Management Guide - Kamery IP

4Command Line Interfacespanning-tree modeThis command selects the spanning tree mode for this switch. Use the no form torestore the default.Syntaxspanning-tree mode {stp | rstp | mstp}no spanning-tree mode• stp - Spanning Tree Protocol (IEEE 802.1D)• rstp - Rapid Spanning Tree Protocol (IEEE 802.1w)• mstp - Multiple Spanning Tree (IEEE 802.1s)Default SettingrstpCommand ModeGlobal ConfigurationCommand Usage• Spanning Tree ProtocolUses RSTP for the internal state machine, but sends only 802.1D BPDUs.- This creates one spanning tree instance for the entire network. If multipleVLANs are implemented on a network, the path between specific VLANmembers may be inadvertently disabled to prevent network loops, thusisolating group members. When operating multiple VLANs, we recommendselecting the MSTP option.• Rapid Spanning Tree ProtocolRSTP supports connections to either STP or RSTP nodes by monitoringthe incoming protocol messages and dynamically adjusting the type ofprotocol messages the RSTP node transmits, as described below:- STP Mode – If the switch receives an 802.1D BPDU after a port’s migrationdelay timer expires, the switch assumes it is connected to an 802.1D bridgeand starts using only 802.1D BPDUs.- RSTP Mode – If RSTP is using 802.1D BPDUs on a port and receives anRSTP BPDU after the migration delay expires, RSTP restarts the migrationdelay timer and begins using RSTP BPDUs on that port.• Multiple Spanning Tree Protocol- To allow multiple spanning trees to operate over the network, you mustconfigure a related set of bridges with the same MSTP configuration,allowing them to participate in a specific set of spanning tree instances.- A spanning tree instance can exist only on bridges that have compatibleVLAN instance assignments.- Be careful when switching between spanning tree modes. Changing modesstops all spanning-tree instances for the previous mode and restarts thesystem in the new mode, temporarily disrupting user traffic.4-280