https://community.checkpoint.com/t5/Firewall-and-Security-Management/ISP-redundancy-Load-sharing-one-link-failure/m-p/47327#M3514 <P>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.&nbsp; 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.</P> Mon, 18 Mar 2019 02:00:51 GMT Timothy_Hall 2019-03-18T02:00:51Z https://community.checkpoint.com/t5/Firewall-and-Security-Management/ISP-redundancy-Load-sharing-one-link-failure/m-p/47243#M3509 <P>Hi Team,<BR /><BR />I have configure ISP redundancy &gt; load sharing in Checkpoint r80.20. I have managed to send traffic 60% and 40% from 2 ISP links.&nbsp;<BR /><BR />If one of the ISP link (suppose 40%) goes down, does all the traffic goes via another ISP which is handling 60% traffic?</P> Sun, 17 Mar 2019 06:24:21 GMT https://community.checkpoint.com/t5/Firewall-and-Security-Management/ISP-redundancy-Load-sharing-one-link-failure/m-p/47243#M3509 Nischit 2019-03-17T06:24:21Z https://community.checkpoint.com/t5/Firewall-and-Security-Management/ISP-redundancy-Load-sharing-one-link-failure/m-p/47274#M3512 <P>Yes, that’s how ISP Redundancy works.</P> Sun, 17 Mar 2019 16:02:14 GMT https://community.checkpoint.com/t5/Firewall-and-Security-Management/ISP-redundancy-Load-sharing-one-link-failure/m-p/47274#M3512 PhoneBoy 2019-03-17T16:02:14Z https://community.checkpoint.com/t5/Firewall-and-Security-Management/ISP-redundancy-Load-sharing-one-link-failure/m-p/47327#M3514 <P>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.&nbsp; 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.</P> Mon, 18 Mar 2019 02:00:51 GMT https://community.checkpoint.com/t5/Firewall-and-Security-Management/ISP-redundancy-Load-sharing-one-link-failure/m-p/47327#M3514 Timothy_Hall 2019-03-18T02:00:51Z https://community.checkpoint.com/t5/Firewall-and-Security-Management/ISP-redundancy-Load-sharing-one-link-failure/m-p/47341#M3515 <P>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.</P> Mon, 18 Mar 2019 04:27:08 GMT https://community.checkpoint.com/t5/Firewall-and-Security-Management/ISP-redundancy-Load-sharing-one-link-failure/m-p/47341#M3515 HristoGrigorov 2019-03-18T04:27:08Z