VLAN Translation is used to encapsulate one vlan (doq1q) in another vlan (dot1q) So, it is also called q-in-q encapsulation The or...

SUBINTERFACES Subinterfaces : we need it when we have more vlans than physical links As we know, we have  setup a trunking port between the ...

MAC ADDRESS, VLAN, ARP: Important commands for troubleshooting: Show lldp neighbors Show interface status Int et 1/1 →  ...

LAG (Link Aggregation): It is a virtual concept Thus, the LAG makes two links appear as one in STP The basic concept of...

INTRO TO SPANNING TREE: To see current STP configuration: #show run section span To configure STP, #spanning-tree mode rstp There ar...

INTRODUCTION TO ARP: * ARP is used to find the MAC address of the device for which we already know the IP address. * The address resoluti...

It is used for Inter-Vlan routing Using SVI, without using a router, we can route packets to different networks and vlans Trad...