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The Router Is Unable To Access The Internet After Connecting To The Switch
Jun 08, 2018

The analysis is as follows:

Your router at the moment is the gateway

When you say that the MAC address has changed, you're saying that the MAC in the gateway has changed

Situation 2:

You say you can't connect to the Internet if you plug in the switch

What is the difference between a pluggable switch and a non-pluggable one?

A switchboard or hub indicates that the node is not at the end of the local network, so there are conditions for bridging loops

Do not check the switch, direct connection to the computer, so generally not

There is a possibility of bridging loops

According to the above analysis:

First of all, check the first situation:

First, verify that the gateway is a real MAC

Then do not plug in the switch, in the network computer

Arp -a

Save the arp table cache on the host

Then connect to the switch, on a computer that is not connected to the Internet

Arp - d

Clear the ARP table

At this point: any address within the ping network segment, such as the gateway

After ping, arp-a

Displays the current arp table

Compare this ARP table with the previous ARP table

See if the gateway's MAC is consistent

If not, arp minus s

Bind the gateway to the real MAC and test whether you can access the Internet

If not

Consider the second case:

Bridging the loop, default Windows host network card properties

The host is guaranteed to be a terminal host

But the network card property might be considered to have "bridge" set

Or the cable may be redundant to form a loop

If your switch is configurable, check the MAC

But if the loop is already happening, the switch may be too tired to climb down


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