How to config PBR

wouldn't F5 modified dst ip of packets to next hop ip address of a member selected? What we want is just to send it out the way we want but not to alter its dst ip. when creating wildcard virtual server, by default translate address and service are disabled. so, destination address won't be changed when packet is sending out.

[root@iris:Active] config  b virtual test list all
virtual test {
   enable
   limit 0
   rate class none
   mirror disable
   translate address disable
   translate service disable
   srcport preserve
   pool
   snat none
   cmp enable
   cmp processor none
   lasthop pool none
   snatpool none
   pool gw1
   fallback persist none
   destination any:any
   mask 0.0.0.0
   ip protocol tcp
   partition Common
   rules none
   httpclass none
   persist none
   auth none
   clone pools none
   profiles tcp {
         all
      }
   traffic classes none
   vlans none disable
}
[root@iris:Active] config  b pool gw1 list
pool gw1 {
   members 172.28.17.254:any {}
}
[root@iris:Active] config  b route list
No Routing Table Entries were found.

[root@iris:Active] config  tcpdump -nni 0.0 -e 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
12:13:18.896745 00:01:d7:20:81:85 > 00:01:d7:2f:0d:c3, ethertype 802.1Q (0x8100), length 78: vlan 4094, p 0, ethertype IPv4, 10.10.72.60.59619 > 8.8.8.8.80: S 865485221:865485221(0) win 5840 
12:13:18.896802 00:01:d7:2f:0d:c3 > 00:01:d7:20:81:85, ethertype 802.1Q (0x8100), length 82: vlan 4094, p 0, ethertype IPv4, 8.8.8.8.80 > 10.10.72.60.59619: S 1705596133:1705596133(0) ack 865485222 win 4380 
12:13:18.897850 00:01:d7:20:81:85 > 00:01:d7:2f:0d:c3, ethertype 802.1Q (0x8100), length 70: vlan 4094, p 0, ethertype IPv4, 10.10.72.60.59619 > 8.8.8.8.80: . ack 1 win 46 
12:13:18.897925 00:01:d7:2f:0d:c4 > 00:01:e8:d5:d4:47, ethertype 802.1Q (0x8100), length 82: vlan 4093, p 0, ethertype IPv4, 10.10.72.60.59619 > 8.8.8.8.80: S 3006714883:3006714883(0) win 4380 

5 packets captured
5 packets received by filter
0 packets dropped by kernel

[root@iris:Active] config  b arp 172.28.17.254
ARP 172.28.17.254 - 00:01:E8:D5:D4:47   VLAN external   expire 269s   resolved