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INS_CWGE24MS2_REV–
10/05/16 PAGE 161
INSTALLATION AND OPERATION MANUAL
CWGE24MS2
TECH SUPPORT: 1.888.678.9427
takes the Circuit ID string you manually configure for a VLAN on a port as the highest priority and
the Circuit ID string for a port as the second priority. In addition, the Switch puts the PPPoE client’s
MAC address into the Agent Remote ID Sub-option if you do not specify any user-defined string.
Flexible Circuit ID Syntax with Identifier String and Variables
If you do not configure a Circuit ID string for a VLAN on a specific port or for a specific port, the
Switch adds the user-defined identifier string and variables into the Agent Circuit ID Sub-option.
The system variables can be the host name of the access node (Switch), the port number of the
PPPoE client and/or the VLAN ID on the PPPoE packet.
Table 4 PPPoE IA System Variable
System Variable
Description
%HOSTNAME
Host name of access node(Switch)
%SPACE
Space key(ASCII 0x20)
%PORT
Port number of the client
%SVLAN
Service provider VLAN ID
%CVLAN
Client VLAN ID
PS. %SVLAN equal to %CVLAN
Users can freely combined circuit ID, using the ‘+’ symbol to links system variables and identifier
strings, in order to meet specific requirements.
EX: CLI Command
pppoe intermediate-agent format-type user-defined %H%SPACE+atm+%SPACE+/0/0/
+%PORT+:+%CVLAN
Table 5: PPPoE IA Circuit ID Sub-option Format: User-defined String and Variables
SubOpt Length Value
.
N
(1 byte)
0x01
(1 byte)
Host Name
(x bytes)
Space
(1 byte)
atm
(3 bytes)
Space
(1 byte)
/0/0/
(5 bytes)
Port ID
(2 bytes)
:
(1 byte)
CVLAN ID
(4 bytes)