Shulou(Shulou.com)06/01 Report--

Because of the launch of the WMS system, the company warehouse has transformed the original wireless network, most of the AP has been replaced by Huawei's 4050DN Magazine AC using 6005-8, and the new POE switch is S2700-26TP-PWR-EI. Because WMS uses a wireless printer and connects through a wireless network connection, layer 3 roaming is enabled on Huawei's AC by default, resulting in the printer bound by PDA unable to obtain the specified IP, but to another network segment. Next, we need to solve this problem:

First, turn off roaming

Open the wireless AC controller, find the configuration-AP configuration-AP group configuration, adjust layer 3 roaming to OFF state, apply, and save the configuration.

Then it seems that the task can be completed, but the WMS of the department is also worried that there are still problems and suggests merging the two warehouses into a single network segment.

Second, modify the configuration to change the network segment of the warehouse to vlan 66.

1. Create a VLAN on the POE switch in the warehouse

Vlan 66

two。 Allow VLAN66 to pass through the port that connects to AP

Interface Ethernet0/0/1

Port link-type trunk

Port trunk pvid vlan 100

Undo port trunk allow-pass vlan 1

Port trunk allow-pass vlan 66 100

3. The interface between the POE switch and the layer 3 switch allows VLAN66 to pass through

Interface GigabitEthernet0/0/2

Port link-type trunk

Port trunk pvid vlan 100

Undo port trunk allow-pass vlan 1

Port trunk allow-pass vlan 2 to 4094

#

4. In the VAP template of AC, change the business VLANID to 66

5. Next, restart the AP located in the employees group to take effect quickly

After restart, 2 of the 20 AP are displayed as fault, and the other AP is working normally, and the corresponding IP address of the VLAN66 can be obtained.

Third, locate the fault AP, troubleshooting

1. Which AP is the fault (ID) and what is the MAC address?

Click this step to get the ID and MAC related information of AP. The faulty AP is as follows

63 c4ff-1ff8-45c0

74 002e-c701-cd60

two。 Combine tables and drawings to locate the physical location of the AP

The table includes information such as APID, MAC address, physical interface of the connected switch, and so on. This table should be ready after AP has been deployed.

The actual environment on my side is to make two tables, one recording the information of AP and the other recording the information of POE switch interface. Together, these two tables include the identification number, and the layout of CAD includes the location of the AP installation of the logo. In theory, it will soon be able to locate the physical location of AP.

3. Problems in real production environment

But as soon as I finished checking the table and then Telnet to the switch, I found a tragedy. The corresponding relationship between the physical port of the switch and AP was completely deranged, which made me get upset. Then I thought about it, it should be the last time the supplier changed the equipment, and after I finished the form, they changed the equipment and plugged in the network cable.

Then you can only Telnet to the switch, display macaddress ether 0Action0Universe 1, such an interface looks at the MAC address of the Up interface. Through the network management platform, it is found that the interface of Up is as follows

The number of Up interfaces can correspond to the number of AP, indicating that the interfaces are all Up, and then you need to check the MAC address.

The ports that did not learn the MAC address are ethernet 0Uniplet17 and 0Universe 20Show, when the MAC table is empty.

Display mac-address Ethernet 0/0/17

MAC Address VLAN/VSI Learned-From Type

Total items displayed = 0

The ports where the Mac address exists are as follows. The MAC we need to find is the MAC of the VLAN where the PVID of the POE switch access port is located, and this MAC is the MAC address of the switch, while the MAC of the business VLAN is the client PC and the MAC of mobile phones and PDA.

Display mac-address Ethernet 0/0/7

MAC Address VLAN/VSI Learned-From Type

0008-22f1-3b2f 66max-Eth0/0/7 dynamic

C4ff-1ff8-8f00 100max-Eth0/0/7 dynamic

Total items displayed = 2

Improve the original two tables according to the following method, locate the port of the switch, and locate the physical location of the AP through the layout diagram.

3. Solve the problem

a. To be on the safe side, I will turn off and turn off the ethernet 0swap 17 and the ethernet 0Accord 20, and the 17-port switch will be ready to go online. As soon as the 20 port is opened, it will automatically be Down.

b. By looking at the interface information of the switch, it is found that there are a lot of errors in the interface entry direction of ports 17 and 20, so I think there may be something wrong with the network cable.

InUti/OutUti: input utility/output utility

Interface PHY Protocol InUti OutUti inErrors outErrors

Ethernet0/0/1 down down 0 0 0

Ethernet0/0/17 down down 0% 12345 0

Ethernet0/0/20 down down 0% 22345 0

c. After testing with the line tester in the field, it is found that the No. 1 line of port 20 is blocked. After redoing the crystal head, AP can go online normally, and the fault can be solved.

From the tortuous process of solution, there are some feelings:

1. After the completion of the project, the corresponding documents and drawings should be improved to facilitate troubleshooting.

two。 It is necessary to find out the basic principles of the wireless network, such as the reasons why AP cannot be online: the versions of AC and AP should match, the power can be supplied properly, and the normal management IP can be obtained from the DHCP pool.

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