HP MSR2000/3000/4000 Router Series Layer 2 - LAN Switching Command Reference
Table Of Contents
- Title Page
- Contents
- MAC address table commands
- Port isolation commands
- Spanning tree commands
- active region-configuration
- check region-configuration
- display stp
- display stp abnormal-port
- display stp bpdu-statistics
- display stp down-port
- display stp history
- display stp region-configuration
- display stp root
- display stp tc
- instance
- region-name
- reset stp
- revision-level
- stp bpdu-protection
- stp bridge-diameter
- stp compliance
- stp config-digest-snooping
- stp cost
- stp edged-port
- stp enable
- stp global config-digest-snooping
- stp global enable
- stp global mcheck
- stp loop-protection
- stp max-hops
- stp mcheck
- stp mode
- stp no-agreement-check
- stp pathcost-standard
- stp point-to-point
- stp port priority
- stp port-log
- stp priority
- stp region-configuration
- stp role-restriction
- stp root primary
- stp root secondary
- stp root-protection
- stp tc-protection
- stp tc-protection threshold
- stp tc-restriction
- stp timer forward-delay
- stp timer hello
- stp timer max-age
- stp timer-factor
- stp transmit-limit
- vlan-mapping modulo
- Loop detection commands
- VLAN commands
- LLDP commands
- display lldp local-information
- display lldp neighbor-information
- display lldp statistics
- display lldp status
- display lldp tlv-config
- lldp admin-status
- lldp check-change-interval
- lldp enable
- lldp encapsulation snap
- lldp fast-count
- lldp global enable
- lldp hold-multiplier
- lldp management-address-format string
- lldp max-credit
- lldp mode
- lldp notification med-topology-change enable
- lldp notification remote-change enable
- lldp timer fast-interval
- lldp timer notification-interval
- lldp timer reinit-delay
- lldp timer tx-interval
- lldp tlv-enable
- Support and other resources
- Index
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Usage guidelines
You can configure the loop protection action globally or on specific ports. The global configuration
applies to all ports. The per-port configuration applies to the individual ports. The per-port configuration
takes precedence over the global configuration.
Example
# Set the global loop protection action to shutdown.
<Sysname> system-view
[System] loopback-detection global action shutdown
Related commands
• display loopback-detection
• loopback-detection action
loopback-detection global enable
Use loopback-detection global enable to enable loop detection globally.
Use undo loopback-detection global enable to disable loop detection globally.
Syntax
loopback-detection global enable vlan { vlan-list | all }
undo loopback-detection global enable vlan { vlan-list | all }
Default
The loop detection function is globally disabled.
Views
System view
Predefined user roles
network-admin
Parameters
vlan-list: Specifies a VLAN list, in the format of { vlan-id [ to vlan-id ] }&<1-10>, where vlan-id represents
the VLAN ID in the range of 1 to 4094, and &<1-10> indicates that you can specify up to 10 vlan-id [ to
vlan-id ] parameters.
all: Specifies all existing VLANs.
Usage guidelines
You can enable loop detection globally or on specific ports. The global configuration applies to all ports
in the specified VLAN. The per-port configuration applies to the individual port only when the port
belongs to the specified VLAN.
Example
# Globally enable loop detection for VLAN 10 through VLAN 20.
<Sysname> system-view
[System] loopback-detection global enable vlan 10 to 20
Related commands
• display loopback-detection