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NETGEAR 8800 Chassis Switch CLI Manual Default By default, this feature is disabled. Usage Guidelines This command applies only to ports that have already been configured as edge ports. Loop prevention and detection on an edge port configured for RSTP or MSTP is called edge safeguard. You configure edge safeguard on RSTP or MSTP edge ports to prevent accidental or deliberate misconfigurations (loops) resulting from connecting two edge ports together or by connecting a hub or other non-STP switch to an edge port. Edge safeguard also limits the impact of broadcast storms that might occur on edge ports. An edge port configured with edge safeguard immediately enters the forwarding state and transmits BPDUs. This advanced loop prevention mechanism improves network resiliency but does not interfere with the rapid convergence of edge ports. Recovery time starts as soon as the port becomes disabled. If no recovery-timeout is specified, the port is permanently disabled. BPDU restrict can be disabled using the configure {stpd} ports bpdu-restrict [enable | disable] {recovery-timeout {}} command and selecting disable. If edge safeguard is disabled, BPDU restrict is also disabled. To view the status of the edge safeguard feature use the show {stpd} ports {[detail | {detail}]} command. You can also use the show stpd { | detail} command to display the STPD configuration on the switch, including the enable/disable state for edge safeguard. Note: In MSTP, configuring edge safeguard at CIST will be inherited in all MSTI. To disable edge safeguard, use one of the following commands: • configure {stpd} ports edge-safeguard disable {bpdu-restrict} {recovery-timeout {}} • configure stpd ports link-type [[auto | broadcast | point-to-point] | edge {edge-safeguard [enable | disable] {bpdu-restrict} {recovery-timeout }}] Example The following command enables edge safeguard on RSTP edge port 4 in STPD s1 on a stand-alone switch: configure stpd s1 ports edge-safeguard enable 4 760 | 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

760

Chapter 17.

STP Commands

NETGEAR 8800 Chassis Switch CLI Manual

Default

By default, this feature is disabled.

Usage Guidelines

This command applies only to ports that have already been configured as edge ports.

Loop prevention and detection on an edge port configured for RSTP or MSTP is called

edge

safeguard

. You configure edge safeguard on RSTP or MSTP edge ports to prevent

accidental or deliberate misconfigurations (loops) resulting from connecting two edge ports

together or by connecting a hub or other non-STP switch to an edge port. Edge safeguard

also limits the impact of broadcast storms that might occur on edge ports.

An edge port configured with edge safeguard immediately enters the forwarding state and

transmits BPDUs. This advanced loop prevention mechanism improves network resiliency

but does not interfere with the rapid convergence of edge ports.

Recovery time starts as soon as the port becomes disabled. If no recovery-timeout is

specified, the port is permanently disabled.

BPDU restrict can be disabled using the

configure {stpd} <stpd_name> ports

bpdu-restrict [enable | disable] <port_list> {recovery-timeout {<seconds>}}

command and selecting

disable

If edge safeguard is disabled, BPDU restrict is also disabled.

To view the status of the edge safeguard feature use the

show {stpd} <stpd_name> ports

{[detail | <port_list> {detail}]}

command. You can also use the

show stpd

{<stpd_name> | detail}

command to display the STPD configuration on the switch, including

the enable/disable state for edge safeguard.

Note:

In MSTP, configuring edge safeguard at CIST will be inherited in all

MSTI.

To disable edge safeguard, use one of the following commands:

•

configure {stpd} <stpd_name> ports edge-safeguard disable <port_list>

{bpdu-restrict} {recovery-timeout {<seconds>}}

•

configure stpd <stpd_name> ports link-type [[auto | broadcast | point-to-point]

<port_list> | edge <port_list> {edge-safeguard [enable | disable]

{bpdu-restrict} {recovery-timeout <seconds>}}]

Example

The following command enables edge safeguard on RSTP edge port 4 in STPD

on a

stand-alone switch:

configure stpd s1 ports edge-safeguard enable 4