Cisco WAN :: 877 ADSL Router - DHCP Request Not Send
Jan 18, 2013
I'm trying to relace my isp modem by a cisco 877 adsl router..
The internet part is already done is working fine... however... there is also an seperate pvc for the voice part.
The pvc is working with the MER protocol... the thing now is... when i'm trying to get an ip address by dhcp on the sub atm interface nothing happen..
I did an debug dhcp detail and see that the router is first sending correctly an dhcp discover,the isp is replying to this with an dhcp offer i see my ip address,subnet mask and gateway addresses however.. the router isn't replying anymore with an dhcp request... so nothing happens anymore..
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Jun 27, 2011
Since i used this new modem ruoter, on facebook game Cafe WORLD i can't send requests or gifts to neighbors/friends. when the window pops out there's no friend list. it's just a blank space. also when i click the share button only a blank page pops out. i tried it in 3 different pc here @ home in different browser but still had no luck...i tried it on my bf's place and it works so i guess there's a prob with my connection. and sometimes i have the internet access but i couldn't navigate in any website only for chatting.
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Jun 18, 2012
i have ASA 5505 and have a ADSL modem (hwich has DHCP enabled) 192.168.1.X/24....i have static ip as well which is 34.X.X.X. i want to use ASA as a firewall and want to make site to site VPN..i tried to google it but i cant find any config.i have 4 swicth port in the ADSL modem so shd i connect my ASA with building switch but then it will have DHCP enabled if i disable DHCP on ADSL router then how will my ASA communicate.
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Jun 26, 2011
I have an ASA 5505 with software version 8.2(1). It is making DHCP requests for IPSec clients that connect to the ASA. The DHCP requests packets the ASA makes have an extra '00' appended to the hostname field, and the length field is the size of the hostname + 1. The DHCP server is Microsoft Server 2003 and this causes the hostname to be registered with an unknown character which appears as []hostname. Then when server 2003 tries to update the DNS record, it fails because of the invalid character in the hostname. Is there anyway to have the ASA have the correct length for the hostname field in the DHCP packet, or a workaround that will solve this problem?
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Oct 15, 2011
I have reinstalled windows 7 on my Toshiba laptop, I have my wireless set to automatically connect, I have excellent signal strength and have another pc connected to wireless router, but my laptop does not capture IP addresses. I tried renew command but got message unabl to contact your DHCP server, request timmed out.
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Mar 14, 2011
how do you set up an ethernet port for DHCP with a Belkin ADSl modem with wireless G router, model number F5D7632-4?
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Dec 14, 2011
We have a Cisco Aironet 1130AG Wireless AP (firmware 12.4) and have a guest wireless network (internet only) and corporate wireless network configured on it. They are kept separate by having different VLANs assigned to them. When a laptop connects to the guest network I see the DHCP request go out and it is tagged with the correct VLAN. The problem is when a laptop connects to the corporate network I see the DHCP request go out but there is no VLAN tagged on the packets. This causes a problem because both of our DHCP servers (on VLAN 1 and 3, remote DHCP servers no DHCP running on the Aironet [Doesn't seem like this version has a DHCP server]) are sending responses and sometimes the corporate user will get an IP address on the Guest subnet.
Our corporate network is setup on VLAN 1 which is configured as the Native VLAN on the Aironet. Will this cause the Aironet not to tag these packets with any VLAN information? Any other thoughts as to why it isn’t tagging these packets to a VLAN?
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Jul 3, 2011
I've been having problems connecting my laptop to the internet through wireless. When I plug it in with a cable it works fine. I also know my wireless works fine because i have other things attached to it. When I try to connect it says limited or no connectivity, but the signal strength is excellent. I have tried to repair the problem but it then tells me it cannot renew my ip address. I've also tried the ipconfig /release then renew, and thats when it says about my DHCP.
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Feb 22, 2013
Version 12.2(33)SXI
int vlan 1
description client vlan
ip vrf forwarding A
ip address 10.1.1.1 255.255.255.0
standby 129 ip 10.1.1.2
standby 129 timers 1 4
standby 129 priority 105
standby 129 preempt
ip helper-address 10.1.2.20
[code]....
dhcp requests are not making it to the dhcp server SAME VRF (ip helper-addres is not doing anything.....)extended vrf traceroutes on udp 67 sourced from vlan2 are fine
I am expecting udp unicast packets on port 67 "giaddr" relay packets on the DHCP server generated and sourced by the relay on Vlan1
eg. Mar 1 01:59:06.731: DHCPD: setting giaddr to 10.1.1.1
This exact setup works in our preprod environment with the same code.Only difference is we run Distributed etherchannel on the 6500's where this doesnt work.
Wireshark on the client I can see the requests being sent Going to check it with debug ip dhcp server to check the relay logs out of production hours.
I have seen so many people say it IS and ISN'T supported on this version of the code.e.g. [URL]
I am aware the helper-adddress should inherit the vrf of the interface ip helper-address vrf command is not supported.The fact it works in the PP environment.... could this be due to the Distributed EtherChanel difference? or just some bug....
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Jul 1, 2012
I'd like to know when the DHCP client will send DHCPInform (8)? And how can I force the client to send this type of message?
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Jun 23, 2011
My ISP waits a definite host name from me to return my white IP address via DHCP. Can I set this parameter in RV220W router? I don't find such parameter in IPv4 WAN configuration page.
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Mar 2, 2012
I've heard mixed things about the use of DHCP release messages. I've heard that some operating systems don't bother with them at all, which makes sense because many users disconnect the network media without shutting down the workstation. Which operating systems actually send out release messages as part of their shutdown sequence?
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Aug 24, 2012
i have a problem with my adsl line connected on a HWIC-ADSL on router 2901 it was working good until yesterday the atm interface is down but the interface dialer is up .i connected this line into home adsl modem and the line is working good?
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Apr 30, 2013
I'm using the cisco 837 router as my VPN server. I get connected using Cisco VPN Client Version 5. But when I ping the router ip, i get request timed out. Here is my configuration :
Building configuration...
Current configuration : 3704 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
[Code]...
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Aug 26, 2011
Replaced my DLink 655 (had stopped working) with the E4200. Every time I enter a new url, there is a 10 second delay while the 'sending request' message is showing at the bottom of the browser. When the website is connected, there is another 'waiting for xxx' delay for several seconds.I am on a Mac system (laptop and desktop).This never happened with the The delay occurs with wireless or with wired access. Happens with Chrome, Firefox, and Safari. Does not happen if I plug the desktop directly into my cable modem. I have Optimum Boost which is the fastest ISP in the area (possibly the country).I emptied the cache thinking it is DNS problem, works for a few minutes and then back to the same routine. I've tried every setting I know.
What's the use of paying for the fastest internet access and (supposedly) the fastest router if I have to wait 15 seconds each time I visit a website. Frustrating thing is that this sometimes, not always, even happens when I am going back to a page I just visited (back button on the browser).This has to be router issue since it does not happen when my laptop or desktop is plugged directly into the modem. This does not happen to me at work either. It does not happen when I use Cablevision's wireless network in Nassau county.
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Jun 29, 2012
I have a E2000 router/access point. I am able to connect 3 laptops, 1 smartphone and 1 printer wirelessly to the access point. All computers and smartphone can access the Internet. The problem is that none of the devices can connect with each other and thus cannot print. I can ping the router, no problem. Get "request timed out" message when trying to ping from one device to the other. Router firmware is 1.04
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Mar 29, 2012
I find E1200 cannot update its ARP information by received ARP Request which is sent by the wireless station connected to it, although E1200 has reply an correct ARP response to wireless station, and this will cause VoIP drop off when roaming from E1200 to another wireless AP which is bridge to it , so is there any way to enable the ARP request learning funtion of Linksys series?
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Apr 3, 2012
Have a client wanting to hand out public ip addresses to all clients from a PFSense Firewall terminating the internet connection.
How do I allow the Cisco Switches currently in place, configured with private ip addresses in the 10.10.x.x ranges and Vlans, where the main 3550 layer 3 has defined dhcp scopes for each vlan, to relay dhcp requests from all vlans to the PFSense firewall?
I assume I would take off the currently defined dhcp scopes for the vlans and configure each vlan/switch with the ip helper address and specify the PFSense firewall and that Nat would have to be disabled onthe firewall?
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Mar 12, 2012
One of my laptops is having a connection problem. I have 3 other laptops that can connect perfectly with my router, and normally there's only 1 laptop that is connected to my router. The laptop with the slow connection (takes 5 HOURS to load a website, sometimes will not even load), i re-installed the OS, and installed all the drivers needed, and it still wont work. it shows strong connection to me, and im sure the password for the router is right. below is the ipconfig/all information. Having this problem for 2+ weeks now!!! I think this problem started when i restored my router to factory setting, my router is Netgear WGR614v6.
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Feb 24, 2007
Can your wireless router do a ping test to 66.161.11.90 [URL] or any other [URL] for that matter?Mine can't, either with my wireless PB G4 running OS X 10.4 or wired Dell running Windows XP. I tried it with a wrt54g v5 & wrt54g v6 both tests got a 'request timed out' with 100% packet loss. v5 had the latest firmware, v6 is still at 1.00.9
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Oct 14, 2009
I'm about fed up with with having this issue that no one can seem to solve. It dates back to when I owned a WRT54G router. I started experiencing random disconnects with the router, both wired and wireless. I only owned the router a year and figured it was going bad.
So I purchased this WRT120N router late August. Soon after I set the router up, low and behold the same problem started. I've called my ISP a couple occasions and they tell me that everything is fine from their end. I've spoken with Linksys tech support on 3 seperate occasions. I have changed the MTU to 3 different values and upgraded the firmware. The 2nd support tech suggested that I do those two things. To my surprise this worked for 2 or 3 weeks with no problem. The same problem started again just last night disconnecting intermittingly. I spoke with another support tech and they suggested that disable the SPI Firewall protection and Anonymous internet request. That did not work for the brief time I had this disabled.
More into the problem, when it disconnects the modem seems fine but the activity light on it stops as it should. The router itself appears to reboot, then when it comes back up the connection restores. What could possibly cause this? I currently have version 1.0.02.This is getting very frustrating and I am getting very near not using Linksys/Cisco products any longer.
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Apr 23, 2012
At random times, my internet will "drop" connection and will not download any packets, but I am still able to send packets. My Local Area Connection icon continues to say I am connected, my modem is fully functional, and my cables are good. I can get my internet back up and running for 10 minutes or so by disable and re-enabling my Network Connection. If I simply try the "repair", it gives me an error at the "Refreshing IP" step.I have done a full system scan for viruses and I am clean. My drivers are fully updated, I have disabled my firewalls, and still no luck. During the times when it is down, I can successfully ping my modem through CMD, but I get the time-out error if I ping a site, my default gateway, the DHCP Server, or the DMS Servers.I have made no changes to any major settings on my computer, nor has there been any recent additions/removals of any software.
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Jun 8, 2012
How to send movies from pc to tv with wireless router
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Feb 27, 2012
I have an old White BT router (from the UK)
Also a 60m ethernet cable. It won't send a signal far enough to be picked up by an ethernet port on another computer at that distance via cable.
However, a modern Zyxel Router will chuck it through that length of cable OK
way to get the BT router (v1 or 1.5) to do this ?
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Feb 27, 2012
I have an old White BT router (from the UK)
Also a 60m ethernet cable. It won't send a signal far enough to be picked up by an ethernet port on another computer at that distance via cable.
However, a modern Zyxel Router will chuck it through that length of cable OK
is there a way to get the BT router (v1 or 1.5) to do this ?
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Apr 19, 2011
Can I use my d-link wireless router to send movies to my hd tv?
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Mar 22, 2013
i was trying to see each step taking in arp process in simulation mode of packet tracer using hostA,SW1,R1,SW2, hostB diagram.
In simulation mode , everything was flowing nicely till R1's arp resolves hostB's mac address. Then suddenly hostA starts sending icmp packet.
2 question; i thought hostA already sent the icmp to R1 once resolving R1's mac. What happened the icmp packet R1 received.why R1 didnt send the icmp to hostB after resolving hostB's mac.
2.nd question; after R1'arp resolves hostB mac, what triggers hostA send icmp packet cause in simulation mode there is no any signalling to hostA from R1 to do that.
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Oct 11, 2011
Does RV110W-A-NA-K9 router have a utility to send magic packets to PCs on the LAN?
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Apr 4, 2012
i'm currently doing task in this packet tracer, i've already completed 100% but i noticed that there are certain router cant send packet to the main router,i think the best way is to add default route, and i already add default route but it doesnt come out on the routing table,problem : HQ router cant send packet to ISP router?
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Mar 14, 2013
just upgraded to a Linksys EA4500 wireless router at my small office from an old Netgear. My email now wont send messages out on either my IPhone or my laptop(Toshiba) while using the wireless network. If I turn off Wi-Fi on my IPhone, my email immediately sends the messages. What settings do I need to change? I have Comcast internet and one IMAP email account and one "Yahoo" email account
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Mar 14, 2013
just upgraded to a Linksys EA4500 wireless router at my small office from an old Netgear. My email now wont send messages out on either my IPhone or my laptop(Toshiba) while using the wireless network. If I turn off Wi-Fi on my IPhone, my email immediately sends the messages. What settings do I need to change? I have Comcast internet and one IMAP email account and one "Yahoo" email account
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Mar 7, 2012
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Feb 20, 2012
My Linksys router is connected to my desktop and modem and gets internet access but for some reason has stopped sending the wireless signal to other laptops in the house.
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