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Netgear XCM8806 Chassis Hardware Installation Guide - Page 740

Encapsulation Modes, Multiple Instance Spanning Tree Protocol EMISTP mode

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NETGEAR 8800 Chassis Switch CLI Manual or 802.1w mode. If you do not select point-to-point links and the peer is not configured in 802.1w mode, the STPD fails back to 802.1D mode. You can create only one MSTP region on the switch, and all switches that participate in the region must have the same regional configurations. You enable or disable an MSTP on a per STPD basis only. You do not enable MSTP on a per port basis. By default, the: • STPD operates in 802.1D mode. • Default device configuration contains a single STPD called s0. • Default VLAN is a member of STPD s0 with autobind enabled. All STP parameters default to the IEEE 802.1D values, as appropriate. Encapsulation Modes You can configure ports within an STPD to accept and transmit specific BPDU encapsulations. This STP port encapsulation is separate from the STP mode of operation. For example, you can configure a port to accept the PVST+ BPDU encapsulation while running in 802.1D mode. An STP port has three possible encapsulation modes: • 802.1D mode This mode is used for backward compatibility with previous STP versions and for compatibility with third-party switches using IEEE standard 802.1D. 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. • Multiple Instance Spanning Tree Protocol (EMISTP) mode EMISTP mode is proprietary to NETGEAR and is an extension of STP that allows a physical port to belong to multiple STPDs by assigning the port to multiple VLANs. EMISTP adds significant flexibility to STP network design. BPDUs are sent with an 802.1Q tag having an STPD instance Identifier (STPD ID) in the VLAN ID field. This encapsulation mode supports the following STPD modes of operation: 802.1D and 802.1w. • Per VLAN Spanning Tree (PVST+) mode 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. 740 | Chapter 17. STP Commands

Section	Page
NETGEAR 8800 Chassis Switch CLI Manual	1
Contents	3
1. Command Reference Overview	6
Introduction	6
Audience	6
Structure of this Guide	7
Understanding the Command Syntax	7
Access Levels	7
Syntax Symbols	8
Syntax Helper	8
Object Names	9
Command Shortcuts	10
Port Numbering	10
Numerical Ranges	10
Line-Editing Keys	11
Command History	12
2. Commands for Accessing the Switch	13
3. Commands for Managing the Switch	57
SNMP	57
Telnet	58
TFTP	58
System Redundancy with Dual Management Modules Installed	58
Power Supply Management	58
Simple Network Time Protocol	59
4. Commands for Managing the NETGEAR 8800 Software	157
5. Commands for Configuring Slots and Ports on a Switch	190
6. Commands for Configuring LLDP	269
7. PoE Commands	300
Summary of PoE Software Features	300
8. Commands for Status Monitoring and Statistics	330
Event Management System	330
sFlow Statistics	331
RMON	331
9. VLAN Commands	425
10. FDB Commands	453
11. Commands for Virtual Routers	472
12. Policy Manager Commands	481
13. ACL Commands	487
14. QoS Commands	520
15. Security Commands	554
SSH	554
SSL	554
User Authentication	554
Denial of Service	555
16. Network Login Commands	679
17. STP Commands	737
STP	737
RSTP	737
MSTP	738
Spanning Tree Domains	738
Member VLANs	738
Carrier VLAN	738
Protected VLAN	739
STPD Modes	739
Encapsulation Modes	740
STP Rules and Restrictions	741
18. VRRP Commands	793
19. IP Unicast Commands	814
20. IPv6 Unicast Commands	904
21. RIP Commands	950
22. RIPng Commands	973
23. OSPF Commands	994
OSPF Edge Mode	995
24. OSPFv3 Commands	1036
OSPF Edge Mode	1037
25. BGP Commands	1075
26. IP Multicast Commands	1163
27. IPv6 Multicast Commands	1242
28. MSDP Commands	1261
29. vMAN (PBN) Commands	1296
A. Configuration and Image Commands	1306
B. Troubleshooting Commands	1345
Event Management System	1345

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Match case Limit results 1 per page

740

Chapter 17.

STP Commands

NETGEAR 8800 Chassis Switch CLI Manual

or 802.1w mode. If you do not select point-to-point links and the peer is not configured in

802.1w mode, the STPD fails back to 802.1D mode.

You can create only one MSTP region on the switch, and all switches that participate in

the region must have the same regional configurations. You enable or disable an MSTP

on a per STPD basis only. You do not enable MSTP on a per port basis.

By default, the:

•

STPD operates in 802.1D mode.

•

Default device configuration contains a single STPD called

s0.

•

Default VLAN is a member of STPD s0 with autobind enabled.

All STP parameters default to the IEEE 802.1D values, as appropriate.

Encapsulation Modes

You can configure ports within an STPD to accept and transmit specific BPDU

encapsulations. This STP port encapsulation is separate from the STP mode of operation.

For example, you can configure a port to accept the PVST+ BPDU encapsulation while

running in 802.1D mode.

An STP port has three possible encapsulation modes:

•

802.1D mode

This mode is used for backward compatibility with previous STP versions and for

compatibility with third-party switches using IEEE standard 802.1D. 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.

•

Multiple Instance Spanning Tree Protocol (EMISTP) mode

EMISTP mode is proprietary to NETGEAR and is an extension of STP that allows a

physical port to belong to multiple STPDs by assigning the port to multiple VLANs.

EMISTP adds significant flexibility to STP network design. BPDUs are sent with an

802.1Q tag having an STPD instance Identifier (STPD ID) in the VLAN ID field.

This encapsulation mode supports the following STPD modes of operation: 802.1D and

802.1w.

•

Per VLAN Spanning Tree (PVST+) mode

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.