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
7
Examples
# Disable MAC address learning on interface Ethernet 2/1.
<Sysname> system-view
[Sysname] interface ethernet 2/1
[Sysname-Ethernet2/1] undo mac-address mac-learning enable
Related commands
display mac-address mac-learning
mac-address timer
Use mac-address timer to configure the aging timer for dynamic MAC address entries.
Use undo mac-address timer to restore the default.
Syntax
mac-address timer { aging seconds | no-aging }
undo mac-address timer
Default
The aging timer for dynamic MAC address entries is 300 seconds.
Views
System view
Predefined user roles
network-admin
Parameters
aging seconds: Sets an aging timer (in seconds) for dynamic MAC address entries.
no-aging: Sets dynamic MAC address entries not to age.
Usage guidelines
After the network topology changes, the dynamic MAC address entries are not updated in a timely
manner. As a result, the device cannot learn new MAC addresses and fails to forward the user traffic
correctly.
To solve this problem, set an appropriate aging time for dynamic MAC address entries. The device
automatically deletes the expired dynamic MAC address entries, and then the device learns new MAC
address entries to build new MAC address entries.
Follow these guidelines to set the aging timer appropriately:
• A long aging interval causes the MAC address table to retain outdated entries and fail to
accommodate the latest network changes.
• A short aging interval results in removal of valid entries and unnecessary broadcasts that affect
device performance.
Examples
# Set the aging time to 500 seconds for dynamic MAC address entries.
<Sysname> system-view
[Sysname] mac-address timer aging 500