Sunday, September 24, 2006

VLAN tagging

Tagging is used when a single port serves more than one VLAN. Workstations, which lie on the edge within anetwork, are not neccessarily tagged on; instead, port based tagging should be used. The port connecting the workstation can used an untagged port.

Links between two switches should use tagged ports when they're serving more than one VLAN.

BACH has to be tagged because it serves more than one network and the tags provide the information for distinguishing the origins of the packets it receives. DHCP Server running on BACH distributes IPs to clientson different subnets based on VLAN.

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