Question about NetGear 24-Port (fsm726s&mr814) Networking Switch

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No longer pinging...

Hello,
We have a network of 3 computers and several printers.  Suddenly - we think after a power failure - our server would no longer ping either of the other 2 computers, nor would it print.  Oddly, the other 3 computers can ping this server's IP address.
Any ideas?
Thanks,
Jime

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Check the cables, it's possible that a wire used for the comm. from the server to the switch/router is not making proper contact or is broke...

Posted on Jun 27, 2008

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Why Addresses in the IP Address Pool on a Switch Are Exhausted When the Switch Functions as a DHCP Server and It Has a Few Clients?


If the IP address pool has much more resources than needs of clients, the following two reasons may cause address exhaustion:
1. An attacker keeps changing the CHADDR field and sending DHCP Discover packets to exhaust addresses. If so, contact Huawei engineers to deploy DHCP snooping to protect the IP address pool.
2. The DHCP server ping function is enabled on the DHCP server. This function tries to ping the allocated addresses before responding to DHCP Offer packets. If a client responds to any ping packet, the DHCP server considers that there are address conflicts and addresses are exhausted. To solve this problem, two methods are available:
1. Capture packets on the ports connected to the DHCP server. If a client responds to ping packets, prohibit the client.
2. Disable the DHCP server ping function using the undo dhcp server ping packet command.
3. Such as S5700, S6700

Aug 01, 2016 | Networking Hubs & Switches

Tip

Set up a home office LAN which access internet through USB wireless gadget


The following networking job I have done in this Lab. It is enough for a small office to access or transfer file Printing and access of shared Internet in different type of operating system.

We have recently set up a home office (small laboratory) LAN. All the computers access the internet through a USB wireless (CMDA) dongle. The USB stick is Huawei EC168C and internet service provider is Reliance Infocom (India). But any USB internet dongle can be use to share internet in a LAN in the following way. And you don't need a router for that. In the areas where ISP cannot give wire line internet connection this type of USB wireless sticks are really helpful for home office.


Basic LAN Connection:

Here this lab has 4 PCs. One Windows XP, another Windows Vista starter and two RedHat Linux server systems. Here in this lab I have done the basic LAN connection using cat5 cable & RJ45 connector and an 8 port hub. I have connect the two windows based OS. Using cross cable I have connected two windows system with the hub. Then I put static IP address in Ipv4 of TCP/IP. After that I set workgroup name to join in a workgroup in windows PCs. Then I tried to ping the systems, and it was pinging. Then I have setup a home or small office network in both windows system. That I have enabled the Printer sharing. After that I can share file, data and printer through the system gateway.

Now I have to connect other two Linux PCs in this network. With same cross cable I have joined the both Linux system with the hub. Then to detect the Ethernet device I have put down "DEVICE=eth0" entry in /etc/sysconfig/network-scripts/ifcfg-eth0 file. Then I set IP address in Ethernet device in network configuration in graphical mode (or System-config-network in text mode).After doing this job I restart the network service with "service network restart" command. Then I am trying to ping the systems to one another, And It was pinging.

Now Linux system can access with each other and files also shared through SSH, Telnet,FTP using process and command.

Linux Configuration:

I have configured the Linux system in the following way. First I have set the host name in /etc/sysconfig/network file by VI editor. Next I have edit /etc/sysconfig/network-scripts/ifcfg-eth0 file with "Device=eth0" to detect the Ethernet device. After that I have put the IP add in network configuration file and Restart the network service. To keep the eth0 on permanently I also use the chkconfig command.

After doing this job File sharing can be possible through network file sharing (Nfs). I have install Nfs package & shared the nfs dir by editing exports file. Then I am trying to automount the NFS dir by automounting process. So that I put automounting entry of nfs file in fstab file. After that it's automounted in other system's mount location.

Windows & Linux Networking:

Through basic LAN both OS can only ping each other. To share file or data samba server (a client server in Linux) must be configured in Linux system. So I Install smb rpm package from yum repository. Then I have Configure the samba/smb.conf file. I put the Workgroup name on Workgroup column of samba/smb.conf file. Then I Set the network IP without host to route in network in Host allow column. At last I put down all details of Samba dir, users at the end of the configuration file set the samba password. After that I restart the samba demon to up the samba server. Now files can shared through samba server. In windows I Set the workgroup name pairs with samba server and also set username and password same as samba server. Now I trying to send or access file through samba in both OS and it happened.

USB Net Connect:

Here in this lab workers are use internet from an Usb net connect. So it must be shared in Network. It is too fast so shared internet can be access easily. In Windows XP system I connect the USB netconnect & share it in network. IF all the network setting is ok then all the systems can access shared internet through gateway. Here all users use this shared internet now.

Access of Another System:
VNC Server & Viewer is software through which we can access of another system easily. I just install the software & set the password. Then I run the vnc server. After that I Put the IP add of vncserver from vncviewer of another system and type the password & start access the vnc server system. It can be access form WAN also. I just Run the Vnc server and connect the internet and I got a Wan IP add provided by ISP.

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to do this you need CROSSED ETHERNET CABLE

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1 Answer

High ping


Question, why are you using so many different routers? Sounds like you are causing a bottleneck in the network.

This is how I have my network.

Modem ---- PFSENSE Firewall (currently my DHCP Server) ------- Cisco Switch ------ Patch Panel ------- out to my Servers, computers and one wireless router. See only one machine is managing my IP addresses.

Buy a patch panel and run wireing to all the locations in the house or just run wireless.

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1 Answer

Can I create a closed hub lan using MS Server 2003 and a client?


try going into my network places and on the left pane go to set up ahome or office network make sure you do this on each computer and the workgroup name must all be the same on each computer you want to be in that network.

Nov 19, 2008 | Networking Hubs & Switches

1 Answer

Networking


The computer you are conserned about most likely doesn't receive DHCP, but either manually configured or gets the APIPA. The best way to check if that is the case to run ipconfig /all in command prompt.If adress starts at 169. search for break in line. If it is some manual configuration change it in TCP/IP in network connections properties. Have fun.

Jul 01, 2008 | Trendnet TEG-224WS 24-Port Ethernet Switch...

1 Answer

Hawking HFS5t


Try resetting the switch back to its default configuration. It sounds like you have a routing issue within the switch causing your printer not to be seen by your pcs.

Can you connect a pc to the switch just to see if you can ping your printer from there?

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1 Answer

Computer no longer recognizes server


Assuming this problem is for ANY computer, not just the one.
If you still have internet access through the device, but cannot see network shares, your Samba server is down. If a full restart does not solve the problem, you need to learn Samba/Linux -or- you need to re-image the drive to factory defaults.

AnOldMan

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In order to get to the Internet, a computer must have proper IP connectivity. Lets start by troubleshooting IP connectivity in your office and see where the breakdown is. Open a command prompt on a machine. This can be done by going to Start ->

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