HOW TO SET THE ARP TIMEOUT IN JUNIPER SCREEN OS FIREWALLS

PROCEDURE TO SET ARP TIMEOUT ON JUNIPER SCREENOS FIREWALL –

  1. Login to Juniper Firewall via SSH.
  2. Run the following command – “get config | inc arp
  3. If the output generates nothing, then the ARP age is set to 20 minutes (default value). To set this timeout value, use the “set arp age (time in seconds) ” command.
  4. Save this change by using the save command; else it will be reverted, when the firewall is rebooted.

 

SOME NOTABLE POINTS ON ARP TIMER –

  • The default is 1200 seconds (20 mins)
  • The max is 65535 seconds (approximately 18 hours). The strange number results from it being the maximum possible from a 16 bit integer field.
  • The minimum is 1 second.
  • The value can be modified by using the “set arp age” command
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