Netgear XCM8806 Chassis Hardware Installation Guide - Page 747

NETGEAR 8800 Chassis Switch CLI Manual • A VLAN/port for which the carrier VLAN does not yet belong Note: This restriction is only enforced in an active STP domain and when you enable STP to make sure you have a legal STP configuration. Care must be taken to ensure that ports in overlapping domains do not interfere with the orderly working of each domain's protocol. By default, when the switch boots for the first time, it automatically creates a VLAN named default with a tag value of 1 and STPD s0. The switch associates VLAN default to STPD s0. All ports that belong to this VLAN and STPD are in 802.1D encapsulation mode with autobind enabled. If you disable autobind on the VLAN default, that configuration is saved across a reboot. Naming Conventions If your STPD has the same name as another component, for example a VLAN, NETGEAR recommends that you specify the identifying keyword as well as the name. If your STPD has a name unique only to that STPD, the keywords stpd and vlan are optional. STP Encapsulations Modes You can specify the following STP encapsulation modes: • dot1d-This mode is reserved for backward compatibility with previous STP versions. BPDUs are sent untagged in 802.1D mode. Because of this, any given physical interface can have only one STPD running in 802.1D mode. This encapsulation mode supports the following STPD modes of operation: 802.1D, 802.1w, and MSTP. • emistp-This mode sends BPDUs with an 802.1Q tag having an STPD ID in the VLAN ID field. This encapsulation mode supports the following STPD modes of operation: 802.1D and 802.1w. • pvst-plus-This mode implements PVST+ in compatibility with third-party switches running this version of STP. The STPDs running in this mode have a one-to-one relationship with VLANs, and send and process packets in PVST+ format. This encapsulation mode supports the following STPD modes of operation: 802.1D and 802.1w. These encapsulation modes are for STP ports, not for physical ports. When a physical port belongs to multiple STPDs, it is associated with multiple STP ports. It is possible for the physical port to run in different modes for different domains for which it belongs. Chapter 17. STP Commands | 747