All ports commonly become inactive after a power cycle. The switch port often goes into the inactive state if the switch is configured as a VLAN Trunk Protocol (VTP) client with the uplink trunk port on a VLAN other than VLAN 1. Such a switch loses its VLAN database after a reset. As a result, the uplink port and other ports that are not members of VLAN 1 become inactive.
Perform these steps to resolve the problem:
Change the VTP mode temporarily to the transparent mode. switch (enable) set vtp mode transparent VTP domain CISCO modified switch (enable)
Add the VLAN to which the uplink port is assigned to the VLAN database. This example assumes that VLAN 3 is assigned to the uplink port. switch (enable) set vlan 3 VTP advertisements transmitting temporarily stopped, and will resume after the command finishes. Vlan 3 configuration successful switch (enable)
Change the VTP mode back to the client mode when the uplink port begins to forward traffic. switch (enable) set vtp mode client VTP domain CISCO modified where, 'CISCO' is the domain name.
When you complete these steps, VTP repopulates the VLAN database from the VTP server. All ports, which were members of VLANs that the VTP server advertised, move back into the active state.
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