we manufacture an industrial device that runs embedded linux, and we are throwing ideas around on how we can find devices that are connected to our network, without knowing their ipAddress. I know this is possible, because Advantech do it with their ADAM utility to find units. I put a WireShark sniff on my LAN as the ADAM Utility found a unit, and saw the following[CODE]
View 2 RepliesHow to find the location of a device by using mac address of that device.
View 2 Replies View RelatedI have wireless Cisco Router, model number EPC 2425, which has a NAS device attached to it. I'm trying to find the IP address of the NAS device.
View 1 Replies View Relatedhow do i broadcast a message on my network using command prompt?
View 2 Replies View RelatedSome background information of my current configuration.
VLAN 100
-Computer A
interface gi1/1/1
[Code]....
From computer A, i had run command prompt and ping 192.168.2.100(computer B) and successfully get a response. I had repeated the step but ping to a broadcast address (192.168.255.255) and it was unsuccessful.
how a device (PC or router, in this example) knows to slow down broadcast of traffic.Say my cable modem from my ISP is coded to only allow 50mbps.My internal network supports the normal 100mbps.How does my router know to not send my cable modem more than 50mbps of data (because anything above, I assume after the cable modems RAM fills, will be dropped).I know TCP/IP has "Autonegotiation" which determines link type, but it's only based around if t's 1000/100/10 ethernet. No custom speed variable, such as 50mbps in this case.Say I put my network uploading data maximum stress to my internet connection, at 100mbps. Will my cable modem ever send some special packet telling me router that's too much or something?I suppose if I knew this, I could also understand how when I upload a file to another computer on my network, it does it at the full 100mbps, but over the internet, limited to my upload speed; but how does my computer or router know to slow down because my ISP doesn't allow 100mbps up? It has to be able to detect link speed somehow, otherwise just constantly sending 100mbps up will result in tons of lost data at my router/cable modem, and give the computer a frequently false sense of upload speed.
View 1 Replies View RelatedTrying to find out if a switch learns a mac address of a connected device which only sends broadcasts to the switch port (no unicasts). For example one type of attendance terminal...
View 14 Replies View RelatedI have an AS-external route being redistributed into OSPF from a static route on one of my routers. I recently changed the static route from a /24 to a /26 and all of a sudden the link ID of the segment in the OSPF database went from the network address to the broadcast address: Code:
View 5 Replies View RelatedHow can know the Broadcast address before subnetting? I know how to calculate the broadcast address , but don't understand 'Broadcast address before subnetting'?
View 2 Replies View RelatedSo I was having trouble loading a game on my computer and I was scrolling through forums looking for an answer and one answer that supposively worked for a lot of people was to unisntall and reinstall my network card.IT told me to go to devices -> right click network adapter -> uninstall -> then scan for hardwarer changes to reinstall When I clicked uninstall an error message popped up and said "Unable to uninstall device because device is required on startup" and then it apparently just uninstalled it anyway and it showed back up after I clicked "scan for hardware changes".Now ever since, everytime I try and connect to the internet my computer says "Limited or no connectivity" and I'm unable to access the internet on that computer, the computer I am on now can connect just fine, so it must have something to do with the network card that i supposively unisntalled.
View 17 Replies View RelatedI know that the routers communicates using routing protocols and that they forward the ip packets. So I looked in the IP header and the RIP header(for example) and I don`t understands when an packet comes in how does the router understands it`s type? (There`s no byte field to tell him explicitly that this is an ip packet or a rip message)
View 9 Replies View RelatedSylvania Smartbook synet7wic-bk cannot get online. It shows my wifi is on, but I do not have a tab for wifi information, to put my info in it.
View 2 Replies View RelatedI have a router Cisco 2800, but always is in Rommon, the message show is:
device does not contain a valid file system
dir: cannot open device "bootflash:"
rommon 8 > dir usbflash0:
Checksum failed on c1840-usbfslib-m
Expected checksum: 91d6, calculated checksum: 4527
open: file "c1840-usbfslib-m" not found
open(): Open Error = -1
loadprog: error - on file open
cannot load the monitor library "bootflash:%c1840-usbfslib-m"
from device: usbflash0dir: cannot open device "usbflash0:"
I just bought pc anywhere software, after instalation in my host pc and laptop(remote) it work very well when I used it in the same network in my Rv camping ground where I have a mobil router with a Verizon broad band card.Later when I come back home where I have a cable internet with a router, I tried to access the host pc but after several minutes trying it said cant find host pc.
View 6 Replies View RelatedWhen disabling SSID broadcast and enabling MAC address filtering on WAG320N, my other wireless laptop get disconnected. And when you try to connect, it doesn't connect again.
View 3 Replies View RelatedI have recently configured secondary ip address on LAN Interface of Cisco C6509.. We have some application which needs to use broadcast traffic communication to communicate with client... Broadcast is working within subnet & also working from broadcast server to primary subnet. But not working from secondary subnet.. I have checked broadcast within secondary IP range & it's working fine... Secondary not working broadcast with primary and also with broadcast server... broadcast address is different for these subnet but both should be communicate since configured on same interface... When I went through Cisco website found that command "ip directed broadcast" which will pass broadcast to different subnet... But I'm not sure whether any other impact if I enable that command on particular Ethernet interface...
View 6 Replies View RelatedMy friend has just got a laptop and when she is at my place it shows that my computer is nearby but message says "Windows was unable to find a certificate to log in to network".
View 6 Replies View RelatedNEXUS 7000 Octopus internal error in device 78 message. I got this on NEXUS 7000 logs:
Nov 12 22:05:14 smale-outside : 2012 Nov 12 21:05:14 BRST: %MODULE-2-MOD_DIAG_FAIL: Module 2 (serial: JAF1548AMKB) reported failure on ports 2/1-2/32 (Ethernet) due to Octopus internal error in device 78 (device error 0xc4e0025b)
Nov 12 22:05:17 smale-outside : 2012 Nov 12 21:05:17 BRST: %MODULE-2-MOD_FAIL: Initialization of module 2 (serial: JAF1548AMKB) failed
Nov 12 22:05:18 smale-outside : 2012 Nov 12 21:05:18 BRST: %MODULE-2-MOD_FAIL: Initialization of module 2 (serial: JAF1548AMKB) failed
[code]....
I only have found:
[URL]
which does not match reality : No one was configuring Vlans.
I have a Asus EeePC SeaShell 1005HA-H and i have a LINKSY ROUTER in my home. I recently been having problems with my wireless internet. I know it isnt the router because i have went to my boyfriends house and my laptop usually automatically connects to his internet and the same message continues to show up "Acquiring Network Address message". I try to repair the network and a error comes up. Then i went to check the firewall settings and the firewall is tured off.
View 1 Replies View Relatedhere where I work we are having an issue with IP Address conflicts. We are not sure exactly why, though. We have only had it happen 2-3 times so far, but this has been over the past week or so, and we would like to get it resolved. Here is what is happening: Last week we were getting an "IP Address conflict" message on one of our computers. It had received 192.168.3.112 from our DCHP server, so we switched it to a static IP address up beyond our DHCP range. We then tried pinging the address with the conflict, but got nothing. We figured it was some device that had a static address, so on the DHCP server we reserved it to a non-existent mac address so it wouldn't hand that one out again. This wasn't a problem, since it was an isolated incident.
Since then we have tried periodically pinging 192.168.3.112 to see if there is actually a device using that address, but have gotten no replies. Since then we have had another one or two times where this has happened, but with different IP addresses. We went around and checked a couple of different wireless routers that we had deployed, but the DHCP had been disabled on all of them (but then again, the issue came up just recently, while the routers have been out there for months).
I am receiving this error after connecting a copper adapter on a GBIC blade in a 6509. Here are the results from the show Interface. I am waiting to confirm the device on the other side settings but as far as I see I get UP and Up for protocol and line respectively.
GigabitEthernet2/11 is up, line protocol is up (connected)
Hardware is C6k 1000Mb 802.3, address is 0009.11e4.f3ce (bia 0009.11e4.f3ce)
Description: RCPBSDEV
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
[code]....
how do i find the wpa key for my Wi-Fi device
View 1 Replies View RelatedI have a Netgear WNR612 wireless router, which worked fine for a few weeks. Then something happened and I can't keep the connection anymore. It happened right after I used iTunes to update my iPhone, perhaps a coincidence, but I'm mentioning that just in case. Internet still works fine with ethernet cable straight from the computer, only the wireless connection doesn't work. This happened about a month ago and I haven't been at home much to fix the problem. I have turned off and unplugged everything for several days at a time while gone. I get a Network Error message saying, Windows has detected an IP address conflict. I have tried restoring the router back to factory settings and reinstalling the wireless card. I have tried changing the IP address settings both in the Network and Sharing Center and the router admin page. What I think I should do is change the IP address in Command Prompt, but when I type "ipconfig /release", it says "No operation can be performed on Wireless Network Connection 2 while it has its media disconnected" and the same for Local Area Connection. I don't understand what this means, because there is a wireless key in my keyboard and there is a white light (not orange) like there should be. Also in the Network and Sharing Center, I can see that the connections are enabled.
View 14 Replies View Relatedi cant find Ports (COM & LPT) in device manager . so how can i change that setting?
View 1 Replies View RelatedI had a Linksys BEFSR41 router with AppleTV 1stGen with 0 problems.Now I have a DIR-655 Vb1 2.00NA firmware and itunes now cannot find the AppleTV as a device. I have tried resetting the AppleTV to factory defaults re-installing latest firmware and reinstalling itunes, powering down all devices etc., and no way can itunes find the appleTV although the appleTV is on the net and seen by the router.I have gone to a wired connection to the router too because the router kept dropping the wireless connection to the router too. Of course I got the DIR-655 for wireless
View 15 Replies View Relatedi have a problem in(dell inspiron N5110 ) wireless device. IN device manager (Dell wireless 1702 802.11b/g/n & bluetooth peripheral device in warning symbol) and i can't able find any wifi device.
View 1 Replies View Relatedmy wireless connection suddenley stopped working, the light no longer turns on and the wlan is no longer an option in the vaio smart network folder, its completley disapeared, i can only connect to the net via ethernet cable now
View 4 Replies View RelatedI get 2 troubleshoot messages printer cannot be contaacyed over network and windows can't find a computer or device named....
View 1 Replies View Relatedi reinstall my computer today, and i can't connected to the internet.also, i can't find newtork adapters in the device manager section.something must wrong, i just don't know what's wrong.
View 2 Replies View RelatedI recently installed the above wireless card, but I can't get it to work. Under the Device Manager, it has this error:This device cannot find enough free resources that it can use. (Code 12)If you want to use this device, you will need to disable one of the other devices on this system.I've tried updating the driver, and disabling the little USB wireless device I was using before, but I still can't seem to get it working. [code]
View 9 Replies View RelatedI have added manually the cisco asa 5520 to lms 4.2 , because automatically the lms didn't discover it ,however when i tried to open the device using cisco.MessageCannot find applicable device package for 192.168.100.100This error could be due to one of the following:- The device package for this device type is not installed.- Device support for this device type is not available.- You are trying to open a component inside a device.To correct the problem, either install a device package for the device type, or open the parent device to manage the component.
View 1 Replies View Relatedcan't find my wireless adapter in Device Manager.I was able to detect wireless connectivity yesterday. After we replaced our router, my laptop says my wireless adapter is disabled.I am unable to find the "Manage wireless networks" in Open Network and Sharing Center. My Fn+F2 buttons used to enable and disable wireless is not working either. I tried setting up our previous router but it still won't work. I am using Windows 7. Gateway NV59C.
View 9 Replies View Relatedhp dv9292eu laptop can't find the wifi card in device manager
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