4-10
Cisco VG202 and Cisco VG204 Voice Gateways Software Configuration Guide
OL-16191-01
Chapter 4 Configuring Voice
Configuring the MAC Address Convention
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: 000
0
0
000 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 1FCAC3b3f8
000
.
Table 4-1
shows the voice port to MAC address conversion table.
Step 19
associate ccm
identifier-number
priority
priority-number
Example:
VG(config)# associate ccm 1 priority 1
Associates a Cisco Unified CallManager with a Cisco
CallManager group and establishes its priority within the
group.
Step 20
dial-peer voice
tag
pots
Example:
VG(config)# dial-peer voice 999000 pots
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.
Step 21
service stcapp
Example:
VG(config)# service stcapp
Enables STC application feature service.
Step 22
port
port-number
Example:
VG(config)# service stcapp
Configures the port number.
Step 23
exit
Example:
VG(config)# exit
Exits to global configuration mode.
Command or Action
Purpose
