Expressway-E,C not voice. RTP traffic

[Sergey Ptushkin]

Hello, we have Expressway with "One lan" topology

Expressway - C {192.168.1.187}

Expressway - E {192.168.1.188}

Expressway - E have access to internet via gateway cisco 3825

sh run

...

ip nat inside source static 192.168.1.188 195.112.xxx.xxxx

...

Jabber client outside register on CUCM - it's OK , but not inbound\outbound voice activity, RTP .

Why?

p.s Firewall disabled 

 diagnostic_log_expressway-c_2015-09-30_03-02-58.zip  log , and pcap file from Expressway-C.

Please help me (((

[Guillermo_87]

Hi Sergey Ptushkin

Do you have been able to find the solucion to RTP?

I have the same problem :(

[Ayodeji Okanlawon]

Did you configure nat reflection? Did you point expwc to the global ip/natted ip of expressway-e? Did you use static nat on expwe? have you disabled sip inspection on firewall?

[Guillermo_87]

I am configured nat in cisco IOS 3945

ip nat inside source static 10.10.1.56 195.112.xxx.xxxx

[Ayodeji Okanlawon]

Please read the deployment guide. You need to configure nat reflection. Your expwc must be able to reach the global ip of your expwe

[Guillermo_87]

Do you have any example of nat reflection in cisco IOS?

[Ayodeji Okanlawon]

unfortunately I dont. You can post this on the seucrity forum, I am sure there will be people who can help there

[Guillermo_87]

Hi Guys,

My jabber with MRA without VPN work fine.

Thanks

[heathrw]

Hi,

If you have split DNS and just a single router for internet, I would advise to setup the second NIC, option keps are now included as part of collab edge solutions. Saves passing the ExpC <> ExpE traffic through a firewall/router and comes in handy for troubleshooting.