Supported Platforms
Related Documentation
- EX Series
- Example: Setting Up Basic Bridging and a VLAN for an EX Series Switch
- Example: Setting Up Bridging with Multiple VLANs for EX Series Switches
- Example: Connecting an Access Switch to a Distribution Switch
- Controlling Authentication Session Timeouts (CLI Procedure)
- Understanding Bridging and VLANs on EX Series Switches
Configuring MAC Table Aging (CLI Procedure)
 | Note: This task uses Junos OS for EX Series switches that do not support the Enhanced Layer 2 Software (ELS) configuration style. If your switch runs software that supports ELS, see Configuring MAC Table Aging (CLI Procedure). |
The Ethernet switching table (or MAC table) aging process ensures that the EX Series switch tracks only active MAC addresses on the network and is able to flush out MAC addresses that are no longer used.
You can configure the MAC table aging time, the maximum time that an entry can remain in the Ethernet Switching table before it “ages out,” either on all VLANs on the switch or on particular VLANs. This setting can influence efficiency of network resource use by affecting the amount of traffic that is flooded to all interfaces because when traffic is received for MAC addresses no longer in the Ethernet switching table, the switch floods the traffic to all interfaces.
To configure the MAC table aging time on all VLANs on the switch:
[edit]
user@switch# set ethernet-switching-options mac-table-aging-time secondsTo configure the MAC table aging time on a VLAN:
[edit]
user@switch# set vlans vlan-name mac-table-aging-time seconds | Note: You can set the MAC table aging time to unlimited. If you specify the value as unlimited, entries are never removed from the table. Generally, use this setting only if the switch or the VLAN has a fairly static number of end devices; otherwise the table will eventually fill up. You can use this setting to minimize traffic loss and flooding that might occur when traffic arrives for MAC addresses that have been removed from the table. |
Related Documentation
- EX Series
- Example: Setting Up Basic Bridging and a VLAN for an EX Series Switch
- Example: Setting Up Bridging with Multiple VLANs for EX Series Switches
- Example: Connecting an Access Switch to a Distribution Switch
- Controlling Authentication Session Timeouts (CLI Procedure)
- Understanding Bridging and VLANs on EX Series Switches
Published: 2014-04-23
Supported Platforms
Related Documentation
- EX Series
- Example: Setting Up Basic Bridging and a VLAN for an EX Series Switch
- Example: Setting Up Bridging with Multiple VLANs for EX Series Switches
- Example: Connecting an Access Switch to a Distribution Switch
- Controlling Authentication Session Timeouts (CLI Procedure)
- Understanding Bridging and VLANs on EX Series Switches
