The problem of using a cat to connect to the switch to access the Internet, why can t the switch und

The cat is directly connected to the switch and cannot share the Internet, unless you take a PC out to do soft routing, if you can do soft routing, you will not ask if you don't set the IP.

Any host that uses the network must have an IP, and the IP must be set, but most of the time we choose to let the gateway automatically set the IP instead of manually setting the IP, and the choice of automatic or manual depends on what permissions you want to give to the following machines.

A gateway is the host that is used for NAT sessions, usually a router, or a host that does soft routing.

DNS asks your local broadband provider.

It is recommended that you connect a 4-port or 8-port router to the back of the cat instead of a switch.

Go buy a TP-Link 4-port or 8-port router, 4-port 90 is about the same. Then set up automatic dialing in the router, tp-link is a Chinese interface, after the first login, the setup wizard will pop up! You can follow the settings above, it's very simple!

In this way, the router has 4 output ports, which can be connected to the switch, or directly connected to the computer, and the computer can automatically obtain the IP address and DNS, no need to set up!

IP addresses and DNS are automatically obtained.

If multiple computers need to form a local area network, you can set the IP address to the same network segment.

Use the "ipconfig all" command to check it when you go directly to the Internet.

The switch under the optical modem cannot access the Internet is caused by the wrong setting, and the solution is as follows:

1. Open the desktop Internet Explorer, enter enter, and enter the routing login interface.

2. After logging in, various setting options will appear.

3. In the status, you can see whether the China Unicom network you are connected to is registered and you can access the Internet normally.

4. Network-broadband configuration-broadband Internet access setting; Enter the Internet access password here.

5. Network - WLAN configuration - basic settings; The name of the SSID, here is the wireless name used, you can change it to your favorite name.

6. Network - WLAN configuration - security settings; WPA pre-shared key, set the Wi-Fi password.

1) Check to make sure that the network topology is connected correctly and the device indicators are normal.

2) Check whether the computer network parameters are correct, and make sure that the computer is directly connected to the router and can access the Internet: this can eliminate the restriction of the router on the computer's Internet access.

3) Try to log in to the router management interface and check whether the management address of the switch conflicts with the router gateway.

4) Check whether the browser is set up with LAN**, try to ping the gateway and the external domain name, if not, continue to check.

If these are all right, then you can locate the problem at the PC and the switch, which can be located from the following steps:

5) Check whether the PC connection port on the switch can communicate with the router connection port, and exclude the switch setting port learning, port and MAC address binding, VLAN (whether the port is in the same VLAN as the router cascade port), ACL settings and other restrictions.

6) Check whether there is ARP spoofing in the intranet, do a good job of two-way binding between the computer and the router IP and MAC, 7) If none of the above is set, the device reset is used as a fool switch, if you can't access the Internet, it is likely that there is a problem with the switch hardware, contact the office or dealer for detection.

That is the line problem, find the operator to solve. The optical modem cannot be shut down, and the old switch optical fiber is easy to break.

What you call the optical modem: 1 is to determine whether the ONU optical terminal or the optical transceiver; 2.The broadband access mode is PPPOE, static IP or LAN LAN.

ONU is a PON terminal device, under normal circumstances, it is no problem to correctly access the switch to access the Internet and divide multiple computers at the same time, and the operator will not object, and will also do one number in the PPPoE account processing to achieve multiple simultaneous dial-up Internet access on one line; If it is a static IP address, it needs to be processed in routing mode and connected to the Internet through the switch sub-platform.