What will happen for the pool redirection if all members are down

need to know why some requests which supposed to go to pool_X are going to default pool.is there any other irule on the virtual server? i guess it might have since you set priority 10 to the event.

anyway, just a quick confirm. when Pool_X is down, bigip won't send traffic to Default_Pool and client will receive reset.

[root@ve10:Active] config  b virtual bar list
virtual bar {
   snat automap
   destination 172.28.19.79:80
   ip protocol 6
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
   switch -glob [HTTP::path] {
      "/xyz*" -
      "/YwZ*" -
      "/AbC*" {
         pool Pool_X
      }
      default {
         pool Default_Pool
      }
   }
}
}
[root@ve10:Active] config  b pool Pool_X list
pool Pool_X {
   monitor all fake
   members 200.200.200.111:80 {}
}
[root@ve10:Active] config  b pool Default_Pool list
pool Default_Pool {
   members 200.200.200.101:80 {}
}

[root@ve10:Active] config  b pool Pool_X
POOL Pool_X  LB METHOD round robin   MIN/CUR ACTIVE MEMBERS 0/0
|     (cur, max, limit, tot) = (0, 0, 0, 0)
|     (pkts,bits) in = (0, 0), out = (0, 0)
+-> POOL MEMBER Pool_X/200.200.200.111:80   inactive,down
    |     session enabled    priority 0    ratio 1
    |     (cur, max, limit, tot) = (0, 0, 0, 0)
    |     (pkts,bits) in = (0, 0), out = (0, 0)
    |     requests (total) = 0

[root@ve10:Active] config  tcpdump -nni 0.0 not host 200.200.200.10 and port 80
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on 0.0, link-type EN10MB (Ethernet), capture size 108 bytes
01:50:36.809874 IP 172.28.20.11.59060 > 172.28.19.79.80: S 2018743163:2018743163(0) win 5840 
01:50:36.809921 IP 172.28.19.79.80 > 172.28.20.11.59060: S 1900520667:1900520667(0) ack 2018743164 win 4380 
01:50:36.810630 IP 172.28.20.11.59060 > 172.28.19.79.80: . ack 1 win 46 
01:50:36.810720 IP 172.28.20.11.59060 > 172.28.19.79.80: P 1:171(170) ack 1 win 46 
01:50:36.810842 IP 172.28.19.79.80 > 172.28.20.11.59060: R 1:1(0) ack 171 win 4550