Router ARP Table

Answered Question
Apr 1st, 2010

clear arp-cache cause problems in a production environment?

Correct Answer by droeun141 about 6 years 11 months ago

During peak hours, it can.  Best way is to shorten the ARP timeout per VLAN so you don't flush the entire table.

Correct Answer by Ganesh Hariharan about 6 years 11 months ago
clear arp-cache cause problems in a production environment?

Hi,


It wont as arp table re-populates immediately but my experience say to do this on off peak hours in order to ignore the minimal impact which can cause after clearing the arp.


Hope to Help !!


Ganesh.H


Cisco are currently donating money to the Haiti earthquake appeal for every rating so please consider rating all helpful posts.

Correct Answer by Jon Marshall about 6 years 11 months ago

Carlos


It's not something you want to be doing frequently but i have done it in production networks before and the effect is mimimal because the arp table gets repopulated almost immediately. If possible be as specific as you can ie. can you specify which entries you want to remove rather than clear the entire cache.


If you are at all worried then you should do this out of core hours.


Jon


Cisco are currently donating money to the Haiti earthquake appeal for every rating so please consider rating all helpful posts.

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (3 ratings)
Loading.
Correct Answer
Jon Marshall Thu, 04/01/2010 - 12:09

Carlos


It's not something you want to be doing frequently but i have done it in production networks before and the effect is mimimal because the arp table gets repopulated almost immediately. If possible be as specific as you can ie. can you specify which entries you want to remove rather than clear the entire cache.


If you are at all worried then you should do this out of core hours.


Jon


Cisco are currently donating money to the Haiti earthquake appeal for every rating so please consider rating all helpful posts.

Correct Answer
Ganesh Hariharan Fri, 04/02/2010 - 06:33
clear arp-cache cause problems in a production environment?

Hi,


It wont as arp table re-populates immediately but my experience say to do this on off peak hours in order to ignore the minimal impact which can cause after clearing the arp.


Hope to Help !!


Ganesh.H


Cisco are currently donating money to the Haiti earthquake appeal for every rating so please consider rating all helpful posts.

Correct Answer
droeun141 Fri, 04/02/2010 - 08:41

During peak hours, it can.  Best way is to shorten the ARP timeout per VLAN so you don't flush the entire table.

Actions

This Discussion