Juniper JUNOSE 11.2.X MULTICAST ROUTING, Configuration Manual

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Managing Port Redundancy on Gigabit Ethernet I/O Modules
By default, the software manages port redundancy on Gigabit Ethernet I/O modules
automatically. However, you can manage redundancy on GE I/O modules as follows:
•
Specify the time that the router waits for a port on a Gigabit Ethernet I/O module to
become active before the router switches to the redundant port.
• Force a Gigabit Ethernet I/O module to switch operation from one port to the other.
• Disable port redundancy by specifying operation on one port only.
•
Clear Address Resolution Protocol (ARP) entries on interfaces with redundant ports
when the primary link fails.
If you manage port redundancy manually, the router retains the manual configuration
after the module reboots.
You can monitor the port redundancy configuration with the show interfaces
gigabitEthernet command and the show interfaces tenGigabitEthernet command.
NOTE: The router manages failover in the same way for the Gigabit Ethernet I/O modules
and the GE-2 SFP I/O module.
link failover arp-flush
•
Use to clear the ARP cache on an interface with redundant ports when the primary link
fails. This feature enables the router to clear the ARP entries and obtain the media
access control (MAC) address of the active link, thereby reducing the delay in learning
new MAC addresses.
•
Clearing the ARP cache after a link failover is supported on GE I/O modules with
redundant ports.
•
Example
host1(config)# interface gigabitEthernet 1/0
host1(config-if)# link failover arp-flush
•
Use the no version to maintain the ARP entries on the interface in the event of a failover.
•
See link failover arp-flush.
link failover force
•
Use to force a Gigabit Ethernet I/O module to switch operation from one port to the
other.
•
Select an interface on the Gigabit Ethernet I/O module before you issue this command.
•
Example
host1(config)# interface gigabitEthernet 5/0
host1(config-if)# link failover force
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JunosE 11.2.x Physical Layer Configuration Guide