Monday, July 21, 2008

VLAN

Identifyng the VLAN

Switches use frame tagging method to perform this function.

1) Access link

An access link that is port only one VLAN.
2)Trunk link

Trunk can carry multiple VLAN's. A trunk link is used to connect switches to other switches. Trunk link are supported on fast Ethernet or gigabyte Ethernet only. To identify the VLAN that a frame belongs to CISCO switches support two identification technique
a) ISL (Inter Switch Link)
b) IEEE 802.1Q

Configuration

(config) # VLAN 2 name ccna
(config) # int e0/4
(config-if) # vlan-membership static 2

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