Phone TFTP config Download and ACL on the way

Hi,

TFTP and the Softswitch are located on 2 different server, for the TFTP side I allowed the phone to see only TFTP port on that server as below ACL :

Phones get DHCP info + TFTP option from the local router , here is the ACL on the router

 

ip access-list extended voice

permit ip 172.31.10.0 0.0.0.255 host 1.1.1.1  (1.1.1.1 is the softswitch & 172.31.10.0 is the phone IP range) 

permit udp 172.31.10.0 0.0.0.255 host 1.1.1.2 eq TFTP   (1.1.1.2 is the TFTP server)

 

***** My question is ,

Although in the ACL log I see that tftp line has matches but when I telnet to the phone shows the TFTP 0.0.0.0 (I have option 150 in the router DHCP to pass 1.1.1.2 as the TFTP server)

Am I missing something in my ACL? or Concept wise is this possible?

 

Thx.

 

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