Cisco WAN :: 861 WAN Changed From DHCP To Static IP And Now Can't Ping
Jan 21, 2011
My old office uses Cisco 861 as a VPN router, with the WAN side setup to receive a dynamic IP assigned by Time Warner cable. Now we switched to a new office, with TowerStream which provide 4G SLA'ed 10Mbit service with static IP, and I get a Cat 5 ethernet down from it.
So all I did, was to go my "interface FastEthernet4", and typed ip address 173.243.123.123 255.255.255.252.Changed speed to "speed 100" and "full-duplex" (as instructed by the ISP).
I also did "ip default-gateway 173.243.123.124", which is the default gate way assigned by the ISP.I also typed "ip name-server 64.17.123.123" to setup the new DNS, am I doing anything wrong? I can't even use the router to ping google, but if I connect the laptop directly to the outside line, then it works, so I know the outside line is good.
Why can't I connect to the internet? I wasted several hours already trying everything in my book to trouble shoot a supposedly very simple configuration change. Do I need to change something related to NAT when changing to Static IP? My NAT was working just fine before when under DHCP.
The below is my full config (some IPs changed to preserve anonymity):
=============================================
Building configuration...
Current configuration : 16628 bytes
!
version 12.4
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
[code].....
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Mar 12, 2013
Today I installed the 1.0.2.6 Firmware on a RV180W. I only have now two problems regarding the Static DHCP support in the GUI.
1. Via the Networking > LAN (Local Network) > Static DHCP I have no buttons to Add a new static Lease.
2. Via the Networking > LAN (Local Network) > DHCP Lease Clients I can thick a Lease and click on Make Static IP. The result is an error: Operation failed.
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Oct 26, 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
[Code].....
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Jun 27, 2012
I have setup Cisco Asa 8.4 Lab in GNS3 to understand new Nat changes in asa 8.4 because im new to asa.
I have configured one of my internal webserver to static NAT with one public ip. Im able to access hosted webpage from static public ip 192.168.1.4 means NAT is working fine, the problem here Im facing i'm not able to ping to Mapped public IP 192.168.1.4 from outside interface sitting on pc (ip 192.168.1.100) which is also connected to same outside network and neither from ASA console but Im able to ping outside interface ip address which is 192.168.1.3 from pc (192.168.1.100) and from asa console.
This how my network topology
Inside Network 192.168.72.0/24 outside Network 192.168.1.0
inside ip 192.168.72.2/24---------------ASA8.4-----------------------outside ip 192.168.1.3/24 (connected to ADSL router 192.168.1.1)
[Code]......
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Feb 7, 2012
I have a Blackberry Playbook and have come into a problem with it.I can't set a Static IP on it so would setting a DHCP Reservation in my Linksys E2500 router act as a static IP?
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Oct 25, 2011
I defined a static route: 192.168.0.0 / 255.255.255.0 / 192.168.1.201 (gateway), I can connect from 192.168.1.0 to 192.168.0.0 but we cannot ping in this local network. We have a CISCO 18000 as a VPN IP configured between this two local network.
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May 28, 2012
For numerous reasons, I want to bind my DHCP clients to static IP addresses, but can't figure out how to do it in DD-WRT.
I've googled, but every link I click times out (for this specific search- my uplink is otherwise fine).
I know I can do it with hardcoded IPs, I'm just curious how static DHCP is done (and yes I am aware that Static is a contradiction in terms of DHCP. I want a given MAC to always get the same IP) and would like to have some info on this.
(call this reserved DHCP if you prefer... )
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May 7, 2011
I have a machine with Windows Server 2003 running an Exchange Server in a office with 5 workstations attached. The server is being used for a basic outlook calendar across the various workstations, nothing major. Our current ISP provides us with a Static IP address. The party that installed and configured the server set it up to run the DHCP server on the server PC itself. As in, the machine running windows server is also running a software DHCP server for the entire network. THE SETUP: As of right now we have a wall port (internet access) with a cable running to a 8 port unmanaged netgear switch that has cables hooked up to the 5 workstations as well as the server itself. Pretty simple.THE QUESTION: How do I configure the ISP static settings on the DHCP Server portion of the Server PC? We may be getting a new ISP with a dynamic address OR a new static address. WHAT I'VE TRIED: I've tried configuring the IP address on the Server PC the way I would via the NIC adapter settings but it already has a internal IP address from the DHCP Server running on that PC so changing that was no good.
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Aug 22, 2011
I'm totally new to using Windows Server 2003 (or any windows server edition) but I do have a basic understand of networking. I have a machine with Windows Server 2003 running an Exchange Server in a office with 5 workstations attached. The server is being used for a basic outlook calendar across the various workstations, nothing major. Our current ISP provides us with a Static IP address. The party that installed and configured the server set it up to run the DHCP server on the server PC itself. As in, the machine running windows server is also running a software DHCP server for the entire network. As of right now we have a wall port (internet access) with a cable running to a 8 port unmanaged netgear switch that has cables hooked up to the 5 workstations as well as the server itself. How do I configure the ISP static settings on the DHCP Server portion of the Server PC? We may be getting a new ISP with a dynamic address OR a new static address.
I've tried configuring the IP address on the Server PC the way I would via the NIC adapter settings but it already has a internal IP address from the DHCP Server running on that PC so changing that was no good. I guess what I'm basically looking for is a screen like this (I hope you're familiar with the configuration pages of Linksys Routers) url...
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Nov 7, 2012
I have 5 Static Ip pool all IPs are working fine. I have deploy a IIS Server on Windows2008 and configure the Static IP on that server. earlier it was working fine . but since last month the IP is not pinging from Out Side but internal IP Pool its working. I have checked the SERver firewall and another Setting is Ok. if i changed the Ip from the server the new IP is also not pinging.
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Jul 5, 2011
I have strange problem I am using my static ip system since two year, I dont have issues so far, since two days I am facing a strange issue when I am piging my system I could able to see reply,
but when I am trying to connect via MSTSC..blank screen even I am unable to get login screen also...
I have tried to connect to log mein and team viewer all are having the blank screens
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Sep 30, 2011
Can the DHCP server on an ASA be configured with static bindings like IOS routers can?
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Feb 5, 2011
I am having trouble connecting to the internet, but not my network, when I assign a static IP to my machine. However, when it's set to DHCP, it works just fine.
Pertinent info:
-I'm connecting to a Linksys WRT610N router via a wireless USB adaptor, Netgear WNDA3100v2;
-Service is Time Warner Roadrunner cable;
-There is no IP conflict as I've got DHCP range set from .200-.249 and this machine's static is .100;
-All the other devices in the house are on static starting with .101 up and they all work fine, both wired and wirelessly;
-Can see and connect to all devices in the LAN, including the router, but nothing outside
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Feb 22, 2012
I have my boss's (president of the company) laptop, wired LAN port, setup with a static ip so his laptop will bypass his company's web filter, and was going to let him use the wireless for home and travel. However, what if he needs to use his LAN port on a different network that doesn't support the ip's of our company's network? I need to see if there is a way, utility, or something that can be done to allow him to have a static ip assigned to that port and use DHCP (for when he is on other networks) so he can bypass the web filter.
I have a rule on the FW to allow his static ip to bypass the web filter. I have tried the alternate configuration inside XP and editing the registry to assign that nic dual ips, but I still get blocked on the filtered webpages. For now I have just emailed him the steps on how to switch it manually.
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Aug 8, 2012
I have a Cisco 876 router running 12.4.(15)T5, configured as DHCP client. This works nicely.
A Cisco 886 router, running 15.1 software also works with the DHCP client. This also works but has the following strange beheaviour: In the running-config an ip route 0.0.0.0 0.0.0.0 <dhcp assigned address> appears. Also - some other static routes that are in the config using the dhcp keyword are duplicated with the dhcp-assigned address
Now - when a write mem is done, these dhcp-generated route entry's are stored in the startup-config...
This beheaviour is completely different and VERY unwanted. After a change from DHCP server the config will simply stop working, when a write mem was done at the first DHCP situation.
Should we stop using write mem commands when a DHCP client is active in IOS? Is it a bug? Is it a feature?
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Feb 2, 2013
I used to use a CentOS self-made server for intranet for my little office, but I bouth few days ago a Cisco 861 router to replace the linux box.
1. I have 2 public IP classes from my ISP. 1 class is limitted to 80mbit upload, the other to 30mbit upload. So I need some sort of DNAT to be able to know exactly which intranet computer uses big internet and which one limitted internet.
2. I need DHCP server and with static IP addresses (one computer must always have the same IP address, etc).. i have my needs for this.
3. Also I need external access to some servers inside (web, ftp, etc) [code]
So far so good, all looks simple and I can achieve this in 2 hours on a centos linux box (correct routes, ip forwarding enabled and few iptables rules for NAT/SNAT/DNAT).
But on this brand new Centos router well, i'm not even successful in pinging the outside world, nor the inside world I'm tired of reading the forums, the documentation..i want (at first) a simple scenario: vlan+dhcp, fa4 with 1 public ip address and ACCESS to the real world. I wasn't able to achieve not even that much. [code]
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May 19, 2013
I'm having troubles with this firmware in a SG300-28 switch. Actually the DHCP server, a new feature in this firmware release, doesn't work correctly. DHCP static reservations are not working: CLient ID and MAC address are not recognized correctly, and the DHCP server assigns the first free IP in the pool, rather than the reserved one.If Cisco engineers read this, plese correct the issue.
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Jul 30, 2012
I'm experimenting a strage issue with some AP1142 that prefer getting new IP from DHCP server rather than using the static ip already configured.
I've got more than a hundred of 1142 APs already conected to a 5508, all with static IP, all working fine for about a year.
As i installed 30 more AP, i enabled a dhcp scope on the controller to give IP to the new APs and when the new aps got registered i changed the configuration to static IP.
The problem comes when some of the older AP than have already static ip are gettig ip from dhcp scope.
If i look at my WCS, it reports that this APS are getting DHCP IP because they cannot reach the controller with their static ip. As this is impossible, because the static ip and the dhcp enable scope are in the same subnet in a layer 2 configuration and with the same gateway. (e.g: old AP 10.10.2.10/16; new AP(dhcp 10.10.3.10-50) 10.10.3.15/16; gw 10.10.254.1)
The problem comes when i disable the dhcp scope, all the older aps that got dchp ip from the wlc scope instead of using their staic configured ip are deregistered. If i reset every ap manually, from the swithc disabling PoE, they start to use the static ip and everything comes fine.
This is happening with about ten of fifteen APs from the 100 installed, that is the strange thing because this seem to be very random as the failing APs are installed in different building and connected to different switches.
As now i have disabled dhcp scope and all APs (old and new) have static ip everything is ok, but i will have to add some more APs shortly and every time i enable the dhcp scope on the wlc
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Aug 28, 2012
My parents Windows 7 PC has suddenly stopped being able to connect to the Internet. Using the "Diagnose problem" feature in the Manage Network Interfaces panel results in a message claiming that it cannot reach the DNS server and that the connection needs to be reset. Doing so has no effect. It is connected to a DSL router via an ethernet cable.The NIC is set to dynamically receive its IP and DNS settings via DHCP which it obtains from the DSL router. Executing ipconfig from a DOS prompt shows that this is occurring as expected, with an assigned IP of 192.168.2.10. The gateway and dns are set to the IP address of the router, which is 192.168.2.1. Note that I can't even ping the router at 192.168.2.1.I also tried static settings in the available range and tried using open DNS IP addresses.
They also have a laptop which connects to the same router wirelessly using DHCP and it is working fine. Using this laptop, I can log into the router and see both it and the problem PC in the list of connected devices, each with the dynamically assigned IP addresses as seen using ipconfig on each. Unplugging the ethernet cable shows the connection status changing in the list of connected devices in the router. From the laptop, I can ping the router and running ipconfig shows that it obtains the same gateway and dns as the PC and the next available IP - 1292.168.2.11.So this leads me to believe the following:
1- The router, NIC and cat 5 ethernet cable are working fine at the hardware level.
2- The DNS settings in the router are fine, as the laptop works
Perhaps coincidentally, the same day it stopped working they received one of those bogus "This is Microsoft calling" calls claiming their PC was infected, but they had heard of the scam and hung up. Naturally, I started suspecting a virus, but a full system scan using McAffee produced nothing. If it was a DNS changing virus, would I not still be able to ping the router using the IP address?
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Feb 25, 2013
Region : Australia
Model : TD-W8960N
Hardware Version : V4
Firmware Version : TD-W8960N_V4_130205_Beta
ISP : TPG
I have an Optus Home Zone (mobile cell tower) that requires ports open.
Port
123 UDP
500 UDP
4500 UDP
I have assigned the Home Zone a Static IP outside the DHCP range and set the above Ports on the NAT, Virtual servers to that IP address.
I have used nmap to scan the ports and it provides open/filtered status for all of them.
Here is the kicker for me, i use a DGN3500 netgear (which keeps dropping WiFi hence its replacement) and enter the ports and it works straight away. Un plug and put the Tp-Link and nothing.
I use Eset Smart Security, could that be the problem?
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May 31, 2012
i am not sure if this is something with my DHCP setup or not, but it certainly seems to be the culprit. I am running a 3560G and using it as DHCP and to do V LAN routing (Geiger protocol). I have 10 pools configured with a few static addresses per pool. Now to get down to the problem. I have a computer (and this problem seems to be a gremlin as it changes what computer is affected quite often) that will connect, get its IP, immediately disconnect, then send out a DHCP req again. The computer has a static assignment in the pool, and for the brief second that it connects, it gets the right address. If i move the computer to another v lan, all works right. If i delete the static entry it will get an address in the right v lan no problem. The command i have been using to add static entries is:
address xxx.xxx.xxx.xxx client-id 01xx.xxxx.xxxx.xx
That seems to have been working on all my static routes except for a bank of computers in vlan3. I have went as far as to delete the pool and recreate it, heck i even recreated the v lan and i am still having issues. Below are some snippets of the running config for review.
The DHCP Pool for the affected LAN:
ip dhcp pool Dev3
network 192.168.3.0 255.255.255.0
boot file bootx86wdsnbp.com
next-server 192.168.1.78
dns- server 192.168.1.8 192.168.1.78
[Code] .....
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May 17, 2013
I upgraded my SG500 switch firmware to 1.3.0.59, since there is a new functionality DHCP server v.4 well I must say I came accross the issue I cannot solve. DHCP server assign dynamic address - no hassles. troubles start with static IP hosts.I defined a couple of hosts with static address within the correct subnet. I tried with hardware address and client identifiers. no luck. my switch does not assign the IP address I assigned to the suitable mac address. to define it I use both CLI & Web.
ip dhcp pool host HP-Elliteaddress 10.10.11.7 255.255.255.0 client-identifier 01:d8:d3:85:cf:09:72client-name HP-Ellitedefault-router 10.10.11.1exit
ip dhcp pool host VAIO-Zaddress 10.10.14.108 255.255.255.0 hardware-address 54:53:ed:1c:a1:46
default-router 10.10.14.1exit
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Aug 23, 2011
A Windows Server 2008 r2 with 2 internet ports. One (IP: 10.0.96.132) connected to company intranet and one (192.168.10.1) as DHCP server connect to several PCs (192.168.10.**) through a switch.The problem is the PCs (192.168.10.**) can ping the DHCP server (192.168.10.1) , while DHCP server (192.168.10.1) can not ping (192.168.10.**).How to configure the server so that all these PCs can access the intranet?
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Dec 24, 2011
I have more than 10 PC om my Workgroup, using DHCP on network, but I have one PC alwaws got wrong IP (auto from dhcp), and can't connect even using static IP (status connect, but can't ping to gateway and other IP)Here "ipconfig /all" on one of PC that work. [code]
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Sep 9, 2012
My old modem from Roadrunner (Time Warner) died and the service man replaced it with a Arris TG852 modem/router. then my problems began. I would like to have the Arris modem act like a modem and not a router. The network governed by the DIR works fine but none of the clients can connect to the internet. Below are the steps I have tried.in both steps below, The DIR is connected to the Arris using the Ethernet not the Wan port.
1. I tried disabling DHCP on the Arris router and setting a static IP address for the DIR router. This worked for a bit and then quit. Some of the computers said there were duplicate IP addresses on the network. If fact the same IP address showed up in the DNS list of the Arris and the DIR routers.. even though the Arris router had DNS disabled.
2. After reading other forums. I enabled DHCP on the Arris and set it to passout IP address between 192.168.0.2 and 192.168.0.99. I then setup the DOR to pass out addresses between 192.168.0.100 and 192.168.0.200. then moved the DIR into the DMZ of the Arris. Still no access to the internet.
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Jul 8, 2011
I just bought an e4200. I was using a LinkSys WRT54GS running DD-WRT alternative firmware.
One feature that I really liked in DD-WRT was the ability to assign static IP leases from the DHCP server. I liked having all of my devices running with a predictable, known IP address on my network. I have a Home Theater PC, and various controller applications that run on iPhones, etc. - some pretty homebrewed. Configuring the firewalls, etc. was much easier with IP address based controls.
Is there a way to achieve the same within the e4200's stock firmware?
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Jan 10, 2013
I need another set of eyes on my config. I am trying to set up my router for a basic connection for the time being. I set my gig 0/0 port to dhcp I see traffic being sent and recieved but I can not ping 8.8.8.8. I am connected to a basic comcast modem from 0/0 I have also tried setting gig 0/0 to 100 full. I do have IP routing enabled. I believe I have my acl's configured correctly. I am wondering at this point if I need a static block of IP's from comcast.
hostname vpn-router-2901
username ****** password *****
enable secret *****
[Code].....
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Nov 11, 2011
I was trying to find if it's possible to add the option for static routes for DHCP clients on Cisco IOS DHCP config mode. I'm looking to add a settings as defined on RFC 3442, like this one, set on ISC DHCPd server:
Global settings:
option rfc3442-classless-static-routes code 121 = array of integer 8;
option ms-classless-static-routes code 249 = array of integer 8;
And for the subnet declaration:
option rfc3442-classless-static-routes 24, 192, 168, 30, 192, 168, 10, 1;
option ms-classless-static-routes 24, 192, 168, 30, 92, 168, 10, 1;
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Jun 22, 2011
I have enabled DHCP but want to set static table IP's for my security camera DVR and one computer, the others can remain dynamic. I know in other routers I can attach a LAN IP to a mac address to keep it static but I can't see where I can do that with this router.
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Dec 18, 2012
I'm following a tutorial that 'dumbs down' the modem and lets me use the router for everything.
It asks me to set up a static LAN IP (10.x.x.x range) and edit the DHCP pool of the router. When I'm logged in to the routers admin, it doesn't seem I'm able to do any of this.
Earlier in the tutorial it also asked me to set up a static IP for the router, which I did I suppose.
I've added a screenshot of the admin panel, in case that's relevant.
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Jan 28, 2013
I connects to the wireless box and has full signal but an exclamation mark is present.I have run some tests and the IPv4 and IPv6 say they have no internet access.I also run a full test and everything passed except the ping test which failed and it said: no response:default gateway response: dhcp server it suggested disabling security firewall but i'm not sure if that's the correct thing to do or even how to do that!
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Feb 22, 2011
"In the past I have noticed if I have one of my rigs running NAT and DHCP that my ping response times are lower compared to my router DGL-4300, when playing games. Is this due to the PC hardware being superior or is it a software/firmware thing?
Or is there a router out there that will perform better ping response time wise/ lag than my DGL-4300?"
Is this due to hardware or is it software/firmware? My NAT and DHCP box was a windows server 2003 configured with just those roles and my pings were in the 20-30 and I could host/join games no problem and no lag, but when I play through the Dlink DGL-4300 my pings would be 70-90 and some games I had lag issues and host/ join issues, sometimes it would work sometimes not.
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May 6, 2011
I have a PIX 515E that I want to use to as a border between my internet connection and my Cisco AIR1131AG. I have configured the PIX to have the outside interface as a dhcp client which gets its dynamic IP address from the cable modem. the AP is connected to the E1 inside interface. Now I could see the E1 interface from the arp table from the AP but I cannot ping it. From the firewall I don't see the ARP table from the firewall. and i cannot ping the AP. what is wrong with the configuration? side note, i am able to connect to the AIR1131AG from my laptop I was not able to retrieve an IP address.
FW1 - CONFIGURATION
interface Ethernet0 description uplink towards the techsavvy modem speed 100 nameif outside security-level 0 ip address dhcp setroute !interface Ethernet1 description >>> WIFI LAN ACCESS <<< nameif inside security-level 100 ip address 10.0.0.1 255.255.255.0
[Code].....
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