Cisco Switching/Routing :: 2600 - Router With Cable Modem
Jan 24, 2012
I have a cable modem with my 2600 Router and i have a little speed problem when I'm going out to the web via my F0/0.. according to regular speed test sites my speed is around 20mbps but when i hook up to my modem directly i get a solid 40mbps.. now I've changed my Cat 6 cable from my modem to my router and this are my settings in the router.
[Code] ...........
I see some drops and lost carriers but not sure what those might mean?
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May 2, 2012
I'm trying to configure a disco router 2600, my internet connection is via a cable modem. I get a dynamic IP from the cable modem but when I ping to any external IP I have errors.Copy show config and show interface f0/1
GUEST#show config
Using 1103 out of 29688 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
[ code]...
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Sep 8, 2012
I am with Virgin media and have a home lab (2611 routers, 3550 switches, 2950s etc) which i usually just use for testing things on and practicing.
Now I tried to connect it to the internet and got some weird things happening.
I got NAT and DHCP client all setup correctly on the router (or so I think!) along with DNS settings but I still can't get Internet access.
My network is all setup right so that through using OSPF the router is the gateway (0.0.0.0 route) for all devices. Doing a traceroute confirms this.
Yet I never get any further than the router? I see IP nat translations ticking up as I send more requests but never get a webpage or a reply from any of the machines in my network.
HOWEVER... The router itself does get some replies from Google.co.uk and bbc.co.uk but doesn't seem to want to give anything else on the "inside" a response?
Here is a dump of config:
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
[Code].....
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Oct 1, 2012
I am having an issue with my network that has me perplexed. I have a DPC3010 cable modem (Charter internet). I previously had it connected to a Linksys WRT54GL with DD-WRT installed and that was working OK except that I had to reboot it 2-3 times per week. I replaced it with a Cisco 861 (non-wireless) router and it worked OK for a few hours then it started dropping the internet connection (it goes up and down constantly). If I switch back to the Linksys everything works fine again. I am using the same cables in either case so I know it's not a cabling issue. I upgraded the firmware to c860-universalk9-mz.151-4.M3.bin, but it made no difference. I was starting to suspect a problem with the physical ports on the router, but I decided to try connecting the 861 behind the Linksys and turns out it works fine in that setup.
So to recap...
If I connect the 861 directly to the modem my internet connection bounces up and down
If I connect the Linksys directly to the modem my internet connection is fine
If I connect the Linksys directly to the modem and the 861 to the Linksys everything works fine (my PC is connected to the fe0 port of the 861)
Are the 861 and the modem simply incompatible or is it a configuration issue? I have attached my 861 config to this thread.
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Oct 25, 2012
I am connecting a 2600 router to an ISP. Interface 0/0 is connected to the ISP using DHCP. Interface 0/1 is connected to the inside providing DHCP services to the inside. At least it should only be providing DHCP services to the inside. I also have a public static IP that is NAT to a private static IP. Everything is working except the computer on the static IP. From the router I am able to ping inside and out from each interface. I am able to ping both interfaces of the router from the computer on the static IP but I cannot ping outside the router. If I do a debug all I see a reject for the gateway of the static IP but it has “mobile IP” in the text string. Not sure what mobile IP is relating to. Networks are as follows:
0/0 DHCP 10.X.X.X
0/1 192x.x.x
Static 75.X.X.X
no ip dhcp use vrf connected
ip dhcp excluded-address 192.X.X.1
ip dhcp excluded-address 192.X.X.2
ip dhcp pool CLIENT
[code]...
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Jul 8, 2012
I have a 2600 router and im trying to set it up for SDM. The crypto command is not there. What do i do?
show version
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-J1S3-M), Version 12.3(15b), RELEASE SOFTWARE (fc1 )
Copyright (c) 1986-2005 by cisco Systems, Inc.
Compiled Thu 25-Aug-05 13:38 by ssearch
Image text-base: 0x80008098, data-base: 0x81A255C4
[code]....
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Mar 28, 2012
I have a 2600 Router series and I cannot remember the Password. I have tried following web pages that state to use control Break on the boot up but its not working.can reset that pw and write erase my configuration file?Here is my boot up. I have tried hitting control break at the very beginning over and over and then again when at the cold boot it has not worked....
System Bootstrap, Version 12.2(7r) [cmong 7r], RELEASE SOFTWARE (fc1)Copyright (c) 2002 by cisco Systems, Inc.C2600 platform with 131072 Kbytes of main memory
program load complete, entry point: 0x80008000, size: 0x1c9468cSelf decompressing the image : ######################################################################################################################################################################################################################################################################################################################################################################################################################################################################## [OK]
Smart Init is enabledsmart init is sizing iomem ID MEMORY_REQ TYPE00036A 0X000B3B80 C2610XM Single Fast Ethernet 0X00098670
[code]....
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Apr 28, 2013
- How can I connect an old 2600 router to a linksys WRT54G2. to access the internet. I think it is not possible
- What device do i need to be able to do it
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Aug 30, 2012
I have been saving money to build my ccna voice lab. Recently I bought 2600 and 1700 series routers.One of the 2600 router needed a password recovery so after a refreshing nap i got to work.
During the password recovery procedure, I mistyped confreg 0x1242; by the time I realized my mistake, my computer screen was full of "C" characters Now the whole story is i can not console into it.
Edit:After some research, I found If I use the baud rate 1200 in hyperterminal.i will be able to console into it.When I did that, I noticed that Rommon kept incrementing as:
rommon 1 >
rommon 1 > confreg 0x2142
rommon 2 >
rommon 2 >
rommon 2 >
rommon 2 >
rommon 2 > confreg 0x2142
rommon 3 >
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Jun 27, 2012
I recently lost my configuration when attempting to reset the password for our Cisco 3560g switch, the switch connects to a Cisco 4506 switch via fiber back to our main office.
I have the switch temporarily routing all traffic to our 4506 by using the default route of 0.0.0.0 0.0.0.0 10.10.10.254 but the same switch is connected to a cisco 2600 router that is on a 10.10.20.0 network and the 3560g is on a 10.0.0.0 network.
Host computers sit on the 10.0.0.0 network, but they need to go to the 10.10.10.0 network for internet, domain, etc the same computers need to go to the 10.10.10.20 for remote connections and other services.
The address of the 3560g is: 10.0.0.254
The address of the 2600 is 10.10.20.2
When the default route is set to 0.0.0.0 0.0.0.0 10.10.10.254 (4560 switch) domain browsing works perfectly
When the default route is set to 0.0.0.0 0.0.0.0 10.10.20.2 (3560G) switch I can ping any ip address in that range and the address on the other
interface ip adresses on the 2600 (eg. 10.10.30.1 / eth2, 10.10.40.1/ eth3 etc.)
I have tried to weight the routes after adding them both to the configuration, but that doesn't seem to work at all.
The switch connects back to the office via vlan1 (10.10.10.253)
The 2600 is connected to port 1, which belongs to Vlan2 (10.10.20.1)
And client computers sit on ports 2-12 belonging to Vlan10 (10.0.0.240)
So in a nut shell, how would I go about setting it up so the machines on 10.0.0.0 can connect to 10.10.20.0 and 10.10.10.0 and vice versa at the same time? Everything was working fine until I rebooted the switch (3560g), which makes me think the person that configured this before me didn't save the running config to the start up config.
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Oct 8, 2012
I have a Home Virgin media cable connection at home. the only way to get this working with my Cisco gear is by putting the superhub on modem mode.On modem mode, it becomes just a dumb modem assigning and IP via DHCPI can get the switch to get an IP address from the modem with
no switchport
ip address dhcp
then I have created
0.0.0.0 0.0.0.0 fa0/48
to route traffic to the port connected to the mode,The switch gets the assigned Ip address from the modem but it does not route internet traffic.
From the different vlans and subnets on the switch, I can ping the modem.
From the switch I can ping 8.8.8.8
From the machines, i cannot ping 8.8.8.8
On my machines, what should be the gateway? the vlan SVI, the modem's IP address, The fa0/48 ip address? I have tried them all with no success.
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Dec 2, 2011
How i can transfer the router logs to email address.Wev are using the router 2600.
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Jan 10, 2012
My network generally runs older routers (2600 series) with 16 port switch modules (NM-ESW-16). This has always worked great since I can configure the router and the switch ports on the fly, making changes to either as necessary. Well I am upgrading to 2811 routers, and we wanted to get gigabit ethernet ports on our switch modules. I think I made an error when I purchased a few of these switch modules: NME-16ES-1G.
The first problem, is that the switch ports don't even show up on the router config, I have to establish a session into the switch, (And I can't seem to get back to the router unless I manually switch off power and restart). I don't like this type of switch module, it's like I'm running a completely separate device, and while having a layer 3 switch is cool, It doesn't let me setup routing protocols so I don't like doing it this way. I want to go back to using a switch module that simply adds a ton of ports to my router like the NM-ESW-16. (Note: The NM-ESW-16 does actually work in the 2811 and would be perfect if it were Gigabit speed.)
The seconds problem is that the NME-16ES-1G isn't actually a Gigabit switch. It has a single gigabit port, but the 16 ports are all Fastethernet, and not gigabitethernet. So ideally, I am looking for a switch module that I can fully configure from the router interface that has 16 gigabitethernet ports, and works with a 2811. IE I want to do this. [code]
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May 21, 2012
We have two MPLS circuits managed by two different suppliers, one carries VOICE the other DATAWe are to decommision the VOICE MPLS and have increased the bandwith of the DATA MPLS to carry VoIP traffic too.
At both of our sites A & B ,devices connected to the LAN have a default gateway of the VOICE providers Cisco 2600 router , which then goes into the LAN switching. (see diagram)So what I am trying to achieve is toto simply replace these 2600 routers from the VOICE MPLS provider with our own so we dont have to change the default gateways at both sites.
Testing
Our Cisco 2600 routes are plugged into each LAN switching environment with two subinterfaces configured, one for voip and the other for dataThe problem is from the router and respective subinterfaces we can get to the other sites destination without any issue, but if for example a user is at site A with Ip address 10.16.11.12/16 they cant ping the VOIP subnet at site B 10.3.11.0/24. But If a ping is issue from the Site A test router then the 10.3.11.0/24 subnet is reachable but only on the 10.3.12.0/24 configured subinterface.So i guess what Im saying is 10.16.0.0/16 from the LAN needs to be able to get to 10.3.11.0/24Note at site A 10.16.0.0/16 & 10.3.12.0/24 can communicate no problem and at site B 10.207.0.0/16 & 10.3.11.0/24 can communicate no problem.We are using IP routing, should we be using route-maps?
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Nov 17, 2011
I need to configure an existing 2600 router to use dynamic NAT for access to the web and ALSO I have (5) fixed IP addresses for use with an email server, a web server, and (3) future servers. I do not know the concept of how to set this up. I'm currently using dynamic NAT for the web and this seems OK but I dont know how to map my fixed servers. I assume this is done with static NAT. Do I need to add sub interfaces on the S0/0 T1 interface for each of these fixed IPs? Then do I somehow do static NAT on these fixed IPs to their respective servers?
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Jun 5, 2011
trying to establish a connection on an ibm 3745 controller via two IBM 5822 modems to a cisco 2600 router using sdlc encapsulation secondary bridging data from the serial port to the E/Net port to run the 3270 client ???
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Mar 17, 2013
i have a simple router on a stick config which is providing dhcp to a customer SSID. however i don't want employees to stay on it and eat the band width since its open. the lease is set to an hour, is there anyway that i could set it so that once your lease expired it can't be renewed for 4 about 8 hours? I am using a cisco 2600 router in this setup.
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Jun 26, 2012
We are upgrading our incoming Internet service from 30 Mb 10/100 to 100Mb 10/1,000.Will my 2600 series router support the 10Mb 10/1,000 traffic from my new modem?Do I need to change my interface speed from 100 to 1,000? I to be sure my router will support the upgrade. [code]
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Nov 10, 2011
- I have an older router 2600 running 12.1(4) IOS.
- There are a few clients connected to it via the frame relay connection.
- There is an IP that clients access 192.168.1.10 for example
- We need to do a NAT for this IP for one specific client only like "ip nat inside source static 192.168.1.10 1.1.1.1"
- However if I do that, that will effect other clients too
- On the interface for this client I'll be using "ip nat outside"
- Is there a way to accomplish this without effecting other customers?
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Dec 2, 2011
I've been working with these two Cisco devices in my home off and on for several months now but I just can't take it anymore, I'm about to throw them away and go back to Linksys router.
I have a Cisco 2600 Router with only one Ethernet card in it so I have to trunk from my 3550 Switch to that device. I'd like to have my ISP and all users plug into switch and all trunk back to the router's sub interfaces. Currently, I have started over...again, and am unable to simply get the router and switch to ping each other if I put sub-interfaces on the router. See my configs:
2600 ROUTER:
Router#sho run
Building configuration...
Current configuration : 555 bytes
[code]......
3550 SWITCH:
Switch#sho run
Building configuration...
Current configuration : 2302 bytes
!
version 12.2
[code]..........
Port F0/24 is in VLAN 1, as are all ports but Port F0/1 which is my desktop PC. I mocked it up in Packet Tracer and it works just fine. This is just a simple setup and I'm making sure I can ping between switch and router before I move to each next step.
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Sep 17, 2012
I am trying to configure SDM 2.5 on a cisco 2600.I have access via telnet to the router and was able to change the enable password - which i think is level 15 (right?) and setup (and bring up) the ip on the ethernet interface. I can ping - and get response from - the router Trying to install SDM on the router i need to provide the default username i tried both admin/administrator but SDM can't communicate with the router?
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Jul 30, 2012
We have recently leased an internet connection in our office which comes from the service provider as radio link and BW is 2M. I have clients more than 60 that will share the connection and access internet. I have configured a Cisco 2600 router as below:
Building configuration...
Current configuration : 988 bytes
!
version 12.2
no service single-slot-reload-enable
no service timestamps debug uptime
no service timestamps log uptime
[code].....
So far I have read regard NAT it degrades performance as it need to translate every data packet comes from the source and goes to internet. So a question comes in my mind is there any other way how I can share this connection among users with private ip address? Or NAT is the only method to share internet connection among users with private ip addresses?
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Jul 9, 2012
I have a Cisco 2600. I would like to know how to redirect traffic going to a certain IP address three hops away to an IP address on a locally connected segment.
Ex. Packet leaves a device with source IP of 10.10.10.10 and destination of 20.20,20.20 When the packet hits the router (10.10.10.1) I want the router to redirect the destination of 20.20.20.20 to 30.30.30.30 (locally connected segment).
The router has two physical interfaces.I am thinking along the lines of creating a VLAN with an ip of 30.30.30.1 and then doing a NAT translation from 20.20.20.20 to 30.30.30.30.
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Mar 27, 2012
We have Cisco IP phones behind a 2600 series router:Most of the time when the PBX receives a packet from the phone, the source IP of the packet is set to the public IP of the router (1.2.3.4) as expected. However, once in a while, we get packets (at the PBX) with the source IP set to the private IP of the phone (10.0.0.12).The router is configured by our provider, and they can't give us any explanation for this behaviour. Is it safe to assume that PAT is not configured properly at the router?
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Feb 7, 2013
So I have a 2600 that I have configured three sub interfaces on. FA0.0.1 is set for DHCP and supports VLAN 1. FA 0/0.2 for Voice, FA 0/0.3 for Data. I have this router interface plugged into FA 0/24 on my 3550 and the 3550 is configured as a dot1Q trunk (I have attached configs for RTR and SW).I have most ports configured as access VLAN 1 which is where i have my ISP connection plugged FA0/1 on the 3550. When I connect the service provider link FA0/0.1 never picks up an address. If I take my internal DHCP server and connect it to FA0/1 of the 3550 it snags an address almost immediately.In my mind this validates that my config is fine. I also took the same cable from the service provider cable modem and connected it to my laptop and the laptop is pulling DHCP.
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Feb 5, 2012
How to configure my serial modules on my 2600 and 3640? Each router has the WIC-2T with two cables connecting them. I tried to ping one router from the other, but no luck. Serial IP address I just made up, this is my home lab, so if I messed those up some how,
Here is the running config for each rotuer:
2610:
Current configuration : 1071 bytes
!
version 12.3
[Code]...
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Jan 24, 2013
I’m working with a managed switch that has three V LANs setup on it. Recently the domain changed and the wireless V LAN can no longer access the internal website. I found access rules, in the switch that allowed the wireless V LAN to use the DNS server on the private/staff V LAN. Their DHCP scope is on the switch and DNS is set there. The Website is also on the V LAN with the DNS server. This configuration totally cuts out external DNS usage. It stopped working though. It is as if when things switched on the Domain the wireless users were denied DNS requests. The switch was not touched at that time. I’m looking at it though and it seems that I may have conflicting rules.
The version is 12.2. I believe its a Catalyst 2600~
DHCP scopes: ip dhcp pool INSIDE network 192.168.1.0 255.255.255.0 default-router 192.168.1.1 dns-server 192.168.1.6 192.168.1.4 domain-name saline.lib.mi.us
ip dhcp pool WIRELESS
network 172.16.0.0 255.255.255.0 default-router 172.16.0.1 dns-server 192.168.1.6 192.168.1.4
Here is the V LAN Setup:
Interface Vlan1
ip address 192.168.1.1 255.255.255.0
[code]...
Here are two access lists that should be allowing the traffic from 172.16.0.0 into the list IPs/Ports. These do no work.
ip access-list extended WIRELESS-PRINT
permit tcp 172.16.0.0 0.0.0.255 host 192.168.1.12 eq 30044
permit tcp 172.16.0.0 0.0.0.255 host 192.168.1.12 eq 21326
permit tcp 172.16.0.0 0.0.0.255 host 192.168.1.12 eq 6987
[code]...
During my testing I removed the Deny rule and everything worked. deny ip 172.16.0.0 0.0.0.255 192.168.1.0 0.0.0.255
However, the “ permit ip any any “ rule, makes all the port rules pointless because when this rule is in place solo, I can ping and access everything on the 192.168.1.0 network. Is there a way to deny everything, except what I permit? Because when I remove the ip any any, then they cant even get out. Perhaps there a better way to say, the wireless users can get out but only get into the sub net over specific ports? I have a feeling it may have not be thought out entirely when initially created. However, the big mystery is that it worked before secondary domain controller failed.
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Mar 23, 2012
I can't get a new IP from my ISP when my Cable modem router(EPC3925) is set to router mode, i have tried factory restore, unplugged etc..but still no luck. It changes each time i reset it when i set it to bridged only mode but then i won't be able to connect other devices to it since it doesn't uses DHCP in bridged only mode. It changes back to the IP i had when i set it to router mode. I don't want to change my router settings to bridged only because it would disconnect the other devices in my house. Why my ISP assigns the same IP address when it's set to router mode but assigns different IPs when it's set to bridged only, how is this possible ?
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Mar 14, 2013
I am new using cisco router 2600, i want to use dmz like adsl modem to direct ip public to ip lan like 180.15.22.x.x to ip lan 192.168.1.2 ( lrouter mikrotik ) outside to inside so when i call ip public then forrward to mikrotik
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Feb 7, 2012
I have a cable modem installed to my property but want to use my modem/router to go wireless. The proble is my cable modem output is a RJ45 and the router input is RJ11.
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Feb 14, 2012
does Cisco 2600 series switch support 802.1x and DHCP snooping?
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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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Sep 7, 2012
config to setup PPPoE on the cisco 831 router to be used with a modem in bridge mode. I have tired other peoples configs found on the web but, not all the commands were available on the IOS version thats on the router. Also note that I bought this as a used router and I dont have a service contract so I am unable to download an updated IOS. The router ver is 12.3(7)T9 and the IOS is c831-k9o3sy6-mz.123-7.T9.bin. Running config below is last tried still could not connect or get ip address from isp. [code]
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