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[All About Switches] Users Connected to the Switch Cannot Go Online

Latest reply: Mar 16, 2018 07:03:34 1528 2 1 0 0

Involved Products and Versions

S9300 V200R001


In Figure 1-1, the ME60 is connected to the Switch, and the Switch is connected to many users.

Figure 1-1 Users connected to the Switch unable to go online




Users cannot go online.

Cause Analysis

Global rate limiting is configured on the Switch. As a result, a large number of service packets are discarded.


                          Step 1     Run the display interface interface-type interface-number command on the Switch to view traffic on the specified interface. The command output shows the interface traffic is lower than the usual traffic but the number of users remains unchanged.

                          Step 2     Run the display logbuffer command on the Switch to view log information. The command output contains the traffic-policy 10M global inbound configuration, indicating that rate limiting may have been configured on the Switch.

Jun 1 2017 09:00:36 5S.HZ-CGX.HW9303 %SHELL/5/CMDRECORD(l):Record command information. (Task=VT0 , Ip=, User=fuqiao, Command="traffic-policy 10M global inbound")

                          Step 3     Find that the following rate limiting configuration exists on the Switch:

traffic classifier 10M operator or precedence 15
 if-match any
traffic behavior 10M
 car cir 10240 pir 10240 cbs 1925120 pbs 3205120 mode color-blind green pass yellow pass red discard
traffic policy 10M match-order auto
classifier 10M behavior 10M
traffic-policy 10M global inbound

After the rate limiting configuration is deleted from the Switch, services on the Switch become normal, and users connected to the Switch can go online normally.


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Created Mar 16, 2018 01:30:56

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Created Mar 16, 2018 07:03:34

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