SRTP config example for voip trunks

[kursatcoban]

SRTP config example for voip  trunks

[William Bell · Accepted solution]

MGCP doesn't fit your requirements but you could use h323. You would need to configure ipSec to support the call signaling (if you want) and SRTP to support the media. Here is a Cisco write up on Media and Signaling encryption for IOS gateways:

https://www.cisco.com/en/US/docs/ios/12_4t/12_4t11/htsecure.html

HTH.

Regards,

Bill

[Marwan ALshawi]

if you use IPsec and you have any concern about QOS make sure to enable pre classify feature on the ipsec tunnel for QOS to make sure you keep the traffic marking and to avoid any qos issues

[William Bell]

I think that the original poster is looking for information on SRTP not SRST.

[Marwan ALshawi]

thanks for that

[kursatcoban]

Hi All ,

I found it , here is the sample config

voice-card 1
codec complexity high
local-bypass

conf t
voice service  voip
sip 
url sip
srtp negotiate cisco
exit
exit

conf t
dial-peer voice xxx voip
srtp
srtp system
security mode encrypted
exit

regards,

Kursat

[xiangyong chu]

Hi,

can i ask some question about the SRTP protocol?

1. how can i configure the SRTP protocol for bandwidth guarantee in QOS rules;

2. what is the SRTP port used?

3. what is the ios for the SRTP command in dial-peer?