL modem(ISP provided). I have configured the Gi0/0 port of the router to plug into this DSL modem but it does not ping to the ISP gateway. If we do a shut/no shut on the interface then it work fine for about 30 secs. Sometimes even for 1 hr. Then the packets drop and we cannot pass any traffic through this interface.
Now, if the ISP connection is terminated on a computer it works fine. It works fine without dropping any packet.I have tried various options like using a straight/cross cable. I have tried to configure the interface negotiation for 100/full, 100/half, auto/auto and almost all the options.I have also tried to interconnect the devices using a L2 device like a HUB. Nothing works.
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Dec 6, 2012
I have two 3825's. Each has it's own ISP connection. Nat is configued for both. They have an ethernet connection between them and I'm running OSPF between the two so the routes propogate. I have qty 11 Dialer interfaces configured on each router (each router has an exact copy of the other routers dialer interface). However, I only want the Dialers up if the ISP connection on the mated router goes down. Much like HSRP I need one to preempt and be active if both ISP connections are up. When one goes down the other Dialers must come up. Each dialer sends a Dynamic DNS host name and IP address pair to DynDNS.org. So I cannot have both up otherwise the DNS names will bounce between ISP#1's IP address and ISP#2's IP address (back and forth). Let me know if any option exists to make this happen. As an aside the ISP's are providing me DHCP addresses so I cannot work off of an IP, it has to be the physical interface (i.e. Gi0/0).
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Apr 15, 2013
I am trying to configure site to site vpn between Cisco ASA and Cisco router 3825, I need to establish the vpn connection with an interface that has security level of 90.I followed the procedure shown in the following link: URL.
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Nov 27, 2012
We are using 3825 Cisco router with IOS version 12.4(24)T2. The unknown protocol drops on our GigabitEthernet0/1 interface is increasing. This interface is connected to our modem. What could be causing this unknown protocol drops?
cnshaccent-gw-2#sh int GigabitEthernet0/1
GigabitEthernet0/1 is up, line protocol is up
Hardware is BCM1125 Internal MAC, address is ffff.ffff.ffff (bia ffff.ffff.ffff)
[Code]....
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Nov 2, 2011
I have three routers 811 (independent), and the interface cellular 0 resets in all three.
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May 5, 2011
There is a remote server that downloads info from a server here at HQ. When the dowloads start the rxload on the S0/0/0 interface jumps to 98 percent or so; rxload 250/255. I needed to limit the bandwidth utilization between the servers, so I added the below line to the LAN interface on the remote router.By adding the command, it reduced the download utilization -which is what I wanted.
access-list 185 permit ip host 10.6.27.1 any
!
int f0/0
traffic-shape group 185 10000 8000 8000 1000
Question:How would applying this to the LAN interface cause the download utilization (Coming from s0/0/0) to decrease?
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Aug 5, 2012
We recently upgraded our bandwidth and I have to change the ip address on our ASA 5510. I just want to make sure that I am doing it right. All I will need to do is open up the ASDM and under confiugration go to interfaces and make the needed changes to the outside interface. Then under routing I will make the gateway IP change on the outside interface.
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Jan 22, 2013
We bought Cisco Prime Infrastructure 1.2 appliance. The application seems to be pre-installed. I have gone through setup process. But I cannot connect/open web interface [URL].
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Aug 31, 2006
I want to configure a MAC address on my asa 5520 interface.I ask you if exist a private MAC address range?
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Jan 6, 2013
I'm switching to cable internet service instead of DSL. My Netgear router will not work with my cable modem; but it works like a charm with my DSL modem. Is it a problem with the router setup? Good thing I still have the DSL service.
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Mar 20, 2005
I am troubleshooting interface resets on a 3660 connected to a 3550 over Fast Ethernet. I have hard coded both sides for full duplex and 100Mbit. The 3660 is incrementing interface resetes about 4-6 times a day and the 3550 is clean. I have noticed this in other similar configurations as well.
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Oct 8, 2012
I'm having issues trying to dial into the network via ISDN. Setup is
1. Users dial in via ISDN PRI/BRI or POTS.
2. Users using PRI/BRI don't have a problem
3. Users using the POTS modem way are getting disconnected after approx 5 seconds
4. Debug shows a disconnect cause '0xF Loss of DTR'
5. The running config is exactly the same as that of a working 3725 (out of support that's why we're moving to 2911)
6. Only difference is in the AT Command set modem settings where registry S25 is set to 5 on the 2911 but 0 on the 3725
Problem I have is that when I change the registry setting on the PVDM it is accepted, but as soon as I disconnect my reverse telnet session from the line, it reverts back to the default of 5. How do I save the registry S25 setting so that it won't revert back?
I have changed the settings then carried out a at&w - which made no difference. I have also carried out the at&y0 after changing the settings but again, made no difference. I can't find anything on this page Link that shows how to save the settings (but then again, it could be I can't see the wood for the trees).
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Aug 29, 2012
I have a CAB-OCT-V35-FC cable in my Cisco 7200 router and not all of them are utilized. I have to connect another site with a point to point leased line and I am planning to use one of the ports in my Cisco 7200 router which is using the CAB-OCT-V35-FC cable. My problem is both the cable end and the modem is V.35 female connector and both are DCE. I need to build a crossover cable of V.35 male to male which will connect the Cisco 7200 router and the modem.
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Sep 8, 2004
I had the 2 circuits go down at the same time from our ISP and I had to power cycle the router and when it came back up I went from VA # 2 to now VA 3#....I know what is what but it is confusing for my counterpart and I can not remove the old entry for VA#1 and VA#2. [code]
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Dec 1, 2004
I have a cisco 2610 router connected to satellite modem (CDM-600). Cisco has NM-2W module with WIC-2T card, one port of this card is connected to modem via CAB-SS-530MT=, chassis WIC slot is filled with 2MFT-E1. Everything works fine for several hours. Then serial interface (connected to modem) goes down, and never comes up. I see following messages in the log. [code]
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Feb 24, 2012
Does OSPF work between a VSS L3 MEC & an ASA Redundant Interface? Both 6509 are in VSS and a L3 MEC is formed to the ASA.Both ASA ports are a part of a L3 Redundant Interface. Please note there is only a single ASA in this topology. [code] Now, the OSPF neighboring does occur and go into the FULL state on this device, however soon enough, the state enters INIT/DROTHER state.But as soon as I disconnect the physical connection 6509(Standby) The OSPF adjacency goes into FULL mode.
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Jan 23, 2013
i tried to plug my PC with an ether net cable directly to the modem (I turned off the router and only the 1 PC is plugged into the modem) and it does not work.
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Apr 18, 2013
i have a Cisco 7609 with ws-6704-10ge, trying to test a cable that is connected to the 10Gig interface , i connected the other end to a 1Gig GBIC interface on WS-X6516-GBIC, now the speed does not match but how to force the 10Gig interface speed to 1Gig, will that ever work? both has LX optics and the cable is SM
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Feb 2, 2011
I have DSL setup in my house and I want to know if using a cable modem will work and increase my speed. And will it work with a linksys router
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Feb 6, 2013
Is this a wired or wireless connection issue?How to run and post an ipconfig /all output of the computer(s) in question for review.
Who is your Internet Service Provider (ISP)? India - BSNL
What type of Broadband connection are you using? ADSL
What is the exact Make and Model of your Modem, Router or Modem/Router Combo - Linksys, D-Link, Netgear, TP-LINK, etc. TeraCom Type 1
What is the Name of the Anti-Virus, Security or Firewall Software installed from the problematic computer - McAfee, Norton, Eset, Webroot, Zone Alarm, etc.Microsoft essentials.
Modem model Type 1 (TeraCom)
I also have CompUSA Wirelesss Broadband Router, which I am trying to use and make a wireless set up to connect the following devices
1. A Laptop with Windows Vista Home Premium SP2
2. A Laptop with Windows XP SP2
3. An Android 2.3 Mobile phone
I can directly connect the wire from modem to laptop and browse internet - it works. But that is not a wireless network. It proves that BSNL modem alone works.make this network Wireless by using the CompUSA wireless router.
1. The connection set up is as follows:
BSNL TeraCom Modem (LAN 1) ----- wired connection ----- COMPUSA Router (WAN)...... Wireless ....... laptop
2. I can connect to the wireless router by typing 192.168.2.1 in internet browser.Here are the details of wireless router settings
WAN>PPPoE
Use PPPoE Authentication
User Name : ************* (intentionally masking in this forum)
Password : ************* (intentionally masking in this forum)[code].....
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Apr 22, 2011
I have asked this question to an internet service provider and 2 different techs at two differnt computer stores and no one has an answer for me. What is happening is just a few computers you plug them into dsl just through the modem the phone company uses and you cannont get on the internet, you get no internet connection, But you plug the same computer into a router that is connected even to the same modem to get the dsl and it will work right away. Now I understand that the router acts as a dhcp server and the computer is getting its ip address from it, but why won't it pick up one from the modem without the router? When this happens and it is not very often you can use the same modem with the same cabling and plug in another computer and it will get online right away so it is not the modem that is bad and not the cabling.
We had this problem about a year ago with like 5 computers. would not get on dsl, online through the telephone companies modem how ever you would use the same modem and plug it into a router and you could get online right away. At that time the telephone company had a real old DHCP server and the date and time and everything was wrong on it I suppose the battery was bad but they did away with it and use a differnt one going through Netins internet service provider. At that time before they did away with the dhcp server I had called netins and told them the problem they didn't no what was wrong and like I said I spoke with two other techs from two other computer stores and they had never heard of the problem, well now he is having the same problem with two laptops, I was just there today and saw they couldn't get online but you could plug another laptop into the same modem and it would get online with no problem, I took the laptop home and hooked it through my router and it got online right away. So I told him I tnought it was something with there dhcp server that the laptop wasn't getting an ip address from it but then why would another laptop getting plugged into the same modem in a few min get right online.
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Nov 24, 2011
does my router have to be hardwired into my modem in order for my router/ computer setup which is located one room over from the cable modem
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Jun 11, 2011
how do i get a cricket modem to work on windows 7?
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May 5, 2012
After uploading dir-615 dd-wrt firmware, it did not lead me to the new page so I unplug it after 5 minutes and replug it. I tried 192.168.0.1 but it seem nothing came out. Then I found that there is no gateway ip address shown up when I use command prompt to search for the gateway ip address. what does that mean? did I clear the software in it?
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Oct 19, 2011
how to manage internet lan cable and usb modem to work together?usb for mail and browsing ane lan for downloading i used win7,laptop
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May 25, 2011
I cannot get my computer to recognize my Netgear WNR1000. I have called Netgear to explain the issue and was on the phone with them for 45 minutes.They did get the laptop to work but my desktop still does not. They told me it was a browser error. If I disconnect the ethernet cable from the router to my computer everything works perfect.I tried to reinstall the CD that came with the router and as I try to get through step 2 it says no router detected.I think this is my hold up but I have no way to know how to fix this. I tried to go on the Netgear website and they tell me that I have to be able to connect to the internet to download through the router. Well I can't do that because obviously that is the hangup. If I click on my Network Connections. It shows my computer connected to a Network with limited capability and then a big red X going to the internet.
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Oct 29, 2012
I just got an used Pc from auction today.I installed it with Xp Pro. I am trying to connect it to my wire modem but it doesn't work.
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