What is Vlan ?
A virtual LAN (VLAN) is any broadcast domain that is partitioned and isolated in a computer network at the data link layer (OSI layer 2). LAN is an abbreviation for local area network. To subdivide a network into virtual LANs, one configures network equipment
What is VLAN Tagging
When VLANs span multiple switches, VLAN Tagging is required. A VLAN is a method of creating independent logical networks within a physical network. VLAN Tagging is the practice of inserting a VLAN ID into a packet header in order to identify which VLAN (Virtual Local Area Network) the packet belongs to.
what is VLAN Trunking Protocol (VTP)
VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol that propagates the definition of Virtual Local Area Networks (VLAN) on the whole local area network. To do this, VTP carries VLAN information to all the switches in a VTP domain. VTP advertisements can be sent over 802.1Q, and ISL trunks.
what is vlan transparent mode
VTP server is the default mode. Client—VTP clients behave the same way as VTP servers, but you cannot create, change, or delete VLANs on a VTP client. Transparent—VTP transparent switches do not participate in VTP.
what is vtp domain name ?
VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol that propagates the definition of Virtual Local Area Networks (VLAN) on the whole local area network. To do this, VTP carries VLAN information to all the switches in a VTP domain. VTPadvertisements can be sent over 802.1Q, and ISL trunks.
what is vlan promiscuous mode ?
PVLANs provide layer 2 isolation between ports within the same broadcast domain. ... Community— Community ports communicate among themselves and with their promiscuous ports. These interfaces are separated at Layer 2 from all other interfaces in other communities or isolated ports within their PVLAN.
what is interface vlan mode ?
A trunk port can carry traffic in one or more VLANs on the same physical link (VLANs are based on the trunk-allowed VLANs list). By default, a trunk interface can carry traffic for all VLANs. To specify that only certain VLANs are allowed on the specified trunk, use the switchport trunk allowed vlan command.
what is vlan database mode ?
Before creating a VLAN, put the Catalyst 4500 series switch in VTP server modeor VTP transparent mode. If the Catalyst 4500 series switch is a VTP server, you must define a VTP domain. For information on configuring VTP, see "Understanding and Configuring VTP." ... You cannot use Ctrl-Z to exit VLAN database mode.
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