ISP load balance application

Question

Hello,I did an ISP load balance and it worked!But when I was looking for more applications, I failed ......Here is my structure :My requirement is that when my source IP is 192.168.40.0/24 network segment, I will fix to go to line A, then when line A has problems will change to line B, when line A is restored continue to go to line A, other network segment source IP, go to A or B.So I created two virtual servers.All:Source: 0.0.0.0/0 Destination: 0.0.0.0/0 Pool members: A and BOnly A:Source: 192.168.40.0/24 destination: 0.0.0.0/0 pool member: AAfter establishing a good find, when the source IP is 192.168.40.0/24 network segment traffic does hit A hit, but when I close the A line, found that it will not go to B hit ...Please advise how to solveAny help is appreciate.&nbsp;

mohamed_ahmed_kansoh · Answer

Hi&nbsp;young19918&nbsp;,&nbsp;Well,&nbsp;What are your configuration look like on Bigip.&nbsp;&gt; Do you use irule to make the Source 192.168.40.0/24 go to Link A ?&gt; what are the pool configuration in this virtual server :(&nbsp;Source: 192.168.40.0/24 destination: 0.0.0.0/0 pool member: A)Do you use a pool has only " pool member A " if you do this , it's normal to see this behavior , and you should add pool member B to the pool that attached to "192.168.40.0/24 destination: 0.0.0.0/0" .and you use another powerful way without irules to make the connections go to Pool member A , and when it fails connections will go to pool member B.and when Pool member A returns UP , the Connection will return back to pool member A.&nbsp;This Powerful feature called : Priority Group Activation ( PGA ) on pool.&nbsp;So now you Plan of action (POA) :&nbsp;1) Create pool contains two members ( Pool member A , B ).2) enable Priority Group activation on this pool , and use this Article :&nbsp;https://my.f5.com/manage/s/article/K13525153#:~:text=About%20Priority%20Group%20Activation%3A,a%20pool%20member's%20properties%20screen.3) attach this pool to the Virtual server that hosts source ( 192.168.40.0/24).&nbsp;4) Test your implementation , by monitor that all traffic goes to Pool member A and then if Pool Member A disabled/Down , the new traffic will be directed to Pool member B , and if pool member A become up the new connections will go to pool member A again.&nbsp;Piece of Configuration :&nbsp;1) enable Priority group activation.2) give Pool member A &gt;&gt;&gt; 10 for example and give pool member B &gt;&gt;&gt; 5 for example.3) Select Less Than &gt;&gt;&gt; 1&nbsp;Test it and let me know&nbsp;

paulius · Answer

young19918 The following articles have gone over some of this and might point you in the right direction.
https://community.f5.com/t5/water-cooler/load-balancing-between-different-isp/m-p/313437
https://community.f5.com/t5/technical-forum/load-balance-between-two-isps-using-ltm/m-p/215621
https://community.f5.com/t5/technical-forum/deploying-isp-load-balancing/m-p/223641
https://community.f5.com/t5/technical-forum/basic-isp-load-balancing-setup/m-p/261238
&nbsp;

young19918 · Answer

Hi&nbsp;Paulius&nbsp;,Thanks for your reply.It looks like these links don't have the content I need...

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ISP load balance application

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