Ch11-Implementing Ethernet Virtual LANS Flashcards
IEEE standardized protocol for VLAN trunking
802.1Q
In campus VLANs, an Ethernet segment over which the devices add a VLAN header that identifies the VLAN in which the frame exists
trunk
The configured trunking setting on a Cisco switch interface, as configured with the <b>switchport mode</b> command
trunking administrative mode
The current behavior of a Cisco switch interface for VLAN trunking
trunking operational mode
A group of devices, connected to one or more switches, with the devices grouped into a single broadcast domain through switch configuration.
VLAN
A Cisco-proprietary messaging protocol used between switches to communicate configuration information about the existence of VLANs, including the VLAN ID and VLAN name
VLAN Trunking Protocol (VTP)
One of three VTP operational modes. Switches in this mode can configure VLANs, but they do not tell other switches about the changes, and they do not learn about VLAN changes from other switches
VTP transparent mode
One of three VTP operational modes. Switches in this mode learn about VLAN numbers and names from other switches, but this mode will not allow the switch to be directly configured with VLAN information
VTP client mode
One of three VTP operational modes. Switches in this mode can configure VLANs, tell other switches about the changes, and learn about VLAN changes from other switches
VTP server mode
A LAN switch that can also perform Layer 3 routing functions
Layer 3 switch
A LAN network design term that refers to a switch interface connected to end-user devices, configured so that it does not use VLAN trunking
access interface
A switch interface configured so that it operates using VLAN trunking, either 802.1Q or ISL
trunk interface
A VLAN used by typical data devices connected to an Ethernet
data VLAN
A VLAN defined for used by IP phones, with the switch notifying the phone about the VLAN ID so that the phone can use 802.1Q frames to support traffic for the phone and the attached PC
voice VLAN
Command reference:
Global config command that both creates the VLAN and puts the CLI into VLAN configuration mode
vlan <i>vlan-id</i>
Command reference:
VLAN subcommand that names the vlan
name <i>vlan-name</i>
Command reference:
VLAN mode command that enables (no shutdown) or disables (shutdown) the vlan
[no] shutdown
Command reference:
Global command that has the same effect as the [no] shutdown VLAN mode subcommand
[no] shutdown vlan <i>vlan-id</i>
Command reference:
Global command that defines the vtp mode
vtp mode [server | client | transparent | off]
Command reference:
Interface subcommand that configures the trunking administrative mode on that interface
switchport mode {access | dynamic {auto | desirable} | trunk}
Command reference:
Interface subcommand that statically configures the interface into that one VLAN
switchport access vlan <i>vlan-id</i>
Command reference:
Interface subcommand that defines which type of trunking to use (encapsulation), assuming that trunking is configured or negotiated
switchport trunk encapsulation [dot1q | isl | negotiate]
Command reference:
Interface subcommand that devices the native vlan for a trunk port
switchport trunk native vlan <i>vlan-id</i>
Command reference:
Interface subcommand that disables the negotiation of VLNA trunking
switchport nonegotiate
Command reference:
Interface subcommand that defines the voice vlan on a port, meaning that the switch uses 802.1Q tagging for frames in this VLAN
switchport voice vlan <i>vlan-id</i>
Command reference:
Interface subcommand that defines the list of allowed VLANS
switchport trunk allowed vlan {add | all | except | remove} <i>clan-list</i>
Command reference:
Lists information about any interface regarding administrative settings and operational state
show interfaces <i>interface-id</i> switchport
Command reference:
Lists information about all operational trunks (but no other interfaces), including the list of VLANs that can be forwarded over the trunk
show interfaces <i>interface-id</i>trunk
Lists information about the VLAN
show vlan {brief | id <i>vlan-id</i> | name <i>vlan-name</i> | summary}
Displays VLAN information
show vlan <i>vlan-id</i>
Lists VTP configuration and status information
show vtp status
