b snat translation <ip> udp timeout immediate

Hello -

 

We are working with a call center VOIP vendor and are experiencing some integration issues. The primary problem is that the vendor cannot work with ephemeral ports. If the F5's connection table is population with a connection say:

 

src -ip:port des-ip:port

 

If another connection occurs from the same scr ip to the same dest ip and port,, the LTM will use an ephemeral src port. Standard behavior. But the vendor's product will not respond to the ephemeral port but to the standard SIP port 5060.

 

The VOIP vendor recommeded changing the udp timeout of a snat translation to "immediate" . The man pages on the LTM indicates that this a valid command. However , when executed , the following occurs:

 

 

b snat translation udp timeout immediate

 

BIGpipe SNAT translation address creation error:

 

01070149:3: Translation address cannot have a zero udp idle timeout.

 

Here is a snip from the man page

 

bigpipe snat translation {}

 

bigpipe snat translation ( │ all) \

 

[{] [}]

 

::=

 

 

::=

 

addr ( │ none)

 

arp (enable │ disable)

 

(enable │ disable)

 

ip timeout ( │ immediate │ indefinite)

 

limit

 

tcp timeout ( │ immediate │ indefinite)

 

udp timeout ( │ immediate │ indefinite)

 

unit

 

 

We are running on 1600s Version 10.2.4

 

 

Any suggestions , work arounds would be greatly appreciated.

 

Thanks -jim