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August 2012

Private VLANs

Private VLANs partitions a regular VLAN domain into subdomains. Such a subdomain is created when a primary VLAN is paired with a secondary VLAN. Only a switch in VTP Transparent mode supports Private VLANs 1. Primary VLAN To set a VLAN as Primary VLAN, use: After the secondary VLANs are …

VTP 101

1. How it works VTP (VLAN Trunking Protocol) is used to advertise VLAN information between connected switches in a network. VTP messages are sent only on trunk ports. VTP advertises the VLAN_ID, VLAN_NAME, VLAN_TYPE and VLAN_STATE information for each VLAN. VTP doesn’t send any information regarding port assignment to VLANs. …

Switchport Port Security

Port Security restricts the number of stations that are allowed to access a switch port. 1. Define allowed hosts Each time a host attempts to send a frame, the source MAC address is added to the list of secure MACs. This list of secure MAC addresses has a limited size, …

Switchport Traffic Control

1. Strom Control The Storm Control feature, will disable the interface as soon as a specific threshold is passed. The threshold is measured every 1 second. The threshold can represent the amount of broadcast, multicast or unicast traffic and it can configured with: All traffic on the interface will be …