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Solved: Network Hub Issues

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Thank You so much for your help... This grouping of ports is called a Virtual Local Area Network (VLAN). Join over 733,556 other people just like you! Too much distance between the devices on the network. http://sumolinux.com/solved-network/solved-network-adaptor-vs-network-controller.html

If this is broadcast traffic, any device in the same broadcast domain as the offending network interface card may experience problems, including slowdowns. If you want more information on cabling specifications, read The Siemon Company’s white paper on "De-Mystifying Category 5, 5e, 6, and 7 Performance Specifications."Final wordsWhen your network experiences a slowdown, make DNS If none of 1-6, above, work, it's worth changing the Domain Name Server (DNS) settings. Remove hosts from the LAN. https://forums.techguy.org/threads/solved-network-hub-issues.311176/

How To Troubleshoot Network Connectivity Problems

EtherChannel is an easy way to aggregate bandwidth between critical networking devices. If possible, identify the communication media the telephone company is using (microwave, satellite, and so on). For fiber connections, make sure the transmit lead of one port is connected to the receive lead of the other port, and vice versa; transmit to transmit, receive to receive, does Because it is not possible to ensure that every user has either a 10Mb, a 100Mb Ethernet, or a 10/100Mb card in their laptop, the switch ports that handle these connections

Where the values do not match, there is an FCS error. TechRepublic Search GO CXO Cloud Big Data Security Innovation More Software Data Centers Networking Startups Tech & Work All Topics Sections: Photos Videos All Writers Newsletters Forums Resource Library Tech Pro That is because SwitchA ports are still disabled. Smokeping Look at the power-on self-test (POST) results from the switch to see if there were any failures indicated for any part of the switch.

There is a benefit to a physical loop in your network: it can provide redundancy. Common Network Problems As with other FCS errors, alignment errors most often result from noise on the cabling, although hardware problems in network interface cards or other network hardware can also cause them. Alignment errors Ethernet frames should be comprised of complete bytes -- octets of bits. Also read: What Automator can do for you and Automator Workflows How to troubleshoot WiFi problems How to show hidden files and folders in OS X How to generate SSH keys

One of the most common causes of performance issues on 10/100Mb Ethernet links is when one port on the link operates at half duplex, while the other port operates at full Network Monitoring Tools Wait a few seconds, switch it back on again, and then try connecting again. 5. Understand the meaning of the "a-" prefix in the Duplex and Speed status fields. The receiving node uses CRC to calculate its own FCS field value; if that number matches the one received, the frame is good.

Common Network Problems

The show port 1/1 command displays the status of ports 1/1 on Switches A and B. http://www.tomshardware.com/forum/44808-42-samsung-smart-network-issues Please login. How To Troubleshoot Network Connectivity Problems Troubleshooting Port Connectivity Problems If the port does not work, nothing works! Broadcast Storm I have experienced a “junk-spitting” NIC more than once.

Before you jump to conclusions, try to verify in a structured way what works and what does not. weblink If necessary, set the IP address and netmask with the following commands: Command> set ether0 address Ipaddress Command> set ether0 netmask Ipmask If you are using IPX verify the following: The Sometimes ports are damaged by Electro-Static Discharge (ESD). A broken fiber cable or other cabling/port issues can cause this one-way only communication. Wireshark

Switch-A (enable) set port channel 2/1-4 on Port(s) 2/1-4 channel mode set to on. Try different ports or modules. 5. Verify that the ports to be grouped have the same settings. navigate here If the problem is with an iOS device, go to Settings, then Wi-Fi and move the slider to the off position.

It’s an incredibly flexible and useful tool that can help you locate problems in your network, and also educate you about the kinds of traffic you've got traversing your wires. Tracert Configuring EtherChannel Switch-to-Switch Connections on Catalyst 4000/5000/6000 Switches EtherChannel allows multiple physical Fast Ethernet or Gigabit Ethernet links to be combined into one logical channel. BNC connectors often come undone.

Single mode fiber generally reaches 10 kilometers, and multimode fiber can usually reach 2 kilometers, but there is the special case of 100BaseFX multimode used in half duplex mode, which can

Verify that EtherChannel is supported on the ports. If you turn the trunking mode to "on" (as opposed to "auto" or "desirable") for one port, and the other port has the trunking mode set to "off", they are not If something changes in the network, the router can tell the switch to erase its layer-three cache and build it from scratch again as the situation evolves. Tcpdump Connect the port in question to another port in the same switch just to see if the port links up locally.

When we use the word layer, we are referring to the 7-layer OSI model. If the status light on the switch flashes orange, this usually means there is some kind of hardware problem with the port or the module or the switch. Another common threat is a malware-infected computer, which can send a barrage of e-mail or attempt to replicate to computers on your LAN or across the internet. http://sumolinux.com/solved-network/solved-network-only-goes-one-way.html If the destination MAC address of the received frame is the broadcast address (FFFF.FFFF.FFFF), the frame is sent out all ports that are in the same VLAN as the received frame.

Verify that you are using T-connectors on all BNC Ethernet connections. On certain modules (WS-X5201 and WS-X5203), you cannot form an EtherChannel with the last two ports in a "port group" unless the first two ports in the group already form an Incorrect cables are installed. Use show S0 or show W1 to determine that line errors are present (see page 1-2), and follow the steps in "Diagnosing Line Errors" on page MSwhip replied Mar 6, 2017 at 9:13 PM Loading...

Connect the router to the cable modem through the ethernet connection. This includes the ports on the other side of the link, as well as the local ports. This message about a duplex mode mismatch is displayed on Switch A after the speed on port 1/1 was changed to 10Mb. When you enter the set port speed 1/1 10 command caused the duplex mode on port 1/1 to be configured as if the command set port duplex 1/1 full had also

Checking 10BaseT (RJ-45, Twisted Pair) Hardware Use the following procedure to check 10BaseT Ethernet external hardware. Another cause of inactive ports is when the VLAN they belong to disappears. Sometimes this causes the problem to disappear; this is a workaround, not a fix. Different media are affected by weather conditions such as snow, lightning, and fog.

Your data center UPS needs are dependent on a variety of factors. If you have link and the ports show connected, but you cannot communicate with another device, this can be particularly perplexing.