Netgear XCM8810 - 8800 SERIES 10-SLOT CHASSIS SWITCH ハードウェアマニュアル
Chapter 17. STP Commands
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NETGEAR 8800 Chassis Switch CLI Manual
Note:
If you use EMISTP or PVST+, the STPD ID must be identical to the
VLAN ID of the carrier VLAN in that STPD.
If you have an 802.1D configuration, NETGEAR recommends that you configure the StpdID
to be identical to the VLAN ID of the carrier VLAN in that STPD.
to be identical to the VLAN ID of the carrier VLAN in that STPD.
If you configure MSTP, you do not need carrier VLANs for MSTP operation. With MSTP, you
configure a CIST that controls the connectivity of interconnecting MSTP regions and sends
BPDUs across the regions to communicate the status of MSTP regions. All VLANs
participating in the MSTP region have the same privileges.
configure a CIST that controls the connectivity of interconnecting MSTP regions and sends
BPDUs across the regions to communicate the status of MSTP regions. All VLANs
participating in the MSTP region have the same privileges.
Protected VLAN
Protected VLANs are all other VLANs that are members of the STPD. These VLANs
“piggyback” on the carrier VLAN. Protected VLANs do not transmit or receive STP BPDUs,
but they are affected by STP state changes and inherit the state of the carrier VLAN.
Protected VLANs can participate in multiple STPD, but any particular port in the VLAN can
belong to only one STPD. Also known as non-carrier VLANs.
“piggyback” on the carrier VLAN. Protected VLANs do not transmit or receive STP BPDUs,
but they are affected by STP state changes and inherit the state of the carrier VLAN.
Protected VLANs can participate in multiple STPD, but any particular port in the VLAN can
belong to only one STPD. Also known as non-carrier VLANs.
If you configure MSTP, all member VLANs in an MSTP region are protected VLANs. These
VLANs do not transmit or receive STP BPDUs, but they are affected by STP state changes
communicated by the CIST to the MSTP regions. MSTIs cannot share the same protected
VLAN; however, any port in a protected VLAN can belong to multiple MSTIs.
VLANs do not transmit or receive STP BPDUs, but they are affected by STP state changes
communicated by the CIST to the MSTP regions. MSTIs cannot share the same protected
VLAN; however, any port in a protected VLAN can belong to multiple MSTIs.
STPD Modes
An STPD has three modes of operation:
•
802.1D mode
Use this mode for backward compatibility with previous STP versions and for
compatibility with third-party switches using IEEE standard 802.1D. When configured in
this mode, all rapid configuration mechanisms are disabled.
compatibility with third-party switches using IEEE standard 802.1D. When configured in
this mode, all rapid configuration mechanisms are disabled.
•
802.1w mode
Use this mode for compatibility with Rapid Spanning Tree (RSTP). When configured in
this mode, all rapid configuration mechanisms are enabled. The benefit of this mode is
available on point-to-point and edge ports only.
this mode, all rapid configuration mechanisms are enabled. The benefit of this mode is
available on point-to-point and edge ports only.
You enable or disable RSTP on a per STPD basis only. You do not enable RSTP on a per
port basis.
port basis.
•
MSTP mode
Use this mode for compatibility with Multiple Spanning Tree (MSTP, 802.1s). MSTP is an
extension of RSTP and offers the benefit of better scaling with fast convergence. When
configured in this mode, all rapid configuration mechanisms are enabled. The benefit of
MSTP is available only on point-to-point links and when you configure the peer in MSTP
extension of RSTP and offers the benefit of better scaling with fast convergence. When
configured in this mode, all rapid configuration mechanisms are enabled. The benefit of
MSTP is available only on point-to-point links and when you configure the peer in MSTP