Thanks for your reply.
Here am attaching the Firewall configuration related to this part ;
set interfaces ge-15/0/1 enable
set interfaces ge-15/0/1 gigether-options redundant-parent reth1
set interfaces ge-15/0/2 enable
set interfaces ge-15/0/2 gigether-options redundant-parent reth1
set interfaces reth1 redundant-ether-options redundancy-group 1
set interfaces reth1 redundant-ether-options minimum-links 1
set interfaces reth1 redundant-ether-options lacp passive
set interfaces reth1 redundant-ether-options lacp periodic slow
set interfaces reth1 unit 0 family inet address 192.168.50.2/24 primary
set interfaces reth1 unit 0 family inet address 192.168.51.2/24
set security zones security-zone trust address-book address FirewallAddress 192.168.50.2/32
set routing-instances TRAFFIC routing-options static route 192.168.31.0/24 next-hop 192.168.50.1
set routing-instances TRAFFIC routing-options static route 192.168.32.0/24 next-hop 192.168.50.1
set routing-instances TRAFFIC routing-options static route 192.168.11.0/24 next-hop 192.168.50.1
set routing-instances TRAFFIC routing-options static route 192.168.22.0/24 next-hop 192.168.50.1
set routing-instances TRAFFIC routing-options static route 192.168.70.0/24 next-hop 192.168.50.1
set routing-instances TRAFFIC routing-options static route 192.168.24.0/24 next-hop 192.168.50.1
set routing-instances TRAFFIC routing-options static route 192.168.21.0/24 next-hop 192.168.50.1
My doubt is LACP 2 with IP 192.168.50.0 is active , While switching to Node 1 Firewall the subnet is 192.168.51.0, I didnt see any entry like that and addressbook entry. Please refer.