Protocols / Routing :: Machine Refusing Untagged Ports
Mar 14, 2013
Our College uses Ethernet connexion for its students with the IPv4 Address of each machine configured using DHCP (not manually). In order to prevent students from playing certain online videogames some ports are blocked for all machines on the network, but they can be manually untagged (ie for competitive play). The problem occurred when we tried to untag the ports to allow online games on this machine. After the allowed ports were modified, the machine refused to assign an IP adress to itself - no matter how many times we try to renew the DHCP Lease. Restoring the previous set of allowed ports fixes the problem, but doesn't allow for online play.
config: OS X 10.8.2 with nothing fancy. Other machines on the network do no experience this problem.
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Aug 6, 2012
I have two questions for a Cisco 2960 (WS-C2960-24TC-L)
1. I am working to setup a few Cisco 2960 switches for HP iLO access to our servers. We are going to segregate the iLO network (VLAN 40) from the data network (VLAN 10) by using a different VLAN. All of the HP servers will be configured with static addresses. My question is, how do I set all the ports to VLAN 40 so that untagged devices will automatically go onto VLAN 40? I don't want to have to configure the VLAN on each iLO port on the server. I tried to set the port to: "switchport trunk native vlan 40", but that didn't work.
2. Also, how do you access the web GUI for these switches? I get a login box, but putting in the enable password doesn't work. I have the following commands in the config: [code]
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Mar 7, 2013
I have 5 VLAN's setup in the sge2010. I have one port (uplink for the network) that I want everyone to see. But have separate VLAN's for different departments as to keep them all separate. Everytime i try and Untag that uplink port, i lose my untag in the original VLAN it was tagged in, and it changes to excluded.
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Feb 17, 2013
I am running a websever on virtual machine on ubuntu .how can i forward all traffic coming to my ip to virtual machine which is 192.168.1.4 on my LAN.here are my configs.
OS - Windows 7
Router - DLink
Virtual machine network Setting - Bridged adapter.
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Feb 7, 2012
it is possible to let cat3750 or 2960 ports which only allow machine on network which it use dhcp, not static ip? if so, how to configure it?
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Sep 8, 2012
I need to configure a subinterface eg g0/0.1 and g0/0.2 with a untagged VLAN for each subinterface on a Cisco 2821.
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Feb 6, 2013
I am trying to setup the QoS for my router, and want to bump up the priority for streaming video such as Netflix, Youtube, and others... I am not certain what specific protocols and ports are used for streaming though. Googling Configure QoS for Youtube comes up with tons of long winded articles that never get to the point...
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Jun 4, 2013
Where can I find a document that list and describes all the PPS associated with CiscoPrime LMS 4.1 and later?
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Mar 6, 2012
I see people configure HP Switch using command like "tagged and untagged". Example: vlan 10 tagged 5. I don't really see this command on Cisco Switch. What does they mean?
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Jun 8, 2012
We have just swtiched router and network in out house and upon doing so my computer can no longer connect to the internet, the other two in our house can. The computer can detect the network but the information it has about it is wrong, the security type and radio type. (See picture) it is a Billion Router and works fine on all other computers, we thought at first the problem was with Hamachi but after uninstalling it the problem was not fixed.
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Jun 7, 2011
After cleaning the infection, none of my browser will work.Firefox display this message: "The Proxy Server is Refusing Connection".IE displays an error as well.I can't even use Steam's (game client) browser to see what games they have available but I am able to sign on.I am sure my internet is working because I am able to log on to my Instant Messaging Program and chat with freinds and use a VoIP software to talk with friends without issue.The problem is happening on my "regular" windows account.My administrative account seems to be problem free as I am able to browse the net like I had before the infection.
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Aug 2, 2011
I have a strange error on my home network that I cannot find a solution to.I have an Huawei SmartAX MT882 from TalkTalk acting as a modem connected to a D-Link DSL-G624T acting as a router/switch. Connected to the D-Link I have a Windows 7 Pro machine (64-bit, SP1) and an XP (home i think) machine (sp 2 i think).The SmartAX modem is set up to perform DHCP and DNS relaying and the D-Link has DHCP turned off and DNS relay turned off.The Win7 machine can access the network, get an IP address and access the internet without problems, regardless as to the status of the XP machine.The XP machine can access the network, get an IP address and access the internet with no problems ONLY of the win7 is powered up. When the win7 machine is off, the XP machine seems to drop about 25% of the ping packets between it and the D-Link router and has no internet access (because of this i assume). [code]
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Jul 20, 2011
New Win-7 machine set up. I used the printer set-up wizard to install a networked printer in the new machine with absolutely no problem. Proved it would print from that machine.Now, I get a call informing me that her old XP machine, which had been printing to the network printer with no problems, will no longer print.Documents go into the print queue, but they don't get printed.No error messages show up.I did some messing around via remote access, and finally removed the printer with the intention of reinstalling it.Scanning for network printers turned up several redundant instances of the same printer with different names. Some are identified as "invalid" some a "access denied". Bottom line. I can't get any of the selections to install.On the Win-7 machine I did find a window that indicated that the printer is designated as being shared, but I didn't explicitly set it for sharing when I installed it. Also, I somehow got to a window that told me that for printers that were to be shared with other versions of windows I could optionally install drivers to support such machines. Didn't have the driver disk handy and took the window down. Now I can't even find it again.I need sorting this all out.Part of the problem is that out there in "network land" there are redundant remnants of previous installations that are being remembered inappropriately.
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Dec 21, 2012
I have migrated my ACS data from 4.1 to 5.1 and everything is working fine to test the connection I have configured a switch to get the authentication from the new Tacacs server, using my old username and password..i got in perfectly but when the switch asked my for enable which is the same password, it refused the password.(I have unchecked the <use a different password for enable> option) I deleted my switch from the Tacacs to enter locally, I went in with no problems..i thought that the problem may be from the old configuration.so I created a new username and password to check, and the problem still exist.
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Aug 17, 2012
The original network had a Zylex router, Netgear Switch. There was 2 pc's, one XP and Win 7. There is also 3 tills connected too. There is VPN network connected too. This emits a wireless signal to connect to a scanning gun and is also used to administrate the entire network. I was told by the Administrator of that network that it shouldn't interfere with the wifi network.
The job I was requested to do was to install 3 new wall plates as the Win 7 pc was using a Belkin wireless adapter. There was 2 put inside the office where the XP and Win7 pc's are located. The 3rd was just outside the office.
Now all the ethernet connections work 100%. The wifi is another story though. It will show up in the connect too, when you try connect it will disappear/no response from AP/connect then disappear, these are random too. No order to when each is error is displayed. Even when I put in another router the exact same issues happen.
I have tried to connect to both routers wifi when it wasn't plugged into the switch. Just the router's turned on with no cables plugged in separately of course, no joy same issue with both.
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Aug 22, 2011
I couldn't find a section for the 651.
Alright so I have an SSH server running on my network. I can successfully connect to it from a local computer using the server's internal IP address, AND I can connect to it from a remote computer using the server's external IP address (it's properly port forwarded).
However, when I try to connect to the server from a local computer using it's external IP address, I get a connection refused error. Is there something I'm missing?
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Sep 15, 2012
The original network had a Zylex router, Netgear Switch. There was 2 pc's, one XP and Win 7. There is also 3 tills connected too.There is VPN network connected too. This emits a wireless signal to connect to a scanning gun and is also used to administrate the entire network. I was told by the Administrator of that network that it shouldn't interfere with the wifi network.The job I was requested to do was to install 3 new wall plates as the Win 7 pc was using a Belkin wireless adapter. There was 2 put inside the office where the XP and Win7 pc's are located. The 3rd was just outside the office.Now all the ethernet connections work 100%. The wifi is another story though. It will show up in the connect too, when you try connect it will disappear/no response from AP/connect then disappear, these are random too. No order to when each is error is displayed. Even when I put in another router the exact same issues happen.I have tried to connect to both routers wifi when it wasn't plugged into the switch. Just the router's turned on with no cables plugged in separately of course, no joy same issue with both.
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Apr 29, 2012
I have a network problem. My windows 7 machine is not detecting win xp machine whereas win xp machine is detecting win 7 machine. They are in the same workgroup named Home. And the networking system is set to work. I have left the homegroup I was previously in. I enabled file sharing for devices that use 40 bit and 50 bit encryption. On XP I have enabled NetBios over TCP/IP. File sharing is enabled on both computers. I think it's something obvious as both instalations on different computers are really fresh and both windows haven't been tampered with.
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Aug 20, 2011
why the WAN protocols like Frame-relay, HDLC and PPP are called Layer2 protocols?What is the address scheme they use?
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Dec 18, 2011
We have one machine running an application accessible remotely. We have cisco877 router, and static ip to access the application remotely. We recently done an update of out application software which has changed the access port/link to application.
since we update the software We can access the application internally through local ip but is not accessible through WAN with static ip, as the port no has changed.
I not having much knowledge of networking don't know what changes should be made in router so it direct the traffic of static ip to the machine running the web application, as before.
I tried looking for clue in router through its SDM Express interface, but no joy.
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Apr 5, 2011
I have got a PC at work (Windows XP Pro SP3) that is on two networks with the IPs 10.20.30.167, subnet 255.255.255.0 (internet enabled) and 10.0.0.20, subnet 255.255.255.0 (no internet). On the 10.0.0.X network there is a gateway with the IP 10.0.0.200 allowing access to another network; 192.168.60.X, subnet 255.255.255.0 (no internet). I have added the route on my work PC to access the 192.168.60.X network via this gateway and I can access all PCs on all three networks from this PC.Now, I am using LogMeIn Hamachi so that I can access the networks at work from home. The PC at work is the 'gateway' PC on the Hamachi network. When installing Hamachi it created a new network connection and bridged this connection with my 10.20.30.167 network adapter to allow access to the 10.20.30.X network from an external PC when connected using the Hamachi VPN connection. I have manually configured my Hamachi connection on my PC at home to the IP 10.20.30.169, subnet 255.255.255.0, with the default gateway set to 10.20.30.167. I can ping all computers on the 10.20.30.X network from my PC at home.
I then added a route on my PC at home for 10.0.0.X to go via 10.20.30.167 (the 'gateway' on the Hamachi network). I also enabled IP forwarding on the 'gateway' PC (my PC at work). I can not ping any PC on the 10.0.0.X network from my PC at home apart from 10.0.0.20 (the other NIC in the Hamachi gateway PC) and 10.0.0.30 (another PC on the 10.20.30.X network that is also on the 10.0.0.X network).Now, with IP forwarding enabled on the Hamachi gateway PC I would assume after adding the route on my PC at home for 10.0.0.X traffic to go via 10.20.30.167 that I would be able to ping all PCs on the 10.0.0.X network...I also tried adding a route on my home PC to send all traffic for the 192.168.60.X network via 10.20.30.167 which has a route via 10.0.0.200 to the 192.168.60.X network, but this also did not work.I then tried adding the 10.0.0.20 network adapter into the network bridge that the Hamachi connection made, also keeping both IPs (10.20.30.167 and 10.0.0.20) on this network bridge by adding them into the 'IP Settings' in the 'Advanced TCI/IP Settings'. I also added the 10.0.0.200 gateway for good measure. I still cannot ping any PC on the 10.0.0.X or 192.168.60.X networks from my PC at home.
I have also added the route to the 10.20.30.X network on a PC on the 10.0.0.X network to go via 10.0.0.20 and tried pinging a PC on the 10.20.30.X network but this also has not worked. Also setting the default gateway on a PC on the 10.0.0.X network to 10.0.0.20 does not allow this...Surely bridging the networks 10.20.30.167 and 10.0.0.20 on my work PC would allow another PC on the 10.0.0.X network to access the 10.20.30.X network after adding the route or setting 10.0.0.20 as the default gateway?
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Aug 3, 2012
I have a 2911 router inside our network with both DHCP and DNS enabled. Everything works fine except since we use this router we are not being able to go to the network neighbourhood in Windows and look up machines by name (or typing \diskstation for example). Connecting by IP works fine but not by local machine names.
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Apr 3, 2013
I want to buy the CISCO C819G-4G-G-K9 M2M Router. Studying the characteristics as I always do, I discovered (incredible for me!) that so a sophisticated and expensive router has not the WLAN. Nevertheless, to have the Wi-Fi connection is essential for me.
which is the instrument or machine of Cisco that I must use to connect to the CISCO C819G-4G-G-K9 M2M Router and to have the WLAN 2.4/5 GHz? Will this be possible?
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Jan 8, 2013
I am working on Cisco 3550 switch on a certain requirement. I have got an access point connected to the switch and few mobile phones connected to the access point. I get the list of mac addresses connected to the switch ( Both access point's mac address & the clients addresses) by "show mac-address table dynamic" command. However, i am unable/confused to get the output of the following scenarios:
1. I would require to export the mac address from the switch to the local machine in any format (May be by using an SNMP tool, if available) so that the same needs to be used in my C# for development.What would be the way for the same ?
2. The mac address in the mac address table doesn't get updated dynamically. (Eg Scenario: A wifi client gets connected to an access point which inturn is connected to the switch, the mac address of the client shows up in the switch table. However if the client is disconnected, the client's mac address would still be displayed in the switch table )
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Sep 2, 2012
I have two computers. Computer A is connected to the internet through GSM network. Computer A also have NIC adapter which is connected to local network with IP 192.168.33.10/24.
Computer B in connected to internet with DSL connection.
On both machines I use TeamViewer to make VPN secure tunnel between this two computers. Computer A gets IP:7.200.100.2 Computer B gets IP:7.200.100.3
How can I access from computer B to specific device with IP 192.168.33.250 which is on local network of computer A?
Is it possible to route traffic from VPN to other local network, or it is some possibility to use port forwarding from VPN connection to specific IP address on the local network to specific port number?
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Apr 5, 2013
We have a PPPoE DSL link with a dedicated IP providing by a small ISP(ISP A) in Canada. We are having trouble reaching a small group of IPs in the US to be able to access some client resources.We have eliminated all possible local issues by removing the firewall and making a direct connection to the ISP. We have also had numerous tests prove successful when we use other local ISPs.
Trace routes show that the packets get dropped a few hops from the destination on a US ISP(ISP B).The routes even appear to be very similar to the other ISPs we tested. We escalated to ISP A and they say that everything is working properly on their end and the problem is with ISP B. They claim they "have no partnership with ISP B and therefore cannot create a ticket to get it resolved". I tried calling ISP B but I get nowhere because I am not a customer of theirs.
My solution is to give ISP A the boot, but management has denied that request because of the amount of effort required to switch over. How I can escalate this? Is there anyway to go over and above the ISPs?
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Sep 5, 2011
I have an skill exercise with 4 Routing Protocols Default Route,Static Route,Eigrp, Ospf. I have about 6-7 routers, and each of them has an routing protocol. But the problem is the Main router INTERNET, which it has to use Static in a direction, and default in the opposite path. This is the scheme of routers and how the r.protocol have to be configured.
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Feb 26, 2011
The websites I usually go on now have some type of error page when I go to them. So far it has happened to 2 of them though they might not be related.
Here's what the page says:
Site 1- Valenth
Quote:
Warning: mysql_connect() [ function.mysql-connect]: [2002] Connection timed out (trying to connect via tcp://ec2-184-73-84-14.compute-1.amazonaws.com:3306) in /var/www/valenth.com/include/database.class.php on line 25
[Code]....
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Sep 4, 2012
i've had this internet problem that has been going on with a wireless laptop i've had since april. it only happens on this computer, and i've tried many solutions. occasionally, i will try and go to pages on google chrome and an error pops up that says "this webpage is not available." when i play games that are online, they get disconnected as well. i've added google chrome and my other browsers to the firewall list and i've also changed the DNS server. when i use the troubleshooter it says something like "router, or modem is not connected to the internet. i've even downloaded the "fix it" program and it detected no problems
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Jun 1, 2011
I can't get RDP to work on a specific computer.I've already set it up on the router, know the IP address, and I can get it to work great with the server, but the workstation we want it to go to won't accept it.I checked, it's set to allow RDP, the firewall exception was setup, also turned off the firewall completely, removed the antivirus software, checked TCP/IP filtering on the lan connection, even changed the listening port and still nothing.
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Jan 4, 2012
Problem with a conflicting IP address. Basically on a normal running day my wireless is switched on and connected perfect to my internet, however if i want to download any large files i plug my Ethernet to my laptop and disable the wireless from my laptop, instantly then the LAN connection kicks in and im on the internet again as i find download speeds are faster through a LAN. However today my wireless is fine but the second i switch to LAN the ! symbol appears and a message says their is an IP conflict.
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Aug 17, 2011
I've been timing out via any FTP client, including FileZilla, FireFTP, and a few others. I even downloaded a few just to see if I could connect with other clients.I contacted my host who can't recreate the issue on their end. I contacted my ISP who instructed me to use my command prompt in order to connect to their server, and that of mozilla. Both times I was able to connect via the command prompt.I don't understand what's going on.If I can connect to the sample sites that my ISP gave me, why can't I connect using an FTP client any longer. What possible change could have been made to have caused that disconnection that happened a few nights ago, and is now causing the timeouts I continue to receive?
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Apr 12, 2011
How can i actually change my ip...tryed those cmd things but nothing works. Ineed to change ip somehow.
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