Cisco WAN :: 2960 - Switch Keeps Dropping Network Connection?
Oct 6, 2011
About 4 months ago or so I had what I though was a firewall problem, tuned out to be two bad switches or so I thought. I replaced the switches with 3 com switches and everything seemed fine. Until Monday, my network was down again I though because I had a patch cable plugged into the same switch because when I took that patch cable out of the picture and reboot the switches everything seemed good. Then Tuesday I installed a new Cisco 2960 to relieve some of the stress on a switch. Then I plugged in another 2960 and started checking out the network assistant and monitoring tools but every time I clicked refresh or just clicked on the newer of the two 2960s the network connection would bounce? Now today the switch that had been in production the 3com just started to bounce its connection on and off ? I had to plug everything into the new 2960 and unplug the 2nd 2960 to keep the network stable, well its only been about a half an hour.
Are the switch trying to sync speeds with each other?
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Jan 10, 2012
ws-c2960-24tt-L Ethernet switch adding or removing any device from switch cause a loss of connection to all other devices on switch for about 60sec.
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Aug 1, 2012
I have noticed a few times over the last month that my PC would not load pages due to connection problems. If I hover over the Network icon, it say that I am not joined to a network but within minutes, it reconnects itself. I use http://www.scan.co.uk/products/zyxel-pla-4201-500mbps-mini-powerline-adaptor-twin-pack power adapters and they "appear" to work well with good speeds as I download and game online alot. I have noticed that today the problem is really bad. It loses its connection every 5 or 10 minutes and then reconnects itself as if nothing has happened. I tried using my iphone on the wireless and it also seemed to have dropped out on connection. I have tried resetting my router too but with no joy
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Mar 17, 2012
I'm looking to improve my connectivity,as the internet drops out a few times a day.Let me explain - I hope I'm correct in my assumptions.Every few hours, my PS3 will have a DNS error, and upon checking my iPhone, I notice that it's switched from wifi over to 3G and there seems to be a loss of connection. I cannot reconnect to the internet until I've restarted my router, or 'forgotten' and rejoined the network.
Additionally, we have an Apple TV, and connection drops out about 3 or 4 times every hour, which is very frustrating when trying to watch a movie.
[code]...
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Jan 15, 2011
I have two different friends that are having problems with their printers which are connected to their home network. One has an Lexmark printer wired to their router and running Windows Vista on a laptop. The other has an HP printer connected to the network wirelessly and the laptop is running Windows 7.
In both cases, they are setup to use DHCP. When first setup and the printer software was installed, everything worked fine. Now they each get a message showing 'offline' when they try to print. I went to each of their houses, downloaded and installed the latest printer software and they were printing again. After a short time, the same problem surfaces.
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Feb 6, 2013
Wondering if this switch is capable of being a backbone switch for a network of about 1000+ users and if the switch can handle a sustained 30Meg of data going across it?
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Jul 10, 2011
I have an Ubuntu box, 11.04 x64, running on a Dual Opteron SFF box (iWill ZMaxDP... pretty old machine). Up until a few weeks ago, it was acting as a Windows 2008 Server, but i moved it to Ubuntu.
Anyway, the machine will not stay on the network for any amount of time, without falling off... I have changed network cards, cables, ports on the switch, etc, and nothing seems to work. I have a Windows 2003 box giving out DHCP addresses, and for a while, i actually tured that off and setup a second Ubuntu box to give IPs... it made no difference. The box gets an IP, and can ping outside for a bit (2 min or so) and then just looses connectivity... ifconfig shows it with an IP (i have tried both Static and DHCP config) and nothing seems to work.Restarting the network stack (/etc/init.d/networking restart) some times gets a connection working for a few min, but then it falls over again..
Just to note, the main onboard network card is not showing up for some reason. I have an Intel Dual GigE PCI card installed. Eth2 is the "Working" interface, an ETH3 is not connected to anything.... Also, this is probably the first time since i installed the machine that the connection is staying up.
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Jun 28, 2011
I have a desktop computer and a laptop computer both running Windows 7 Home Premium. The desktop is connected to the router directly and the laptop is connected to the wireless network. When I restart both computers, I can see and access the other computer through the home network without problems. But after a while, sometimes just a few minutes, I can only see the other computer but cannot access it. Sometimes, I cannot even see the other computer. If I do a "ipconfig /release" and a "ipconfig /renew", it may sometimes correct the problem for a while.
I have looked at many related discussions on the web and none of the suggestions work for me.I have the firewalls disabled on both computers, as well as the ipv6 and IP service. I have also disabled the Bonjour service.I have turned a number of services, such as computer browser, server, workstation and many others to automatic as people suggested.
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Oct 17, 2011
I have two wifi routers which I have connected together with an ethernet cable to extend coverage across my house. The ethernet cable is connected to a LAN port on the first router and the internet port of the second router. This works fine and creates a second network that I can connect to the net on. The problem iseemingly randomly, about every 15 minutes, the second router will lose internet connection. My laptops and phone still stay connected to it, but windows lists it as having no internet connection. If I then wait a couple of minutes and reconnect, internet will be working again.
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Jan 31, 2013
Periodically I will loose internet connection even though when I click on the wireless applet in the tray it says connected. If I disconnect and re-connect it will work fine for a few hours. Takes all of 20 seconds to do. Any problems with 1703 wireless card? Have installed the latest drivers.
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Sep 16, 2011
I have a work computer...Dell Latitude 6400, AT&T Global Network Client (Company VPN service), using Novatel USB551L from Verizon, with their new 4G LTE. First connect to Verizon, then it automatically launchs ATT Global Network Client, once connected, the system automatically maps drives. I stay on for about 15 minutes average to 40 minutes that's when the Verizon drops/disconnects. This consistantly happens throughout the day!
1. If I connect to a "local" wireless signal NO dropping.
2. If I tether my Sprint Android, NO dropping.
Only dropping with the Verizon. I MUST have the Verizon dedicated to this work computer to run the VPN and hopefully (very soon) a mandated VOIP with Avaya!Called Verizon- they sent me a new USB thinking that might fix it. But same thing. They are showing signal strength 4G. Nothing on their side.
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Jul 13, 2012
I have been having a problem with my 4400n dropping connection when streaming video / audio.It is connected half duplex to a cat2950 and the media server is mediatomb on a linux box the client is a ps3 presently.
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Apr 2, 2012
I have a home network with a Linksys E4200 connected to the ISP's fiber box. The problem is that when I'm connected to the Linksys, either wired or wireless, the connection to the internet will drop after what seems to be a random amount of time (normally anywhere from 2-10 minutes). I can restore the connection by doing any of these things:-reboot Linksys-disconnect and reconnect cable from router to fiber box-if on wireless connection, make changes to the router wifi settings, like change the wifi channel.The internal network stays up, and I can ping both the internal and external ip of the router, but not the fiber box. I have also had the same behavior with an Edimax Wifi AP and less frequently with a Edimax router (once every 1-2 days). I have done everything I can think of:-changed the wifi channels-changed the ip ranges, subnets, turned router DHCP off and back on-booted the fiber box-changed cables-updated all routers to the latest firmware, the network cards with latest drivers...and loads other things that I don't remember right now. For the wifi side of things, there are no other networks in range that could interfere. The same problem occurs on both my and wife's Win 7 laptops and on the iMac (latest OSX). Here's a fun detail: while the Linksys has lost its connection to the internet, I can still access the internet through the old Edimax router connected to the same fiber box, either wired or wireless.
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Feb 18, 2011
My network is slow with a normal switch connection. How do i improve the connection and can cisco switch improve performance?
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Aug 25, 2011
i have 2960 Catalyst with LANLITE. And i cannot set "transport input ssh", it allows only telnet. I'm wondering if cisco lanlite switches have ssh input in newer releases of IOS or there is no way to make ssh input on this switch?Here's show ver output (i removed all serial and part numbers):
S14#sh ver
Cisco IOS Software, C2960 Software (C2960-LANLITE-M), Version 12.2(37)EY, RELEASE SOFTWARE (fc2)
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Thu 28-Jun-07 18:07 by antonino
Image text-base: 0x00003000, data-base: 0x00D00000
[code]....
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Nov 12, 2012
i would like to know how to set the following on cisco ws-c2960-24 ttl:
1. SSH CLI
2.PORT SECURITY REMOVAL: Limits MAC@per port with no shutdown
3.Set port to protect
4.Set RSTP
5. Finally how do i set up TFTP Server from windows server 2008
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Dec 15, 2011
I have a cisco catalyst 2060 poe switch, exitsting flas is flash:/c2960-lanbasek9-mz.122-50.SE5/c2960-lanbasek9-mz.122-50.SE5.bin
I downloaded latest flash (c2960-lanbasek9-mz.150-1.SE.bin) and updated the new flas through telnet while reunning tftp server. and tftp server is given the message sent 2960-lanbsek9-mz,SE.bin to (10.10.10.1), 11847957 bytes
after reload the system i login telnet and saw the verson still it is showing old verson, then how can i comform flash is up-dated or not...
DETAILS
my tftp server ip is: 10.10.10.10
switch ip is: 10.10.10.1
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Nov 23, 2011
i have a switch 2960 24TC-L with c2960-lanbasek9-mz.150-1.SE.bin and SSH v1 enabled.When i try to enable SSH v2 the swith tell me that i have to create a crypto key rsa. I generated the crypto key rsa with 1024 bits and when i try to enable the SSH v2 i receive the same message.
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May 16, 2012
how to shutdown the cisco switch 2960.......
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Jan 18, 2012
how to set up SNMPv3 on a Cisco Catalyst 2960-S switch in order to manage it with Cisco Prime NCS?
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Jan 28, 2013
network conection directly from router is ok but through 24 ports switch i am unable to connect
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May 26, 2011
I have a question you do do remote access ssh and telnet remotly to a 2960 switch?
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Jan 10, 2012
I replaced an access switch 3750 with a switch 2960. Basically I just copy the whole config of the 3750 to 2960.
The 3750 use AAA, Crypto pki trustpoint TP-self-signed and radius-server host etc.
Now I can only telnet to 2960 but not SSH to it.
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Oct 18, 2012
I'm trying to configure Catalyst 2960 series 8 port switch in my office. I have just plugged in switch and started and then put Ethernet cable (which is coming from the wall port (LAN) into CONSOLE (switch). and connected my laptop's ethernet cable to switch's 1x por
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Nov 8, 2011
We have one Cisco 2960 Catalyst switch.Rule Title: The administrator will ensure passwords are not viewable when displaying the configuration. Right now my user passwords are visible in plaintext. I tried #username <admin> password 7 - but everything I try there is an error I also tried #username <admin> secret but it says I can't have both a secret and password for a single account.
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Apr 7, 2012
we are using 2960 cisco switch asn we are trying to configure port security.we are able to configure MAC base port security, but unbale to configure IP base port security.can any one guide us can do IP base port security like MAC port security. if not which switch will support IP and Mac base port security.
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Jun 13, 2012
I'm having trouble setting up SSH on my new Switch.
no aaa new-model
aaa authentication login default local
ip domain-name king.local
[Code].....
I would like to be able to use Vlan 10 192.168.155.1 for SSH remote management.
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May 23, 2011
I have 1 internet router 2960 and 2 No's ASA firewalls,The issue is Suppose if ASA-1 fails the failover will happen on ASA-2 but The issue is i dont have a layer 2 Switch in between the ASA's and Internet router, i have to manually shift the cable from ASA-1 to ASA-2,what sort of configuration i can do on 2960 router interfaces to support failover from ASA-1 to ASA-2, I have enough interface on 2960 router to occupy ASA-2. These all 3 devices should be in 1 Subnet.
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Feb 5, 2013
I have a statck of 4 2960s switches, with POE powered access points on 2 of them. All of the access points appear to be functioning normally. For some reason, on 3 interfaces connected to access points, I get the following when issuing show interfaces status:
Gi3/0/9 connected: T 7 a-full a-1000 10/100/1000BaseTX
^
My question is regarding the "T" in the status field. I can't find any documentation on this.
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Dec 12, 2006
I have CISCO 2960 switch at my LAN. How to configure its IP address from console or hyper terminal ?
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Jan 14, 2013
I am trying to configure a new 2960 POE switch, but seem to me the int fa0 is layer 3 interface. Is any way we can convert it to a switchport, so we can connect it to other switch in trunk mode?
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Aug 20, 2012
i try to implement layer 2 qos in 2960. when i complete to configure the switch, i want to test the qos.PC1 conect to switch port 1,PC2 conect to switch port 2 . PC1 is source teminal. i use skydata.exe and FTP for the test.
when use the skydata ,the PC2 speed can reach 10mbps.when use the FTP , the PC2 only can reach 1.2mbps. why?
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Apr 29, 2012
I can use Putty to SSH into my new switch (Directly connected to my laptop with ethernet cable), but I cant log into my switch.
Sent username "admin"
admin@192.168.251.1's password:
Access denied
It doesnt like my password, but I have only set 1 password (king) on this switch. I've configured 3 other switches with SSH and had no problem. Been trouble shooting for awhile and It'd be great if I could have a 2nd set of eyes take a peek, Also, my running config is attached.
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