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Hierarchy Level

Release Information

Statement introduced in Junos OS Release 9.6.

Statement introduced in Junos OS Release 11.1 for the QFX Series.

Statement introduced in Junos OS Release 14.1X53-D20 for OCX Series switches.


Configure how long to maintain the physical topology database entries. The physical topology identifies the devices on the network and their physical interconnections.


seconds—Time to maintain physical topology entries.

Default: 300

Range: 1 through 2147483647

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.