WRT54G WAN DHCP issue

my WRT54G was working fine but from last last 8 days
i am using my router on a cable with a dhcp server
but from the last 8 days it is not accuring DHCP
in the status the ip is 0.0.0.0
but if i plug the same cable on my system it works fine but on router there is problem. i have also cloned my systems MAC address on router, reset the router, checked the cables but ended up with nothing
the private lan of router is working fine i connect my notebook and PC with and it all works fine but the router does not accuire an ip address from the cable

Hardwire your computer to the modem and check if it's online. If it is, isolate your computer and your router. Hard reset the router for 30 seconds then powercycled for 30 seconds. Access the router's setup page, configure the wireless settings first. Then under the security tab, uncheck the block anonymous internet/wan requests. Then clone the MAC Address, and lastly, change your router's local IP Address to 10.10.10.1 and save the settings. It will show up as page cannot be displayed OR asks you to release/renew your ip. Power-off your modem and router. Connect the modem to the router's internet port. Boot up the modem first and wait for the cable-link/online/cable light to go steady. Then power on your router, wait for 30 seconds and then access your router's setup page using the 10.10.10.1 number and check for the status. You should have an IP address now.
IF all these fail, upgrade your router's firmware first then repeat the above process. Make sure to hard reset your router after upgrading the firmware.

Similar Messages

WRT54GX WAN DHCP Problems?!

Folks,
I seem to be having a new problem all of a sudden. The WAN DHCP client on my WRT54GX has almost completely stopped working. All WAN IP addresses are all zeroes, and hitting Renew in the configuration program doesn't help.
At one point I unplugged everything, brought up the cable modem, waited until it connected, and then brought up the router, and that worked. But then I had to reset the router due to a wireless configuration change, and after that the WAN DHCP client failed again, and I haven't been able to get it working since, even though I've restored the factory settings and power-cycled the device multiple times.
I tried replacing my router with a compatible substitute (WRT54GX2), and although that worked initially, it soon started suffering from the same issue.
The strange thing is that if I plug my PC directly into the cable modem, everything works just fine. I can use the ipconfig utility to release and renew repeatedly without any issues whatsoever. It's as if something Comcast has changed about their DHCP service confuses the router's DHCP client but not the one on my PC.
Can anyone tell me what's going on?

hi...try this out....from a hardwired PC , get into the router setup page....here there is a sub-tab called MAC address clone....hit that.....enable and "clone" or "clone your PC's MAC" ....save settings...once done ...do an ipconfig/all and verify that the "physical address" and the MAC address that u just cloned are the same....then go to the status page and do a DHCP release/renew and check if u get a WAN IP.

Wierd DHCP Issue

Hello All,
I facing a very wierd DHCP issue and would like to know your thoughts on it.
I have my wired clients on vlan 1 and wireless cleints(eap-peap) on VLAN 2.
We are facing an issue where multiple wired clients who were on access port vlan 1 are receiving IP address from wireless subnet(vlan2) -their DHCP server was the WLC virtual gateway IP address(1.1.1.1). This is causing an outage to few wired clients.
The WLC trunk does not have vlan 1 allowed on its ports and all APs are in local mode and all on access vlan.
I'm not entirely sure whats causing this, but only way I think this is possible is that 'A Client' laptop has his network connections bridged - his wired nic on VLAN 1 and wireless NIC on vlan 2, acting like a WGB, which is causing new wired clients(vlan1) DHCP broadcast request forwared through the bidge mode laptop to AP--> WLC. Do you think this is possible??
Havent been able to identify which client is causing this issue yet.
Has anyone faced a similar issue and anyway to block this through WLC/ACS policy?
Thanks
Jino

Hi,
Might we consider to make use of network monitor to take a look at the traffics for the 1.1.1.1 address?
How to use Network Monitor to capture network traffic
Download link here:
Microsoft Network Monitor 3.4
Best regards
Michael Shao
TechNet Community Support

RVS4000 won't get WAN DHCP address

I just tried replacing a cheap domestic router/switch with an RVS4000 V2 on our work network. This has a WAN connection to a cable modem for internet access via a dynamic IP address.
When I first connected the RVS4000 it got a WAN ip address via DHCP of 192.168.100.11. This is the type of IP address we get when there is an upstream problem with our ISPs cable network, and sure enough we had no internet access. The RVS4000 was set to use DHCP on the WAN interface. So I logged a support call with our ISP but they said there were no problems at their end.
I then swapped the RVS4000 out for the original router. This worked fine and got a WAN DHCP address of 77.xxx.yyy.zzz as it should. Swapped back to the RVS4000 and back to the same problem of getting a 192.168... address.
So, I downloaded the latest firmware from Cisco, which was V2.0.3.2 and flashed the RVS4000.
I then tried again connecting the RVS4000 to the cable modem but this time it would not get any WAN DHCP address at all. On the Status/Gateway page of the web interface it said that the WAN interface was down. However, on the front panel there was a yellow light indicating a live connection on the internet port.
Any suggestions? I am assuming there must be a fault, but thought I would check for advice before sending it back.

Hi Nick,
Connect your computer directly to the modem, obtain the right IP address. Then put the RVS4000 back to the modem connection. Go to the set up, MAC ADDRESS CLONE, Enable this feature then use the option "clone my pc mac".
Then wait 1-2 minutes and refresh the WAN.
Basically this feature puts your computer's MAC on the router WAN interface. You can also use the previous router's WAN MAC if you know it and want to manually type it in.
-Tom

Very weird dhcp issue

We've started 're-vlanning' our main location here, breaking up depts
into their own vlans.
All seems ok so far, aside from a real doozy.
For the IT vlan, we have one address that will not talk to our web
content mgmt appliance. It's the 2nd address in our assignable pool,
and it doesn't matter if it's dhcp or statically assigned, that address
will not talk to that device.
That is the *only* device that cannot be reached from this particular
address in our dept vlan, every other one works fine.
Any ideas on this?
Stevo

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> and it doesn't matter if it's dhcp or statically assigned, that
> address
So.... the title of this thread should actually be 'Very weird non-DHCP
issue', since your own testing confirms this has nothing to do with DHCP?
If you do a LAN trace on this machine as well as your web content
management appliance do you see packets on either side? Both sides? If
not on both sides but you do on the source (workstation) side see
packets going out, then get LAN traces after each network device
(switch, router, firewall, etc.) to see when the packets disappear.
Feel free to post the LAN traces somewhere with descriptions of IPs,
ports, and what you should be seeing, if you want to post them somewhere
for review.
Good luck.
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6500 DHCP ISSUE

Hello All,
I am having an issue do DHCP from the 6500, and was hoping someone cant help. So, I tried to setup DHCP from the FWSM to the clients and this worked fine with giving out the IP, however the gateway for devices on the inside is supposed to be the 6500, not the FWSM, which is why the clinets wouldn't get out to the internet. Do I need to set up DHCP relay on the FWSM or does anyone know the way I can setup DHCP on the 6500 to give out IP's to the clients. Again just to reiterate, when I setup DHCP on the FWSM the clinets get the IP's but do not get out to the internet and when I setup DHCP on the 6500 the clients do not get an IP. Also I know tghis is a dhcp issue becasue when I assign a static address on the network the clients get out fine. Thanks in advance for the help!
6500 Config
ip dhcp pool TEST
   network 1.1.1.0 255.255.255.0
   default-router 1.1.1.1
   dns-server x.x.x.x y.y.y.y
FWSM Config
FWSM/TEST# show run
interface Vlan3
nameif outside9
bridge-group 1
security-level 0
interface Vlan203
nameif inside9
bridge-group 1
security-level 100
interface BVI1
ip address 1.1.1.4 255.255.255.0
passwd 2KFQnbNIdI.2KYOU encrypted
access-list INSIDE1_IN extended permit ip any any
global (outside1) 1 x.x.x.x
nat (inside1) 1 1.1.1.0 255.255.255.0
access-group INSIDE1_IN in interface inside1
route outside1 0.0.0.0 0.0.0.0 1.1.1.1 1
FWSM/TEST#

Hello Alain,
Thanks for your quick response. I attached a Diagram of the layout. Just to let you know this is an FWSM with many virtual contexts and most including this one that are Transparent. I understand that I need an access-list on both ends to specifiy so the FWSM opens it, I am just having issue because the FWSM sees this as unsual traffic and the access-list needs to be on-point to work. Thank you for the response and I'll look forward to hearing back from you.

VRF and DHCP issue

VRF and DHCP issue
We have a 6500 ( 12.2 (33) SXH5 ) that has a VRF running for our guest network. On this 6500 resides the DHCP pool with a range defined for our guest network. We have a stack of 3750's (12.2 (46) SE) connected to the 6500 with a L3 connection. The 3750's have a local guest VLAN with its gateway defined in a VLAN interface. This VLAN on the 3750 has an IP helper address pointing to an IP within the VRF on the 6500. When debugging DHCP on the 6500, a request is received and sent back out. The client never receives this request.
If a static IP is applied, the client is able to communicate anywhere within the VRF successfully (including pinging the IP within the helper-address. As many posts have pointed out - there is no VRF <name> under the ip dhcp pool <name> within the 6500. I am just wondering if anyone else has run into this and what their solution was.
Thanks.

Hi,
I have tested the dhcp server and vrf on Cisco 3640 and it is working without VRF under the ip dhcp pool. Please ensure that you have configured routing for the dhcp-relay agent(VLAN facing dhcp client on 3750 in your case).

WRT54G v7 WAN DHCP client problem

I've recently started having a strange problem with my WRT54G. Internet access is via a Cable modem and has been working fine for months, and the cable modem works fine so I suspect the problem is with the router. However the router is also working, mostly, so I figured I'd see if anyone here has any suggestions. Here are the details of the problem:
The router WAN configuration was set to DHCP.
It used to happily pick up a new IP address from the cable modem whenever necessary.
One night the router stopped picking up an IP on the WAN side. (nothing was changed. I'm the only one in the house who goes anywhere near the router)
Connecting the modem directly to a PC works fine (suggesting the modem's DHCP server is fine).
Copying the WAN IP config from the PC to the router, as a Static IP, also allows it to work when the modem is plugged back into the router and the router to a PC (which is how it's setup now, but it's a pain to have to mess with the physical connections and manually reconfigure the router every time the modem drops a connection (which is another issue, but not one for this forum...)).
So both the modem and the router seem to work except for the router's DHCP client. It works fine as a DHCP server for the LAN.
The firmware was already upgraded (and working), I've followed the standard power-cycle procedure, I've released and renewed the IP via the Status tab in the web interface, and I've tried resetting the router using both the button on the unit and via the web interface to revert to factory defaults.
Any suggestions?
Solved!
Go to Solution.

I also had this problem which occurred after >2 years of the router working fine. After changing MTU to 1300, cloning the PC MAC address, and power cycling the router and modem fixed the problem. But I was curious to see which change did the trick, so I changed both back to the default (MTU = auto and not cloning the MAC address) and it worked fine! I think the router problem is intermittant and may appear to be fixed by changing setting, but I fully expect it to reoccur.

DHCP issues on wireless

When I connect to my wireless router (D-Link WBR-2310 I believe) using my mac, it gets the default self-assigned address instead of DHCP-assigned address. My PC connects fine wirelessly and wired over ethernet. If the router is reset, it works fine. If I assign manual address to iBook wireless, it works fine (by "works fine" I mean that I can connect to the internet).
Had similar problem with my old Linksys router (Linksys WRT54G) where the following devices had issues connecting to the internet iPod Touch, iBook, PowerBook, and MacBook. This was under unsecured, WEP and WPA settings.It seems that the issue is resurfacing with my current router.
Currently, I am using WPA security (I don't like WEP and neither does my PC). I would rather not switch security settings to unsecured due to the close proximity of my neighbours (yes it's canadian spelling!).
Any suggestions?

I have encountered this same router and issue visiting my future in-laws for the holidays. DHCP with manual address appears to work, but I also still encounter occasional drops. The router is setup for WPA2 security, and support a mix of Mac and Win clients. I haven't put a lot of time into trying to fix it, but here is what I know so far:
1) Sometimes it does just work with DHCP
2) DHCP with manual address works, but will still drop occasionally for brief periods
3) Sometimes, just turning the airport off then on again will resolve the issue and pull an address
4) Just waiting about 30-60 seconds also seems to work -- usually
5) Plugging into the wire works great!
I haven't sat by the router and worked on this, but it seems that occasionally the router just drops the signal, and with it the DHCP assignments. Something about the DHCP implementation is very slow, and it just take a while to get around to assigning an address to my machine. I haven't looked into firmware updates since it's not my box and I don't want to mess it up further and then leave, but that's certainly something to check into.
We also have an 12" PB that cannot even connect to the wireless with the "Error joining wireless network" message. Haven't been able to figure that one out at all.
They may just be getting an Airport or Linksys as a late x-mas gift here... (as my connection drops again while I type this! Airport off, airport on, wait 30 sec, and we're back)
Cheers, and good luck!

WRT54G2 V1 Fails to get WAN DHCP address

Hi All,
I have a new WRT54G2 V1 that works fine, with the exception it will not pickup a DHCP address from the cable modem. I have gone through the standard steps assuring the modems, cables and computers work on other setups and have no issues there.
The wireless and hub portions of the G2 work as usual. I flashed the firmware to the latest FW_WRT54G2V1_1.0.04.005_US and there is no change in operation, also the G2 responds correctly to a full reset to factory settings.
On the router's reboot the WAN light comes on briefly (assume self-test), but remains off after the router is fully booted.
Have I forgotten something obvious, or is this an out-of-the-box failure ?
Cheers,

Once more step which you can try is, connect the Ethernet cable to the LAN Port 1 and the other end of that cable to the Internet Port of the Router and then check if the WAN light on your Router lids or not...
If it still doesn't lid, then i think it might be the problem with the Router itself, and you need to replace your Router.

WRT54G LAN gaming issue

We have a WRT54G v8. We are having trouble connecting Star Wars Galactic Battlegrounds multiplayer games. Both computers are connected to LAN ports. Both computers can ping each other and browse each other's shares. In the game, each computer can see a game put up by the other computer. But when trying to connect to the game, it times out and fails. This happens whether we use DHCP from the router or static IPs. If we connect the PCs by cat5e crossover cable and change nothing else the game connects and works fine. It therefor seems obvious that the router is blocking something. I thought that the firewall settings, port forwarding, and port triggering only affected WAN to LAN traffic. I thought that all traffic was passed unfiltered LAN port to LAN port as if using a hub, but it seems to not be true. I have turned off UPNP and played with the 4 firewall checkboxes - still having the problem. The game uses TCP Ports 2300-2400,6073 and UDP Ports 2300-2400,6073,47624. We recently upgraded from a BEFW11S4 v3.2 which worked fine for this game. Can anyone tell me what is being blocked and why? Can anyone tell me how to make this work just like a hub with respect to LAN port to LAN port? Also buying a hub and connecting it to the router is only slightly helpful since we also would like to do this using the wireless built in to the router.

Enable the UPnP and reduce MTU to 1458 and check whether it works or not and let me know…

RV042 second DHCP issue

Hy all,
I have a CISCO RV042 in a network with 2 subnets 192.168.1.x and 192.168.2.x and I want multiple DHCP on both subnets. How can I do that?
If I use a second router for the second subnet (192.168.2.x) to use its DHCP. The bandwith management will work? Do I need port VLANs?
The network is like this:
The RV042 is the main router thru it we acces the internet, it also suplies DHCP 192.168.1.x, I enabled multiple subnet for 192.168.2.x.
The reason I want 2 subnets is beacause I have 2 acces points for wireless clients and I want to use rate control on WAN with bandwith management from RV042 too give wired clients more bandwith than wireless clients.
I know that RV042 doesn't supply multiple dhcp like RV180,but I needed dual WAN.
Thank You

Hi,
Thank you for the answer, but my issue remains, below I tried to write a little bit more
If I make the configuration like this:
On CISCO RV042:
Port based VLANs:
VLAN 1 on LAN 1
VLAN 2 on LAN 2
On AT-FS750/24 switch:
Port-based VLANs:
VLAN 1 for 2,3,4 ports where 2,3 are the AP's (TL-WA901ND) and 4 uplink to RV042
VLAN 2 for the rest, let's say 5,6,7,8,9, etc ports that are for wired clients.
Tagged-based (802.1q):
VLAN ID 11 for 2,3,4 ports where 2,3 ports are tagged are the AP's (TL-WA901ND) and 4 untagged uplink to RV042.
VLAN ID 22 for 2,3,4 ports where 2,3 ports are tagged are the AP's (TL-WA901ND) and 4 untagged uplink to RV042.
On AP's (TL-WA901ND):
Multi-SSID with tagged based VLAN:
SSID 1 on VLAN ID 11
SSID 2 on VLAN ID 22
If I use the second router (not supporting VLANs) only for DHCP for the wired clients with the configuration:
-In the WAN I'll plug RV042 LAN 2 (VLAN 2) and from its LAN 1 I'll connect LAN 5 (VLAN 2) in the switch.
second router WAN:
IP:    192.168.2.2
SM:   255.255.255.0
DG:   192.168.2.1
DNS: 192.168.2.1
For DHCP
LAN1:
IP:   192.168.3.3
SM: 255.255.255.0
It will work to split wireless from wired ?
How can I split the 2 wireless networks in guests and business more efficient?
Let's say the wireless clients from "SSID 1" have to have a guaranteed bandwidth.!
How can I set it up so the wireless clients gets different IP class on the 2 wireless networks?
Can I use the rate control from RV042 on the IP (192.168.2.2) of the second router?
My problem is that I need all the subnet available from RV042 DHCP for the wireless clients (192.168.1.x), because RV042 can route only in class C (254).
I configured the static IP's in 192.168.2.x subnet for Ethernet equipments, I used multiple subnets from RV042.
Momentarily I use COS from the switch for the tagged VLAN to prioritize the traffic, but this is no longer an option for me.
Can a CISCO RV180 make a difference in this configuration?
Thank you,
Dragos

Request for best connectivity Setup for WRT 1900ac. DHCP issue

Hello Customer Care Team.
I imported the WRT 1900ac router from the USA to my location in India. Apparently your Customer care in Indai don’t give any support for this fantastic router.
I am not at your mercy for assistance.
Please help & guide me in getting the best out of it and with a good setup.
MY ADSL+2 Modem Router : Netgear
Internet connectivity as follows:
Lan IP
192.168.1.1, subnet : 255.255.255.0
Dhcp server On : start: 192.168.1.2 End : 192.168.1.254
Wan IP Setup
PP0E LLC/SNAP NAT on
Wan Ip auto assigned
MTU: 1492
My Linksys wrt1900ac wireless is setup as follows for 2.4ghz & 5ghz
2.4 ghz 5ghz
Network mode mixed mixed
Security mode wPA2 WPA2
Channel width auto auto
Channel auto auto
Besides above WRT 1900ac has:
1. NAT enabled
2.Local network DHCP enabled as :
DHCP server enabled
Start IP: 10.185.21.100 end: 10.185.21.199
IP 10.185.21.X Range
3. Internet setting on WRT 1900ac as:
IPv4 Auto DHCP Configuration MTU Auto
I want you to tell me if my Linksys WRT 1900ac is configured correctly and the DHCP server IPs are correct.
When I enter 192.168.1.1 in the browser it takes me to my netgear modem web setup page. So How do I get to make all the modem & the wifi in the range of 192.168.1.1 etc.
Please help & provide your best solution for fast speed .
Thanks
Solved!
Go to Solution.

Sorry you didn't get an answer faster but you have to know this is a peer to peer forum. it is users helping other users so not always the quickest way. First off, can you change your ISP router to modem only mode? It is best that way as you will get conflicts such as what you are seeing when there are two routers in the same link. You are getting the ISP router when you enter 192.168.1.1 because that is its address on the LAN side. It appears that your router is getting set to a 10.x IP because of the setup. You have two routers trying to work with DHCP so that is also an issue. If you can change the ISP router to modem only mode then once it is up disconnect it from the router and do a factory reset on your router and make sure it has the IP of 192.168.1.1 and you will then be able to make any changes you need to. the default login is password of admin and leave the user blank.

No WAN DHCP log on E3200?

Hi
I used to have a Belkin router which was losing connectivity throughout the day for a few short moments. After looking at the logs it appears it was issueing a DHCP release randomy which explained the fault. Since it was old router I decided to replace it with a E3200.
This worked fine for a few days but then I started to see similar symptions. So currently I am trying to figure out if it's the same issue as before. I tried looking for a log on the router to see if it was also losing/releasing the WAN IP, but apparently the router doesn't log it.
I spoke to a tech rep on chat, but I don't think they understand what I was talking about (how frustrating). I even tried to explain it another way that if I hit the 'Release IP address' button and then hit the "Renew IP Adresss' button does this activity get logged.
Where can I find a log to see DHCP activity (on the WAN interface)? There is a DHCP log which shows all the LAN activity but this is not what I need for this issue. I find it hard to believe a mature vendor like Linksys doesn't log this activity?
Thanks for any input!

Interesting...I wonder why they provide the DHCP logs for the local lan. I would have thought if someone is skilled enough to be able to utilize these logs then they would be skilled enough to read any logs for the WAN port...oh well. I guess time to return and get a different brand.
Thanks for your input....

Extending Wireless Network - DHCP Issues

I have an Airport Extreme 802.11n and I want to extend the range of it with my Airport Express 802.11n. I found the "Designing Airport Networks Using Airport Utility" from the Apple support page. "Extending the Range of an 802.11n Network" on page 46 says to manually set up. Under "wireless" when I check the box to "Allow this network to be extended" I get a dialog box that says, Correct the 2 problems below before updating this Apple device. Those problems are DHCP Beginning Address 10.0.1.2 and DHCP Ending Address 10.0.1.200. The Airport Extreme has the IP Address of 10.0.1.33. It says the DHCP range you have entered conflicts with the WAN IP address of your wireless device. If I limit the beginning address to start at 10.0.1.34 should that solve my issue? Any help is appreciated.
Thank You!

Sorry but I should have read your original post closer.
Since you already have a router distributing IP addresses, you don't need the AEBS doing that. Configure your AEBS so that it is acting as a bridge (not sharing a single IP address).

WRT54G WAN DHCP issue

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