Sir,
It is random. there is no pattern. Sometimes it will occur in a week time, sometimes in day. No changes have been done in the configuration of both the appliances in HA.
SLDCFW1> fw ctl pstat
System Capacity Summary:
Memory used: 26% (278 MB out of 1050 MB) - below watermark
Concurrent Connections: 0% (659 out of 149900) - below watermark
Aggressive Aging is not active
Hash kernel memory (hmem) statistics:
Total memory allocated: 243269632 bytes in 59392 (4096 bytes) blocks using 33 pools
Initial memory allocated: 109051904 bytes (Hash memory extended by 134217728 b ytes)
Memory allocation limit: 550502400 bytes using 512 pools
Total memory bytes used: 116356012 unused: 126913620 (52.17%) peak: 24193 9756
Total memory blocks used: 35562 unused: 23830 (40%) peak: 60503
Allocations: 3262024670 alloc, 0 failed alloc, 3260633066 free
System kernel memory (smem) statistics:
Total memory bytes used: 349864864 peak: 403020728
Total memory bytes wasted: 28022060
Blocking memory bytes used: 2750408 peak: 12855652
Non-Blocking memory bytes used: 347114456 peak: 390165076
Allocations: 3389427 alloc, 0 failed alloc, 3385089 free, 0 failed free
vmalloc bytes used: 109051904 expensive: yes
Kernel memory (kmem) statistics:
Total memory bytes used: 222070136 peak: 373400212
Allocations: 3265395659 alloc, 0 failed alloc
3264001638 free, 0 failed free
External Allocations: 704 for packets, 704691 for SXL
Cookies:
2012119669 total, 0 alloc, 0 free,
2072498 dup, 2690536971 get, 393294664 put,
2878473172 len, 4023850 cached len, 73972 chain alloc,
73972 chain free
Connections:
24593355 total, 9276636 TCP, 15314052 UDP, 978 ICMP,
1689 other, 0 anticipated, 8369 recovered, 659 concurrent,
5646 peak concurrent
Fragments:
4815121 fragments, 2398853 packets, 2572 expired, 0 short,
0 large, 0 duplicates, 0 failures
NAT:
327012559/0 forw, 380483894/0 bckw, 380241268 tcpudp,
267608 icmp, 16283046-15849385 alloc
Sync:
Version: new
Status: Able to Send/Receive sync packets
Sync packets sent:
total : 70226126, retransmitted : 200, retrans reqs : 31, acks : 2005 095
Sync packets received:
total : 18420816, were queued : 687, dropped by net : 32
retrans reqs : 172, received 506532 acks
retrans reqs for illegal seq : 0
dropped updates as a result of sync overload: 0
Callback statistics: handled 501775 cb, average delay : 1, max delay : 6
The above output is after the standby is rebooted.
SLDCFW1> cphaprob stat
Cluster Mode: High Availability (Active Up) with IGMP Membership
Number Unique Address Assigned Load State
1 (local) 10.231.149.1 100% Active
2 10.231.149.2 0% Standby
I am not sure how long it will stay in standby mode.