SRX Services Gateway
SRX Services Gateway

Juniper SIP Config from Cisco

‎03-07-2012 09:12 AM



Running Junos 11.1R4.4


I have been asked to quickly transfer a cisco config to a juniper srx for basic routing of a SIP connection.  The Cisco device was an old 2600 which had died.


All appeared fine until users reported calls dropping and phones being unusable for 20 minutes or so, randomly.  However I cannot establish if this had happened with the cisco in place!  People say they didnt think so etc.


The cisco config is below, it is pretty basic, I just want some input as to the configuration you would use on the juniper srx in question,  basically I set up a Virtual router using 2 ports, simple stuff, polocies in and out to match the Cisco config.


The part I am most interested in is "ip pim bidir-enable" on the cisco, am I right in saying Junos this bidirectional multicast is enabled by default?


interface FastEthernet0/0
 description *** WAN interface - SIP Trunk to ISP(SIP Provider)**                                                                              *
 ip address xx.xx.xx.194
 ip access-group 101 in
 ip nat outside
 speed 100
interface Serial0/0
 no ip address
interface Ethernet1/0
 description *** LAN Interface connected to NEC system ***
 ip address
 ip nat inside
ip nat inside source list 1 interface FastEthernet0/0 overload
ip nat inside source static
ip classless
ip route
no ip http server
ip pim bidir-enable
access-list 1 permit
access-list 101 permit ip host
line con 0
 login local
line aux 0
line vty 0 4
 login local



[Please Mark My Solution Accepted if it Helped, Kudos are Appreciated Too]