Cisco Catalyst 2950 Software Manual page 175

Chapter 8 Configuring VLANs
Table 8-2 Port Membership Modes
Membership Mode VLAN Membership Characteristics
Static-access A static-access port can belong to one VLAN and is manually assigned. By default, all ports are
static-access ports assigned to VLAN 1.
IEEE 802.1Q A trunk is a member of all VLANs in the VLAN database by default, but membership can be limited
by configuring the allowed-VLAN list. You can also modify the pruning-eligible list to block
flooded traffic to VLANs on trunk ports that are included in the list.
VLAN Trunking Protocol (VTP) maintains VLAN configuration consistency by managing the
addition, deletion, and renaming of VLANs on a network-wide basis. VTP exchanges VLAN
configuration messages with other switches over trunk links.
Dynamic access A dynamic-access port can belong to one VLAN and is dynamically assigned by a VLAN
Membership Policy Server (VMPS). The VMPS can be a Catalyst 5000 series switch but never a
Catalyst 2950, Catalyst 2900 XL, or Catalyst 3500 XL switch.
When a port belongs to a VLAN, the switch learns and manages the addresses associated with the port
on a per-VLAN basis. For more information, see the
page
78-11380-03
6-15.
Assigning VLAN Port Membership Modes
"Managing the MAC Address Tables" section on
Catalyst 2950 Desktop Switch Software Configuration Guide
8-5