Create a Post
cancel
Showing results for 
Search instead for 
Did you mean: 
Nischit
Contributor

ISP redundancy Load sharing one link failure

Hi Team,

I have configure ISP redundancy > load sharing in Checkpoint r80.20. I have managed to send traffic 60% and 40% from 2 ISP links. 

If one of the ISP link (suppose 40%) goes down, does all the traffic goes via another ISP which is handling 60% traffic?

0 Kudos
3 Replies
PhoneBoy
Admin
Admin

Yes, that’s how ISP Redundancy works.

Timothy_Hall
Champion
Champion

Yes, but open connections that were using the 40% ISP at time of ISP failover to the 60% ISP will be killed and have to restart.  This is because the NAT address for the connection must change upon ISP failover, and a existing connection cannot have its NAT address changed once the connection is established.

New 2021 IPS/AV/ABOT Immersion Self-Guided Video Series
now available at http://www.maxpowerfirewalls.com

I am not sure for R80.20, but ISP load sharing disables SecureXL to large extent (only local traffic is accelerated). Keep that in mind.