I have Cyber cafe, And i'm having a problem with My 24 port Dlink "DES 1024d" switch, which has been misbehaving for few months, it looses connectivity to a pcsometimes.....when i reboot the pc, then it works again, But it keep losing connectivity to the other pc's, not at the same time, every time loses connectivity to a different pc.
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My internet connection goes up and down. After further investigation, I've noticed that as soon as i receive a certain # of packets, the internet connection goes down. It may be a process or application that is taking away these packets.
View 7 Replies View RelatedHaving just received a new Dell XPS8500 running on Windows 7 and I have the following problem: My wifi connection is turning off and the name of my network is no longer displaying in the list of available networks. This means that I am unable to access the internet or emails rendering the computer unusable as I am not on broadband (using access from another router close by). It is absolutely critical that the wifi connection is always on.
View 3 Replies View RelatedThis is my network topology. Sometimes it just suddenly loses conenctivity or traffic for unknown reasons, like the internet hangs for much time or maybe some routers just stop responding, even restarting ! Do you think there should be a Multi-WAN router that could take 4 WAN lines and give one LAN to plug at a switch for a better performance ?I know that my setup is wrong, give me your opinion about it and how to fix it .
View 1 Replies View RelatedI have a client who has 4 computers in the house all running wireless. 2 desktops and 2 laptops. One of the laptops is running XP and after 5-10 minutes of surfing, the internet stops working while all the other computers retain a good internet connection. Repairing the connection via the taskbar icon fixes it temporarily until the issue reoccurs.
View 10 Replies View RelatedMajor symptom: Maddeningly intermittent wireless issues with Asus laptop after repair. Unable to connect to network after sleep or reboot on upper floors of house.
History:
1) Laptop wireless was working fine but power jack and case were damaged.
2) Sent away to Asus for free repair (pulled the HD first).
3) Got it back and seemed fine, but...
Problem:Wireless starting dropping after sleep. It's my wife's laptop and she usually uses it on the 2nd floor of the house.Routers are on the first floor. It failed the same way on both my G and N routers. Played with all sorts of settings, disabled IPv6, reinstalled drivers, checked for BIOS update. No luck . Eventually saw some event log entries that might have been associated with a bad wifi card. Ordered a new Intel 100 N (OEM model) and replaced card, same issues. Swapped card with a Broadcom 1510 from an old Dell I had. Same problem.
Tried more settings, static IP, flushing DNS, etc. Same problem.At this point the event log has nothing notable in it, no error logs anywhere the wireless card will just report no connectivity.when I work on this laptop I take it down into my office, which is on the 1st floor by my router. The laptop works flawlessly there (10 feet from the router). So my theory at this point is that Asus damaged or otherwise messed up the laptop antenna while repairing the laptop. most of the time on the 2nd floor the windows wifi icon reports a perfectly good signal, and if I boot the laptop on the first floor and walk upstairs, the laptop works fine(as long as I don't reboot or let it go to sleep).
ATTACHED: My current running config with sensitive info taken out.
I have a Cisco 881 Router connected to cable modem. The router is running IOS 15.1.
I have it configured exactly the same way as an 877 router running IOS 12.1 which does not exhibit the problem. Just a standard LAN/WAN config with basic routing/firewall.
When the internet connection is lost for any reason and then re-established the router will no longer pass internet traffic unless I reboot the router.
I used Cisco Configuration Professional to configure the router. The key setting seems to be the Router Static Route. We have a static IP and I set static route with the "make this the default route" checked. Then I set forward (next hop) to the IP my ISP gave me as their gateway.
This is exactly the same way I set the 877 router using the same ISP but in a different office.
Every so often the internet is lost due to power outage or the ISP doing something on their end and every time that happens we have to reboot the router which is quite annoying.
I did not have the "permanent route" check mark checked but I do not have it checked on the router that does not have the problem either so I don't think that's it.
When I set the static route to "interface" then added the static IP of the next hop it will continue to work for incoming connections but not outgoing.
My primary home machine loses network connectivity for a very brief moment once or twice a day. Here's what I've observed over the past few months:
Seems to happen every 12 hours after a restart Disconnect is very, very brief. Putty sessions, online games, or other applications that require a consistent connection disconnect but it's rare that I can see a ping fail when everything else disconnects.Does not coincide with network problems on other machines (Xbox/media PC/wife's PC).
Other details about my system and home network:
Windows 7
Asus motherboard (couple generations old) with onboard ethernet
Ethernet > wired hub > wireless router > cable modem (wife's PC is connected to the same hub and does not have the problem, at least not on the same schedule)
Things I've tried (and will probably now try again just in case)
Restore network card driver (I'm in the process of finding a specific one for my motherboard)
Tinkered with power saving settings in the ethernet card drivers.
Fully up-to-date Windows install.
Static IP address reserved by the wireless router running DHCP
I'm not 100% sure, but I think this problem persisted across Windows OS upgrades (from Vista to Windows 7 a few months back)
By far the weirdest part is that it seems to happen every 12 hours. Like clockwork, I can predict that I'm going to disconnect from any persistent online connection if I know the last time I restarted my machine.
Solved:I caused my own problem long ago when trying to set static IP addresses in my home. I have a Netgear Router (WGR614v9) and I played with the Address Reservation feature. In addition, I manually set the IP address I wanted to have on my machine using the normal network card properties. Setting the IP address manually is what seems to have caused the conflict.
Finally looked in the Windows Event Viewer and the culprit was quickly identified. At time of restart and every 12 hours later, the following error appeared:
The IP address lease 192.168.1.20 for the Network Card with network address XXXXXXXXXX has been denied by the DHCP server 192.168.1.1 (The DHCP Server sent a DHCPNACK message).
I accidentally fixed it for all affected machines by changing the start address of the DHCP server on the router (increased it from 20 to 30). That seemed to kick all the manual entries out and set them back to automatic obtain mode.
Region : Others
Model : TL-WR740N
Hardware Version : V4
Firmware Version : 120320
ISP : Local PPPoE
I'm using this router for connecting 2 PCs, one lap top and few mobiles.The LAN network is always stable and never loses connection, but I'm having problems with the wireless connection. My lap top runs on wireless, and 3 Android mobiles, an xperia mini pro (problematic), xperia Tipo and Alcatel OT-908F. Almost always when I login to facebook on any of the mobiles, pictures won't show, and also youtube videos thumbnails won't show. On the xperia mini pro after 2-3 minutes of surfing, or doing anything else the connection drops, and then the mobiles can't see the wireless connection. My lap top can see it, but it cannot connect. After restarting the router everything is back to normal.
In my LAN, I have always been used an Aironet 1250 for internal use and always work fine. Now, I added a 3com AP but both AP are not correct. When I turned off the AIRONET 1250, the 3COM AP settings works fine. When both are turn on, the 3COM AP loses connectivity all the time.I have heard about the overlapping channels in 802.11b/g networks.
View 8 Replies View RelatedInternet connectivity on my laptop is lost shortly after beginning to upload/download files over the internet to my cloud storage provider. I also lose connectivity when transferring files to or from the laptop within my LAN to a desktop computer connected via wireless router as part of a workgroup. Connectivity is only restored once I restart the laptop or uninstall, then reinstall drivers for my wireless network card. The issue then reoccurs once file transfers begin again.The laptop is running Windows 7 Home Premium SP1. The driver for my Intel Wireless WiFi Link 4965AGN internal network adapter are up to date. I have a Linksys WRT610N ver.2 router, and an HP Pavilion dv6500 laptop.
View 11 Replies View Relatedfound that the problem is (temporarity) corrected after we power cycle the router.
The firmware installed in the latest published. See below:
System Information
Serial Number : NKS15481665 Firmware Version : v4.2.1.02 (Jan 18 2012 14:10:55)
PID VID : RV016 V03 Firmware MD5 Checksum : a9817f2dbdcbd6a5c109eaa21b1c3545 ystem InformationSerial Number : NKS15481665 Firmware Version : v4.2.1.02 (Jan 18 2012 14:10:55) PID VID : RV016 V03 Firmware MD5 Checksum : a9817f2dbdcbd6a5c109eaa21b1c3545
I'm currently implementing Microsoft System Center 2012 Operations Manager, the curent stage of the project is to add the network devices to SCOM via SNMP in order to monitor them, I am able to add them all and monitor; however, my ASA 5510, although SCOM discovers the ASA via SNMP and adds it to the network monitoring list, it loses SNMP connectivy every 30 minutes, and 15 later it reconnect with SCOM, then after another 15 minutes it loses the connection again, and so on and so for.
View 1 Replies View RelatedI have a new EA3500 router that's working great for a variety of devices* except a Windows7 laptop. 24 hours after establishing a connection, the laptop loses connectivity and it's very difficult to re-establish a connection. Usually I have to reboot the router, but 24 hours later the problem returns and Windows is unable to connect.
My router settings include DHCP client lease time set to 1440 minutes (24 hours), so I thought the problem might have something to do with DHCP lease renewal. To test this theory, on Saturday night I did ipconfig/release and ipconfig/renew and established connectivity from the laptop.
Sunday morning I spoke with Linksys support and changed several settings per their recommendation:Network mode mixed (I had it on N-only for some reason)Assigned different SSIDs to the 2.4GHz band and 5 GHz band2.4 GHz band channel is 20MHz only, using channel 95 GHz band channel is 40 MHz only, using channel 161I also power cycled the router. Everything worked fine until Sunday night, 24 hours after the release/renew, when I lost connectivity. I am not sure what to try next and whether the problem lies with the router or the laptop.
Is there a way to configure the switch remotely if it looses it's management IP.
View 14 Replies View RelatedThe two stacked Cisco 3750G Access switches on a particular floor in my coy just lost connectivity to the distribution Switch this morning. This meant that all Users connected to it couldnt connect to the Internet nor access local network resources.I couldn't ping the Switch IP, I couldn't also access the Switch via Console port. Each time I tried to gain access via the console port, I keep getting "Authentication Failed" message.What should I do next? How do I gain access to the Switch?
View 1 Replies View Relatedcan i use dlink switch as a router to set up LAN
View 1 Replies View RelatedI have an old Dlink DI-604 that I'd like to configure to work as a switch. I think this is possible but not sure how to do it. Switches are cheap but if I could save a few bucks with some tweaking I'd prefer that. Plus I figure I'd learn a bit about networking.Dlinks site on the DI[URL]Uverse and I'm out of wired ports on the Residential Gateway. I would like 2 more ports to network my PC and NAS, so my laptop and Xbox can access their files.
View 4 Replies View RelatedI have a computer connected through wifi to the internet.I then turn on the computer into ICS mode and connect that to my PS3/Xbox.I'm trying to get an OPEN NAT type but just can't seem to get it working.I've read a few different pages and have tried some things but it's never worked.I've heard of bridging connections and the sort but I'm not familiar with it. I just want to get an OPEN NAT on my PS3/Xbox.
View 10 Replies View RelatedI have a network which was recently switched from dsl to comcast. The default network is 10.1.10.1. The dhcp is working with the 5 or 6 installed pc's. All pc's are running xp professional.I inserted the dlink 4 port switch to add a new port by inserting it between the router and a pc.
View 4 Replies View RelatedWe setup a home network in our new house but we have a problem with limited connectivity in specific configuration.
There is few situations to describe the problem :
1. If I connect my computer directly to the modem I can access to the internet. (modem --> computer = internet OK)
2. If i connect the ethernet cable (in the wall) between my modem and RJ45 jack in the living room and connect my computer directly to the RJ45 I can access to the internet. (modem --> cat6 cable in the wall --> computer = internet ok)
3. If I connect my router directly (without the cat6 cable in the wall) to the modem and my computer to the the router I can access to the internet. (modem --> router --> computer = internet ok)
4. If i connect the ethernet cable (in the wall) between my modem and RJ45 jack in the living room and connect to router to the RJ45 and my computer to the router I CANNOT access to the internet. (modem --> cat6 cable in the wall --> router --> computer = internet access problem)
5. If i connect the ethernet cable (in the wall) between my modem and RJ45 jack in the living room and connect to a swith to the RJ45 and my computer to the switch I can access to the internet. (modem --> cat6 cable in the wall --> switch --> computer = internet OK)
With those tests I am not able to figured out what is the problem... router is working in situation #3. cable in the wall is ok in situations #2 and 5. How to make my router working when connected to the RJ45 jack in the living room.
There is my component :
Router --> D-Link WBR-2310
Switch --> Trendnet TE100-S5
Modem --> Thomson DCM475
Cable in the wall --> Homemade with 568A standard in both end.
How to install single port D-link wifi router through Modem "Single Port Wifi Router"
View 1 Replies View RelatedI've had my network up and running for several years with no issues. Last week I upgraded my router to a Dlink 826L and now anything connected to my downstream Dlink DSS16+ can't be accessed.
View 3 Replies View Relatedi found that cisco small business SF302 PoE managed switch connect with the end device (RFID component) would causing packet drop issue.how should i isolate the issue and proper troubleshooting? would it cause by the PoE issue, or the 10/100 base etc.
View 5 Replies View RelatedI'm not sure how to connect my firewall for Active/Active.
I'm sure the 5510 has layer 3 ports.
Can i configure more than one port to sit on the same VLAN?
Or configure more than one port to Trunk the same VLANs.
is it possible to assign a loopback address to a typical switch port on a 2950 switch? I want to be able to have some devices connected to a switch to test access lists and VLANs.
View 3 Replies View RelatedOn the supervisor card of a cisco 6500 series, according to the following link, [URL] it only has 2 uplink ports on the card. Would I be correct in assuming that I only have those to ports that I can configure IP addresses on?
The cisco that is being devlivere is coming with a 48 port switch and 24 port fibre switch. Could I change any of those ports into a router port and configure IP addresses on those?
The supervisor card is a ws-sup-720-3b the 48 port switch is a ws-x6748-ge-tx the 24 port fibre switch is ws-x6724-sfp
I'm fairly new to Cisco products am in the process of developing my network knowledge on a deeper level. I have a 3825 with a HWIC-4ESW and I'm struggling to fully understand how the two "see" each other. I've setup a V LAN with a layer 3 address on the HWIC and added the switch ports to it. This seemed to allow devices connected to the switch ports to talk to the built-in router ports. I thought this was all making sense until i applied an access-list to the router port. It's a simple ACL i'm just using for testing and the only thing it does is blocks telnet from anywhere. I know the ACL is setup properly because if I connect a device directly to the router port i cannot telnet to the port. However, if i connect a device to one of the switch ports, i am able to telnet to the router port successfully.
It seems that I'm missing something with how traffic flows from the switch port to the router ports and how the two "see" each other.
In my 3750 stack switch there are more than 10 L3 vlans currently in use.In that only one vlan for example vlan 11 (we given up link directly to the nodes connected to that ports which is in vlan 11)losing connectivity for sometime and again connectivity restored.Except Vlan 11 all other vlans are working fine. When we troubleshooted the issue some of the ip's able to ping and some not able to ping. checked the interface status of that ports (no crc and input errors) and port is in up status only.we also checked cpu utlilisation ,device uptime, all are no issues found. am sharing my sw basic config and one interface status at the time of issue.But only one port learning more than 50 Mac-Addresses dynamically.and am learning mac address violation in another port which is port security and storm control enabled on that port..Its seems to be any attack or something else????
interface GigabitEthernet1/0/20
--More-- description
switchport access vlan 11
switchport mode access
spanning-tree portfast
logs:
Mar 8 05:58:25.848 IST: %PORT_SECURITY-2-PSECURE_VIOLATION: Security violation occurred, caused by MAC address 0026.0a18.8218 on port GigabitEthernet1/0/16.
Mar 8 05:59:25.862 IST: %PORT_SECURITY-2-PSECURE_VIOLATION: Security violation occurred, caused by MAC address 0026.0a18.8218 on port GigabitEthernet1/0/16.
AT the time of issue interface status:
sh int gi2/0/14
GigabitEthernet2/0/14 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0026.ca46.5c8e (bia 0026.ca46.5c8e)
Description:
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,[code]......
I have a dell studio 1588. I was connecting fine to the Internet but then received the message no wireless connectivity. Hardware switch off. I have done a complete system restore turned on the wireless button at f2 repeatedly but the problem persists. Someone I spoke to suggested a new wireless card. How can this support if the switch is not working.
View 1 Replies View Relatedwhat is the use of no switch port command in L3 switch?
View 7 Replies View RelatedI have a cisco 1941 ISR router and I am trying to configure a router to allow a modem for Offband or Out of band access.Below is the configuration on Aux port on Line (n): [code] I have US Robotics 56k Faxmodem which is connected to aux port of router and I am using USB dialup modem with my laptop to dailin to the router which is connected to a US Robotics Faxmodem. Then I have accessed my USB dialup modem throught HyperTerminal and I can issue all at commands and to dialin to the modem I have used the following commandatdt91401111 1111 (atdt followed by country code, area code and landline number)Once I issue the above command it give me message Connected and after this I just get a flashing cursor. I cannot do anything nor will it display a username login prompt.
View 1 Replies View RelatedI have an equipment which has LAN port for wired connectivity to the computer. I can connect 10 such equipment thru LAN to the computer & display the data of all the equipments on computer screen. This LAN network I wanna convert to Wi-fi/wireless.
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