Hi aarseniev,
This is my plan :
Site A srx210 site-site vpn with SSG5 is up and working now ! (ISP 1)
Site A srx210 site-site vpn with SRX210 should work now with same intranet n/w ( already i brought this up with ISP2 ) , but at Site B there is no communication between srx and ssg5 (both are parallel ) .
If ISP1 goes down SSG5 won't communicate with SiteA , so i manually connect intranet switch to SRX210 (Internet will work ) but issue with site-site vpn ( i have to eshtablish site-site vpn with SiteA srx to SiteB srx )
1) what is the best way to cofigure Site A to SiteB vpn case A) SSG5 goes down it should work with SRX . SSG is my primay
2) or can i use srx210 with dual ISP at Site B and eshtablish vpn with site A . Means Site A single GW , site B dual GW with Same intranet , Can i do this ?