Cisco Switching/Routing :: 2600 Access To Internet Using NAT?
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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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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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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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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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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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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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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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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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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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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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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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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Dec 2, 2011
How i can transfer the router logs to email address.Wev are using the router 2600.
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Feb 14, 2012
does Cisco 2600 series switch support 802.1x and DHCP snooping?
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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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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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Nov 14, 2011
this is my confguration on cisco 881 . but i am not ablle to access internet from lan.
!version 15.1
no service pad
service timestamps debug datetime msec
[Code].....
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Feb 7, 2012
I have a Cisco 3620 router and I am trying to get internet access. My isp is comcast. All modem lights seem to be operational. But I do not have internet access. I can ping anything other then the router and I am on a home network.
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Mar 2, 2012
I have a Cisoc 2610 connected to my network, 1 Ethernet port and a WIC-2T card. I have ther serial connection to the main router and the ethernet going to the switch. I can ping all device throught the network...but the 2610 can't ping any outside address (no internet connection). I have the internet connection going through my 3745 (which the 2610 is connected to via serial cable). I put a default route into the 2610 but still no luck.
Here are the running configs:
2610:
version 12.3
service timestamps debug uptime
service timestamps log uptime
[Code].....
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Feb 25, 2013
I have installed the six new WAP with model Cisco AIR-SAP2602I-E-K9, and we have two SSID for the new WAPs. When the users are connected to this WAP they can able to access the intranet but not able to access the internet. What could be the problem? I have checked and verify that they can able ping to the IP address of google from the CMD but when try from internet explorer they are fail (both with www.google.com & with IP address of google).
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Jan 21, 2013
I'm currently undergoing CCNa academy so I got a "job" from my boss to configure Cisco 871 router. Unfortunately we just finished first semester at academy so there are some things that I'm still having hard time to understand. I managed to configure router so it connect to internet or to be exact it has internet access through another adsl modem that is in bridge mode. url...The problem is that users are not able to use internet when connected to this router. I'm able to access router through telnet ( ip 192.168.13.10) but that's it.192.168.13.0 255.255.255.128 is network that we use at work. 192.168.13.5 is IP address that is assigned to zyxel adsl modem ( If I'm correct, we could have used any address here since we are connecting this directly to router ? ) Zyxel adsl modem is connected to FA4 port on Cisco router. LAN cable is connected to FA0 port and from there it goes to switch ( it's some asus switch with 50 ports). [code]
If I ping google dns from router e.g. ping 8.8.8.8 it works. If I ping url... it doesn't work. Also I'm able to access router via 192.168.13.10 but if I use router as default gateway then I'm not able to access the internet.
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Mar 16, 2013
i have one SF300-24p switch where i setup some Vlans and echolife hg8245 ONT router to access internet. the diagram is the following
VLAN1 (Subnet of users) -----> Switch SF300-24p
VLAN2 (Subnet of users) -----> Switch SF300-24p
VLAN3 (HG8245) -----> Switch SF300-24p
VLAN4 (Servers) -----> Switch SF300-24p
i want to control access to internet on VLAN1 and VLAN2 (access on VLAN3), while providing access to VLAN4.My problem is in connecting to internet, i can't find a way to "route back traffic to VLANs 1 and 2 since HG8245 don't seem to provide proper static routing ON LAN interface. Maybe without resorting to changing the HG8245 router ?
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Jun 12, 2012
We have cisco 3550 switch i have configured 3 vlans in this switch vlans are not able to accessing internet
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Mar 19, 2013
We have a Cisco 3750 stack connecting to the MPLS router, able to ping 8.8.8.8 - [URL], the internal users on their own Vlan can ping the default gateway the 3750 switch but no further, trace route from the PC/Servers stops at the 3750 stack.We have the switch configured to ip route 0.0.0.0 0.0.0.0 to the public interface in the MPLS router, from the switch I'm able to ping the internet.
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Oct 31, 2012
i have router 1841 have 2 interface.i make routing between vlan by subinterface in router and in switch trunk but vlan 5 cannot access internet
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Aug 12, 2012
I have 5 SVIs configured for VLAN Interfaces 121-125 for my vSphere environment.
All VMs can ping IPs on all the VLANs (VMs on VLAN 124 can ping VMs on VLAN121)
All VMs, except those on VLAN 124, can access the Internet or even ping my router IP.
If I change one of the VLAN 124 VMs to use a different VLAN, and update the addressing appropriately, it can access the Internet.
The problem is exhibited with Windows and Linux VMs. So, I believe something in my switch setup is the problem with VLAN 124 in particular.
If i do a show vlan brief, VLAN 124 is listed.
If I do a show ip int brief, VLAN 124 is listed as upup. I also tried to shut o shut the VLAN 124 interface.
Only one specific VLAN has connectivity problems?
My topology is Catalyst 3560 to home router to Internet.
Here is my IOS image: c3560-ipservicesk9-mz.122-55.SE6.bin
Here is my show run output:
3560_02#sh run
Building configuration...
[Code].....
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