Cisco Wireless :: 871W Unable To Ping / Contact Another User On Same Subnet
Jul 28, 2012
I have an 871 set up at home with 2 VLANs, both of these vlans present a strange behavior where an user is unable to ping/contact another user on the same subnet, however if users are on different subnet it seems to work [code]
According to the troubleshooting that I have done, the issue seems to be with the broadcast traffic, ARP request/reply do not reach another host on the same subnet (wireless to wireless or wired to wireless) however if the wireless device iniciates the connection to wired, it works fine.
I have tried to enable proxy arp on the different VLANs and BVI and different combinations but no sucess in order to get traffic across 2 wireless devices on the same subnet or a connection that is iniciated for a wired client to a wireless one.
I tried enabling and disabling dot11 arp-cache but no luck.
I have an issue with the device in subject. I need that some server, listed as service on CSS, can contact a content VIP on the same subnet. To allow that traffic I configured grouping on CSS (group 1) with vip address and an ACL that allow traffic from subnet 10.1.1.0/24 toward same subnet 10.1.1.0/24 and I have bound this ACL with sourcegroup 1. The nat and portmap works but never at first attempt, instead since second attempts it works. Seem like a CSS require to much time to create nat entry.
I have a cisco 871w router that I'm trying to incorporate into an existing network. I have FastEthernet4 (WAN port) plugged into an ISP device, which I don't have access to. I have the address set to use dhcp, which is successfully recognized and I see that the interface gets a valid ip address that I can ping with other computers on the same network.
Problems: I am logged into the router via the serial port and I cannot ping websites on the internet. I am able to ping sites that are hosted inside the WAN, but when I try "google.com" for instance, I see it sending out packets, but none are received. It resolves the hostname from the local DNS server, but there are no packets received.
I type into the console to set up the router. I'm missing a lot of stuff. This is what I've been able to piece together using google and the software manuals:
enable config t hostname [hostname] interface FastEthernet 4
I am new to Cisco and am studying for my CCENT certification. At the moment, I am attempting to correctly configure a Cisco 871W lab router. Since I have undertaken this task, I have run into nothing but problems. First off it was finding that the previous owner had left a password on it, having to purchase a new USB to DB9 adapter to pass the "break" sequence to the router, and then resetting the router in ROM Monitor mode.
Now, I cannot seem to configure the router correctly, and am quite stumped.
My ISP is Charter (cable internet), and the home network that I am using consists of a Motorola SBV5122 Digital Voice Modem, Motorola SB6120 Cable modem, and, ideally, should also include my Cisco 871W router.
When I connect my router to the SB6120 Cable modem, the router receives an IP address via DHCP and the WAN indicator light turns on.
I have a VLAN configured on the 4 switchports of the router, and it is setep to act as a DHCP server. However, when I connect my PC to rhe router via Cat5e Crossover cable, I cannot access the internet. The router gives the PC an IP address, yet all attempts to ping the PC from the router fail. Somehow, I can connect to the router via SSH though.
Furthermore, I can ping the 127.0.0.1 loopback address from my PC, but cannot do so from the router.
how to correctly configure this router to function as intended in my network situation, however, this is proving to be seemingly unsurmountable!
I have attached the config of my router along with both outputs and commands relating to my predicament.
We have a Cisco 871W working as PIX, controlling external VPN connections to our private network.The configuration is very similar to the one described here - "Cisco Router as a Remote VPN Server using SDM Configuration Example" url...
About once a week, it stops working, without aparent external intervention.The ping to the external IP stops answering, and the internal IP stops answering pings also.The solution is power-off and power-on, and it starts working again ...
What is the correct way to debug this situation ?I can connect a HyperTerminal using direct cable to the 871, but dont know the relevant commands to debug this situation.
Is there any LOG I can have a look into ? Yes, I am quite new to Cisco world .By the way : "show version" says Cisco IOS Software, C870 Software (C870-ADVSECURITYK9-M), Version 12.4(15)T7, RELEASE SOFTWARE (fc3)
Started this morning woke up checked my phone no wifi hmm weird checked my hp tpuchsmart connected but jo internet access checked my router(netgear wireless N 300) made sure my modem and all wires are connectedNext went to my router ip 192.168.1.1 after reading some forrums i thought maybe if i changed the ip or sum i would have worked i know dumb though.. any way i believe i disabled my dhcp.. and one of the ip ad on the same page to 192.168.1.3 thats when it got worst i tried ipconfig/release saysNo operation can be performed on bluetooth network connection 2 while it has media disconnected.No operation can be performed on local area connection while it has its media disconnected(Its a wireless connection from my touchsmart to my router) I have tried goin back to the routers page but i can no longer find itI have also tried ipconfig/renew but i get this...No operation can be performed on bluetooth network connection 2 while it has its media disconnectdAn error occured while renewing interface wireless network connection : unable to contact your dhcp server. Request has timed out.No opration can be performed on local area connection while it has its media disconnected
I am able to ping from Switch to firewall inside ip and user desktop ip but unable to ping from user desktop to FW Inside ip.. config is below for both switch and FW Cisco ASA5510....
TechCore-SW#ping 172.22.15.10 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.22.15.10, timeout is 2 seconds:
I have a rather specific and annoying problem with my router. every few days or so the internet will cut out. However, i am still able to use websites that i have been using already, so am able to check emails read articles etc, but am unable to do things like stream videos from youtube or play online games. I run network diagnostics (Windows 7) and receive the error: Your computer appears to be correctly configured, but the device or resource (samsung.msn.com) is not responding. I have already updated all my drivers and have completely reinstalled my router and checked all cables etc. This appears to be only to do with computers that are connected wirelessly, as the pc connected via ethernet seems to be unaffected,
I have both a netbook and a gaming pc connected wirelessly. Netbook: OS Version: Microsoft Windows 7 Starter, Service Pack 1, 32 bit Processor: Intel(R) Atom(TM) CPU N550 @ 1.50GHz, x64 Family 6 Model 28 Stepping 10
Below is my VPN config in my 871 and radius user config. I am unable to connect to the vpn using Cisco vpn client. I am getting one of two errors depending on what config changes I make.I believe I have the radius configured correctly because it is authentication but not 100% sure.
I've been trying (in vain) to connect a USB Wireless device to be able to use it off my wireless network. I have (2) other laptops and (1) other desktop connecting to the router with no issues. For some reason, this old desktop keeps installing an Ethernet device (probably on the MB) and is automatically Configuring the IP address to that instead of the USB wireless device.I've tried uninstalling the Ethernet device but it comes right back after I do a reboot. Even when I disable it, I still can not connect with my Wireless device.
need to know why I can not connect to the internet after I am done downloading windows Xp on my Desk top. I got an error message from the cmd, saying that computer is unable to contact DHCP server.
I'm unable to maintain a connection with an FTP host outside my network through my Cisco 871W Wireless/Wired router. I am able to establish a connection with the external FTP server, but when I attempt to transmit files I get repeated disconnections and failures.
The software running on the device is IOS C870-ADVSECURITYK9-M, Version 12.3(8)YI2 RELEASE SOFTWARE (fc1) Synched to technology version 12.3(10.3)T2 System Bootstrap Version 12.3(8r)YI
I know it has to be somewhere in the configuration, but SDM no longer operates and I'm not entirely familiar with the IOS command set. When I remove the Cisco device and plug my computer directly into my ISP network, I am able to send files via FTP with no problems.
I just moved to Auckland, NZ from the USA to go to school at the university here, and am having a problem connecting to the internet in the university residence hall in which I am living.Wifi is not available in the residence halls, so we need to use an Ethernet cable. When I plug in my computer, the network adapter icon says Identifying for a while then settles on Unidentified Network with no internet access, the IP is 169.x.x.x.When I try to release and renew the IP, it says unable to contact your DHCP server, request has timed out".I've tried multiple Ethernet cables, both brand new.I tried connecting to a port in a friend's room in the same building, and even in a classroom on campus, and both had the same result.Naturally after all that I assumed my NIC somehow died overnight while I traveled here, so I went to a computer repair shop expecting to have some hardware replaced, but we plugged it in there and it worked immediately so they weren't sure what to tell me.
I've gone through pages of old threads at this forum and others like it, trying solutions but having no luck.I've power cycled my computer, obviously I can't power cycle the whole network as it's for 200 people, but the IT people here have tried resetting it for me on their end as best they can. [code]
I have a Dell 570 Inspiron desktop running win7 home premium w/ a 64 bit OS. I have Frontier dsl with a Westell 327W modem and a netgear router. Two desktops are connected to the internet...one through the modem and the Dell 570 through the router. I also run laptops through the router w/no problem. This morning the dsl went down, and when it came back up, the Dell 570 would not connect. i tried Diagnosing Connection Problems, and I'm told to turn off the modem/router (which I have done a gazillion times).When I look at Network Connections in the Control Panel, It tells me I have an unidentified network and can't connect. I read through some forums earlier, and found that releasing and renewing ipconfig often corrects the problem, and that's when I got the message that 'An error occurred while nenewing. Local Area Connection unable to contact DHCP server.' This set up has worked for the past year and a half. I looked at the network adapter, and it says it's working properly. I changed the cables going to the machines, and they both work on this computer. The only change made to the computer was to install McAfee security center through AOL yesterday, but the set up worked all yesterday and last night.
Until a couple of days ago I was able to connect to the internet wirelessly on both my laptop as well as my desktop. However, that has changed for the desktop, now I am unable to access the internet on it. It says that it can detect the signal. When I tried to renew the ip it responded with "An error occurred while renewing interface Wireless Network Connection : unable to contact your DHCP server. Request has timed out." [code]
I randomly lost Internet connection, and since have not been able to Renew an IP address! Other people in my household can connect just fine. I've tried numerous things to get my internet back, but continue to be unsuccessful in doing so.
Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1985-2001 Microsoft Corp. C:Documents and SettingsMike>ipconfig /all Windows IP Configuration Host Name . . . . . . . . . . . . : miker Primary Dns Suffix . . . . . . . :
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.
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.
I have a Gateway 818gm desktop pc and the wifi stopped working after I reformated the hard drive. I can not figure out where the wifi card is in this PC.
I can connect directly to the router wirelessly without any problems. When I use my powerline adapter I get the 'unable to contact DHCP Server' error. I've tried unencrypting the router with no success. I've also released/ renewed my IP. [code]
I can't access the bvi interface I use to manage the AP1261N from an IP address that is not in the same subnet of the bvi interface. The AP is configured as root bridge. Obviously I've the same behaviour for the non-root AP connected to it. For sure it's an ap configuration problem as other devices in the same vlan (vlan1) are reachable by the vlan I'm connected to. This is the conf:
version 15.2 no service pad service timestamps debug datetime msec
Wireless client receives a DHCP address from central DHCP server fine. Unable to route outside of own subnet . Continuous ARP WHO HAS (Default Gateway addr) TELL (client IP) messages being received. WLC running OS 4.2.99.0.
We want to use an ASA as a pure routing device. Our network has several internal subnets (10.1.x.0/24), and we want to be able to reach them from outside and to allow access between them.
We have a defined a VLAN for each subnet range with the same security-level, added it to an Ethernet port and made the Ethernet that acts as outside as a trunk, and defined it as the global routing.
We cannot ping any of the subnet IPs defined in the ASA from outside nor we can ping it from the internal IP addresses.
I have been tasked with replacing our company eSoft router with a Cisco ASA 5505 with the upgraded security license. I have been working on the configuration for a couple of weeks now, after reading hundreds of forum posts, watching youtube videos, and endless google searching, and despite my best efforts I am still having an issue I can’t figure out.
I have a couple of subnets, that when the ASA is connected, I cannot ping, nor can they get to the internet or our Exchange server. At this point I’m not sure if it’s an access rule issue, NAT issue, or DNS issue.
Here is the network layout:
ASA: 192.168.0.2 (Primary Gateway) 192.168.0.0 (Primary facility, ASA is the gateway) 192.168.2.0 (Second facility, connected via Verizon point-to-point) 192.168.3.0 (Third facility, connected via Verizon point-to-point)
Background: I have a couple of ASA 5510's I'm going to put in our lab environment. I have restored them to default config and set up the m0/0 interface with an ip/mask and started the http server. My lab environment is on the 10.45 subnet and my .com corporate environment is on the 10.40 subnet. I've also setup DNS and, from the ASA, can ping anything in the 10.45 subnet.
The problem, is that from the ASA, I can not ping the internet or my 10.40 subnet. And vice versa, I cannot ping the ASA from my 10.40 subnet. When I bring up a regular server, there is no special configuration I need to do as those subnets talk to each other and nothing is restricted.
Is there something special I need to do go get it to work? I tried adding a access list to allow icmp, but that didn't seem to work.Oh, and I'm getting to the ASA by RDPing into a lab server (on 10.45) then putty to the ASA.
I have 4 x 2960 switches in a remote site. These are managed by an NMS in our DC, the NMS IP ends in 35.100 with a /23 mask.
When they are first booted, the switches are visable to the NMS, but after a week or 2, 3 of them drop connection to it. If you reboot them again they are fine. You are able to log onto them form thier local router and use a Radius server which is in the same subnet as the NMS.
The odd thing is, whilst they can not ping the NMS, they are able to ping any other addresses in the 34.0/23 range.
The config on the one that does not lose connection is the same as the other 3 and I have also rebooted the NMS.
I have an GRE Tunnel across my head office and remote site with multiple subnets using cisco 1841 routers.I can ping most of the devices on the remote side, but I can not ping certain devices.These devices respond to ping requests on the local LAN, but not through the WAN link. If I change the IP of device than it start responding. I am using same gateway and mask on these devices.The remote site is running classic STP on switches with distribution switch being the root bridge.
From My Router that connects to Cable modem i am unable to ping website 4.2.2.2I am able to ping all other websites fines.Same website i can ping from my pc and all other switches fine.Router has only 1 ACL thats for NAT.
Unable to see the logging message on the user context on ACE,but able to view the logging on the Admin Context.
Admin# sh logging Message logging: none Buffered logging: enabled (level - debugging) maximum size 1048576 Buffer info: current size - 1048576 global pool - 1048576 used pool - 1048576 min - 0 max - 1048576 cur ptr = 916918 wrapped - yes
I am working on a site that has recently added a new subnet and I am unable to ping any of the stations on this new network. I have configured an Exempt NAT rule just the same as the rules allowing access to other networks. I have a feeling the problem is in the Site-to-Site VPN configuration since the new subnet is at the primary location over the VPN.
In the site-to-site configuration I added the new subnet to the list of "Remote Networks" and I still can't communicate with any of the devices on the network. If I go to the main site I have no problems so it appears to be related to the VPN or a configuration in the ASA on that site.
A port scan shows that all the traffic is "filtered" so somewhere either the site ASA or the main ASA is blocking the traffic.
I have RV110W connected in private network 192.168.5.0/24, I have redirected pptp port from adsl modem to the RV110W and VPN works OK. DDNS on the adsl modem is not available.I need to use Dynamic DNS functionality on my RV110W. The device supports several DDNS services (TZO.com, Dyn DNS.com, 3322.org and noip.com). For all but TZO the public "Internet IP Address" shows as 192.168.5.110, which also gets auto registered with the DDNS service.I have tested this with free noip.com account and this is obviously undesired behavior. I need the router to register my real public IP.For TZO it shows the proper public IP, but TZO service is no longer available on TZO.com.
