two interface in one router connect to two L3 device as Load balancer or FW

[engahmad8]

Dears 

I have one router connect to ISP and I have 2 L3 devices 

I need to connect this router to it 

IP subnet between this 2 device should be same 

however, need  to configure two interface to connect both L3 devices 

I need your help with out using switch between router and L3 devices 

Thanks 

[Georg Pauwen]

Hello,

post a schematic drawing of what you want your topology to look like...

[engahmad8]

you can see topology in attach file 

[paul driver]

Hello

Your topology attached doesn't replicate the setup you stated?

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@engahmad8 wrote:

I have one router connect to ISP and I have 2 L3 devices 

 I need to connect this router to it 

 IP subnet between this 2 device should be same 

 however, need  to configure two interface to connect both L3 devices 

I need your help with out using switch between router and L3 devices 

---

[engahmad8]

this digram is represent with two ISP

we can ignore isp 2 router and look to isp1 router with both f5 LC 

[engahmad8]

update digram