HI, I want to get source port of client from Real server, but it is changed by ACE
matched port of VIP set to 8070 same as RIP, it is fine.
I want to know is it posible to keep souce port unchanged when port translation is configured
any help will be appreciated
below is the config
probe udp udp-8070
ip address 192.168.1.15
ip address 192.168.1.16
serverfarm host sf-UDP-8070
rserver server01 8070
rserver server02 8070
policy-map type loadbalance first-match pL7-UDP-8070
class-map match-any c4-UDP-1270
match virtual-address 192.168.2.100 udp eq 1270
policy-map multi-match pL4-UDP
loadbalance vip inservice
loadbalance policy pL7-UDP-8070
loadbalance vip icmp-reply
interface vlan 211
service-policy input pL4-UDP
This is called implicit pat. It is happening to guarantee that the response from the server is handled by the same IXP.
The ACE module contains 2 x IXP and each one of them perform the loadbalancing functions indepently.
So, it is required that the 2 flows of a connection are handled by the same IXP. The function that select the IXP does it base on the destination and source port. Therefore it is sometimes required to change the source port.
There is no way to prevent this.
The appliance does not have this problem because there is only a single processor.