16.11 High-Level Configuration

This topic describes the high-level configuration procedure for implementing SAF and CCD.

Configure SAF network:

  • Configure SAF forwarders on Cisco IOS routers.
    1. Specify same autonomous system on all SAF forwarders.

Implement internal SAF client:

  • Configure trunk profile with IP to use for call setup.
  • Configure directory number blocks to be advertised.
  • Configure call control profile referring to directory number blocks and trunk to be used.
  • Configure actual CCD process (channel) referring to SAF forwarder by autonomous system number.
    1. Enable advertising service by referring to call control profile.
    2. Enable requesting service.
  • Configure VoIP dial peer referring to SAF.

The first main configuration task is to enable SAF in the network. You must configure SAF forwarder functionality on a Cisco IOS router. All SAF forwarders must share the same SAF autonomous system number. You can specify the interface that should be used by the SAF forwarder.

When you use internal SAF clients, you must perform these main configuration tasks:

  1. Configure a trunk profile and specify the interface and the protocol to use for call signaling.
    Note

    The IP address (interface) that is used for call signaling can be different from the IP address that is used by the SAF forwarder.

  2. Configure the directory number blocks to be advertised.
  3. Configure a call control profile that refers to the directory number blocks and the trunk profile to be used.
  4. Configure the actual CCD process (“channel”) that refers to the SAF forwarder by its autonomous system number. Then perform these tasks:
    1. Enable the CCD advertising service by referring to the call control profile.
    2. Enable the CCD requesting service.
  5. Configure a VoIP dial peer that refers to the SAF.

Implement external SAF client:

  • Add external SAF client (Cisco Unified Communications Manager) to SAF forwarder:
    1. Specify SAF ID, username, and password of external client.
    2. Map external SAF client to SAF autonomous system.
  • Add SAF forwarder (Cisco IOS router) to SAF client (Cisco Unified Communications Manager).
    1. Specify SAF ID, username, and password as configured at SAF forwarder.
  • Configure CCD at external SAF client:
    1. Configure SAF trunks.
    2. Configure hosted directory number patterns and hosted directory number groups.
    3. Configure CCD advertising service.
    4. Configure CCD requesting service and partition for learned patterns.

When you implement external SAF clients, you must perform these high-level configuration tasks:

  1. At the SAF forwarder (Cisco IOS router), add the external SAF client (Cisco Unified Communications Manager):
    1. Specify the SAF ID, username, and password of the external client.
    2. Map the external SAF client to the SAF autonomous system.
  2. At the external SAF client (Cisco Unified Communications Manager), add the SAF forwarder (Cisco IOS router):
    1. Specify the SAF ID, username, and password as configured at the SAF forwarder.
  3. Configure CCD at the external SAF client:
    1. Configure a SAF SIP or a SAF H.323 trunk.
    2. Configure the hosted DN patterns and hosted DN groups.
    3. Configure the CCD advertising service.
    4. Configure the CCD requesting service and the partition to be used for learned patterns.

Internal SAF Client Configuration Elements

This section describes the configuration elements of an internal SAF client.

Configuration Element Name Configuration Element Function
Trunk profile profile trunk-route: Configured with interface whose IP address should be used for signaling when setting up SAF calls.
DN block profile profile dn-block: Configured with patterns to be advertised (internal number and number used for PSTN backup).
Call control profile profile callcontrol: Refers to directory number block profiles and trunk profile.
SAF client “channel” channel: Configured with SAF client ID and autonomous system. Advertising and requesting services are enabled; the advertising service refers to the call control profile.
Dial peer dial-peer voice: Configured with destination-pattern .T and session target saf. This dial peer is the incoming and outgoing dial peer for a call sent to or received from SAF trunks.

The table shows the configuration elements of an internal SAF client, their functions, and the ways that they interact with each other.

Note

You can configure the advertising service and the requesting service independently of each other.

Relationships of Internal SAF Client Configuration Elements

This section describes the relationships of internal SAF client configuration elements.

The figure illustrates how internal SAF client configuration elements relate to each other.

Note

The configuration that is shown in the figure is one that you can do multiple times, if multiple SAF forwarder processes are configured in separate autonomous systems. Each SAF client “channel” must refer to another SAF autonomous system.

The CCD advertising service of a single SAF client channel can refer to multiple call control profiles. This capability allows the configuration of two trunk profiles (one SIP and one H.323 trunk per call control profile). Only one trunk is required.

External SAF Client Configuration Elements

This section describes the configuration elements of an external SAF client.

Configuration Element Name Configuration Element Function
SAF security profile Configured with username and password. Referenced from SAF forwarder.
SAF forwarder Points to a SAF forwarder. Configured with IP address of SAF forwarder. Refers to SAF security profile.
SAF trunks One SAF SIP trunk and one SAF H.323 trunk can be configured. These trunks are not configured with a destination IP address. The rest of the configuration is similar to normal SIP and H.323 trunks.
Hosted DN group Configured with PSTN failover strip digits and PSTN failover prepend digits. Refers to hosted directory number patterns.
Hosted DN pattern Directory number or directory number range to be advertised. Configured with PSTN failover strip digits and PSTN failover prepend digits; if not configured, hosted directory number group configuration is used. Applied to hosted directory number group.
Configuration Element Name Configuration Element Function
CCD advertising service Refers to hosted directory number group, SAF SIP trunk, and SAF H.323 trunk.
CCD requesting service Configured with route partition, learned pattern prefix, and PSTN prefix. Refers to SAF trunks.
Blocked learned patterns Configured with remote IP, remote call control identity, and learned pattern or learned prefix.

The tables show the configuration elements of an external SAF client, their functions, and the ways that they interact with each other.

Note

You can configure the CCD advertising service and the CCD requesting service independently of each other.

The configuration of blocked learned patterns is optional.

Relationship of External SAF Client Configuration Elements

This section describes the relationship of external SAF client configuration elements.

The figure illustrates how external SAF client configuration elements relate to each other.

Note

You can configure only a single CCD requesting service in your cluster. You can configure multiple blocked learned patterns, SAF forwarders, and SAF security profiles. You can configure one CCD SIP trunk and one CCD H.323 trunk. Only one trunk is required.