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aufg
aufg
New Member
May 31, 2018
Question

How configure more than two ISPs

  • May 31, 2018
  • 1 reply
  • 11734 views

Hi, I have two FG 100D configured inside an active/pasive cluster (HA). I have two ISP configured and I´m making load balancing throught static routing, therefore I have two default static routes with the same metric and priority. I have also configured keepaplive at both lines to make that FG remove this routes if there is any problem witch each ISP. This configuration is working properly several months ago. Now, my customer wants to add another two ISPs. I've extracted two ports from FG LAN Switch to connect the new ISPs, I have added another two static routes (same metric and priority), Iv'e configured the keepalive and I've added this ports to the policies. Right now I have an issue, all sessions (except 2 or 3) are using the old two ISPs (even If i make al full reboot of both FGs to restart all sessions), if I put out of service one of the old ISPs, all session bascul to the other old ISP and no to the new two ISPs....... What is wrong in my configuration? The new lines are operative throght FG, because when I make a Policy routing and force that a network go out to internet throught new lines there isn't any problem and users have internet. Thank you!!!

    1 reply

    alhashem
    alhashem
    New Member
    June 2, 2018

    the new default routes should have the same distance and priority. did you set the same value for administrative distance in your new default routes? because you didn't refer to the distance in your post.

     

    and type the below command in CLI to see the routing table

    get router info routing-table all

     

    do you see your new default routes under the 0.0.0.0 destination network?

     

    sorry for my poor English :)

     

    aufg
    aufgAuthor
    New Member
    June 14, 2018

    Hi,

     

    Thank you for your help. Yes, all static routes have the same administrative distance and same priority, I've checked the phisical interfaces and also have the same administrative distance.

     

    I have the four ISPs connected and failover is working fine, If I disconnect two ISPs (1 and 2) all sessions are balanced to the other two ISPs (3 and 4). It is strange, if I make a query to the routing table FG only has two 0.0.0.0/0 static routes (ISPs 1 and 2) but I have four configured (1,2,3 and 4).... All sessions are balanced between ISPs 1 and 2, If I disconnect one of this (1 for example), all sessions bascul to the other one (2), I only get sessions over ISPs 3 and 4 when I disconnect the ISPs 1 and 2........ Then, routing table erases ISPs 1 and 2 routes and adds ISPs 3 and 4 routes......

     

    I have not found the way to make the load balancing between four ISPs throught static routing. Could you help me please?

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