Netgear XCM8806 Chassis User Manual - Page 534
Rapid Root Failover, Automatically Inheriting Ports-MSTP Only
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NETGEAR 8800 User Manual • Protected VLAN named v2 • v2 contains ports 3:1-3:4 Since v1 contains ports 3:1-3:2, v2 is aware only of the STP changes for ports 3:1 and 3:2, respectively. Ports 3:3 and 3:4 are not part of the STPD, which is why v2 is not aware of any STP changes for those ports. In addition, enabling autobind on a protected VLAN causes ports to be automatically added or removed as the carrier VLAN changes. For MSTP, when you issue this command, any port or list of ports that gets automatically added to an MSTI are automatically inherited by the CIST. In addition, any port or list of ports that you remove from an MSTI protected VLAN are automatically removed from the CIST. For more information, see Automatically Inheriting Ports-MSTP Only on page 534. To remove ports, use the following command: configure stpd delete vlan ports [all | ] If you manually delete a port from the STPD on a VLAN that has been added by autobind, XCM8800 records the deletion so that the port does not get automatically added to the STPD after a system restart. To learn more about the member VLANs, see Member VLANs on page 527. For more detailed information about these CLI commands, see the NETGEAR 8800 Chassis Switch CLI Manual. Automatically Inheriting Ports-MSTP Only In an MSTP environment, whether you manually or automatically bind a port to an MSTI in an MSTP region, the switch automatically binds that port to the CIST. The CIST handles BPDU processing for itself and all of the MSTIs; therefore, the CIST must inherit ports from the MSTIs in order to transmit and receive BPDUs. You can only delete ports from the CIST if it is no longer a member of an MSTI. For more information about MSTP, see Multiple Spanning Tree Protocol on page 557. Rapid Root Failover XCM8800 supports rapid root failover for faster STP failover recovery times in STP 802.1D mode. If the active root port link goes down, XCM8800 recalculates STP and elects a new root port. The rapid root failover feature allows the new root port to immediately begin forwarding, skipping the standard listening and learning phases. Rapid root failover occurs only when the link goes down and not when there is any other root port failure, such as missing BPDUs. The default setting for this feature is disabled. To enable rapid root failover, use the following command: enable stpd rapid-root-failover To display the configuration, use the following command: 534 | Chapter 18. STP
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