Voice access-list problem

From: Prakash H Somani (pdsccie@rediffmail.com)
Date: Sat Sep 21 2002 - 04:33:25 GMT-3


Hi Group,

Various places we have seen Voice access-list but strange its not
working in my config:

  R7 ----IP Network ----- R2

Config of R7:

dial-peer voice 70 pots
  destination-pattern 7777
  port 4/0/0
!
dial-peer voice 20 voip
  destination-pattern 2222
  session target ipv4:204.100.100.177

R7#sh runn int s6/0.5
Building configuration...

Current configuration : 147 bytes
!
interface Serial6/0.5 point-to-point
  ip address 204.100.100.146 255.255.255.240
  ip access-group 101 in
  frame-relay interface-dlci 705
end

R7#sh acce
R7#sh access-l
R7#sh access-lists
Extended IP access list 101
     permit tcp any any eq 1720 (22 matches)
     permit tcp any eq 1720 any
     permit tcp any eq bgp any (16 matches)
     permit tcp any any eq bgp (25 matches)
     permit udp any any range 16384 32767 log
     permit ospf any any (65 matches)

COnfig or R2:

R2#sh runn | begin dial-pee
dial-peer voice 20 pots
  destination-pattern 2222
  port 1/0/0
!
dial-peer voice 70 voip
  destination-pattern 7777
  session target ipv4:204.100.100.146
!
!interface Serial0/0.5 point-to-point
  ip address 204.100.100.177 255.255.255.240
  no ip directed-broadcast
  frame-relay interface-dlci 205

Symptoms:

1. Voice call gets established but no RTP / UDP packet transfer.
*You can not hear the opposite end voice)

2. If I add one more line in ACL 101 "permit tcp any any",
everything works fine and I could see UDP packet log also...

Which extra port do I need to open for End-to-End communication?

regards....Prakash



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