Solution to reset the VLAN trouble

When the unit in the management and maintenance of LAN, if cascaded port connection ordinary switches is changed, so before the VLAN set in the switch system is often will not play a role. So, we can only re set VLAN? If so, the network maintenance workload is significant; in fact, in the ordinary switch port cascade, we only need to switch into the admin interface, modify the cascade port mode, so that all VLAN access can pass, so that it can avoid re setting VLAN operation. Now we take a unit of local area network, for example, to give you a detailed description of the specific steps of the switch settings:

Assume that the LAN network to a total of 6 VLAN, which is located in the A subnet S1 switch, S2 switch is located in the B subnet; recently purchased a few units of new workstations now need to switch to B S1 mobile subnet, but before the S1 switch is the core switch for optical fiber cable and a single LAN directly connected on port 24. In order to avoid the re distribution of VLAN in the switch system, we can change the S1, S2 switch port operating mode. For example, we can check the S1 switch port settings; during this inspection, first through the telnet command to switch the remote login admin interface, and execute the command string "display interfaces", so we can see the specific configuration of each port of the switch. The results returned from the above command, we see S1 switch and S2 switch to maintain cascade connection of 26 port status is "interface ethernet0/26, port access VLAN 2", the state is not difficult for us to understand S1 switches only belong to VLAN2, that is to say the switch is only allowed from VLAN2 workstation access, other VLAN the workstation can not pass; when the S1 switch to change position, it must be located in the new VLAN, in order to make all new workstations in the VLAN can be used, we need here will switch S1 26 port work model is amended as "trunk", so S1 does not need to set the switch VLAN, you can make all the new workstation in VLAN can pass.