Cisco VG204 Software Configuration Guide - Page 36

Configuring the MAC Address Convention Chapter 4 Configuring Voice Step 19 Command or Action associate ccm identifier-number priority priority-number Step 20 Example: VG(config)# associate ccm 1 priority 1 dial-peer voice tag pots Example: VG(config)# dial-peer voice 999000 pots Step 21 service stcapp Step 22 Example: VG(config)# service stcapp port port-number Step 23 Example: VG(config)# service stcapp exit Example: VG(config)# exit Purpose Associates a Cisco Unified CallManager with a Cisco CallManager group and establishes its priority within the group. Defines a particular dial peer, to specify the method of voice encapsulation, and to enter dial-peer configuration mode. Tag defines a particular dial peer. The tag range is from 1 to 2147483647. The POTS peer uses VoIP encapsulation on the IP backbone. Enables STC application feature service. Configures the port number. Exits to global configuration mode. Configuring the MAC Address Convention The VG202 and VG204 voice gateways use the MAC address of the Skinny Call Control Protocol (SCCP) local interface to define unique MAC addresses for each voice port by using the last 9 digits of the SCCP local interface of the voice gateway. For example, if the source interface MAC address is 000C.8639.5833, the MAC address of the voice port MAC address will be C863.9583.3XXX. In the preceding example, the last 9 digits of the SCCP of the local VG202 or VG204 voice gateway become the first 9 digits of the voice port MAC address after dropping the leading 000. The last 3 digits of the voice port MAC address is the slot number (3-bit) + subunit number (2-bit) + port number (7-bit) in hexadecimal format. You combine the digits to get the last three MAC address digits. For example, the voice-port 0/0 is slot number 0 (000): subunit 0 (00) and port number 0 (0000000). By stringing the digits together, you get the following: 0000 0000 0000 = 0 0 0. This means that if the source interface MAC address is 001f.cac3.b3f8, the MAC address of voice port 0/0 will be 1FCAC3b3f8000. Table 4-1 shows the voice port to MAC address conversion table. 4-10 Cisco VG202 and Cisco VG204 Voice Gateways Software Configuration Guide OL-16191-01