Cisco IE-4000 Software Configuration Manual page 277

Configuring VLANs
VLANs
Table 33 Port Membership Modes and Characteristics
Membership Mode VLAN Membership Characteristics
Static-access A static-access port can belong to one VLAN and is
manually assigned to that VLAN.
For more information, see
to a VLAN, page
Trunk (ISL or A trunk port is a member of all VLANs by default, including
IEEE 802.1Q) extended-range VLANs, 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.
For information about configuring trunk ports, see
Configuring an Ethernet Interface as a Trunk Port,
page
Dynamic access A dynamic-access port can belong to one VLAN and is
dynamically assigned by a VMPS (VLAN Membership
Policy Server). The VMPS can be a Catalyst 5000 or
Catalyst 6500 series switch, for example, but never an
IE 2000 switch. The IE 2000 switch is a VMPS client.
You can have dynamic-access ports and trunk ports on
the same switch, but you must connect the
dynamic-access port to an end station or hub and not to
another switch.
For configuration information, see
Dynamic-Access Ports on VMPS Clients, page
Voice VLAN A voice VLAN port is an access port attached to a Cisco
IP Phone, configured to use one VLAN for voice traffic and
another VLAN for data traffic from a device attached to the
phone.
For more information about voice VLAN ports, see
Configuring Voice VLAN, page 309
For more detailed definitions of access and trunk modes and their functions, see
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
Normal-Range VLANs
Normal-range VLANs are VLANs with VLAN IDs 1 to 1005. If the switch is in VTP server or VTP transparent mode, you
can add, modify or remove configurations for VLANs 2 to 1001 in the VLAN database. (VLAN IDs 1 and 1002 to 1005
are automatically created and cannot be removed.)
Configurations for VLAN IDs 1 to 1005 are written to the vlan.dat file (VLAN database), and you can display them by
entering the show vlan privileged EXEC command. The vlan.dat file is stored in flash memory.
Caution: You can cause inconsistency in the VLAN database if you attempt to manually delete the vlan.dat file. If you
want to modify the VLAN configuration, use the commands described in these sections.
Assigning Static-Access Ports
285.
286.
Changing the Address Aging Time, page
VTP Characteristics
VTP is not required. If you do not want VTP
to globally propagate information, set the
VTP mode to transparent. To participate in
VTP, there must be at least one trunk port
on the switch connected to a trunk port of
a second switch.
VTP is recommended but not required.
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.
VTP is required.
Configure the VMPS and the client with the
same VTP domain name.
To participate in VTP, at least one trunk port
on the switch must be connected to a trunk
port of a second switch.
Configuring
290.
VTP is not required; it has no effect on a
voice VLAN.
115.
273
Table 35 on page 278.