Use the Ice window to set ICE parameters for a SIP trunk group. Interactive Connectivity Establishment (ICE) is a protocol for Network Address Translator (NAT) traversal for multimedia sessions established with the offer/answer model. ICE uses the Session Traversal Utilities for NAT (STUN) protocol and its extension that is, Traversal Using Relay NAT (TURN). ICE uses STUN and TURN servers to overcome network address translation issues that can occur when an endpoint is situated behind a NAT device.
Note
This section controls only the IP type (IPv4 and IPv6) negotiations in the ICE protocol. Enable Ice Support on Services - NAT Traversal for SBC to consider ICE processing on a call leg.
To View and Edit ICE IP Address Type Negotiation Preference
On the SBC main screen, go to All > Address Context > Zone > SIP Trunk Group > Media > Ice or
Configuration > System Provisioning > Category: Trunk Provisioning > Trunk Group > SIP Trunk Group > SIP Trunk Advanced > SIP Trunk - Media - Advanced > Ice
The Ice window is displayed.
Note
The ICE parameters are displayed only when the parameter Media Addr Type for the SIP trunk group is defined as IPv4 and IPv6 and NAT Traversal Ice Support is selected on the corresponding SIP trunk group.
Use the drop-down boxes to select the desired Address Context, Zone and SIP Trunk Group.
The Edit Ice window is displayed.
Figure 1: Advanced Media - Ice Window
The following parameters are displayed:
Table 1: SIP Trunk Group - Media - ICE Parameters
Parameter | Description |
|---|---|
| Offer Preference | This parameter specifies the offer version precedence when the SDP method is ICE. The options are:
|
| Answer Preference | This parameter specifies the answer version precedence when the SDP method is ICE. The options are:
|
Make the required changes and click Save at the right hand bottom of the panel to save the changes made.
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