Tripp Lite NGI-M08C4-L2, Owner'S Manual

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Table 3
PPPoE IA Remote ID Sub-option Format
SubOpt Length Value
N
(1 byte)
0x02
(1 byte)
MAC Address or String
(64 bytes)
The 0x01 in the first field identifies this as an Agent Circuit ID sub-option and 0x02 identifies
this as an Agent Remote ID sub-option. The next field specifies the length of the field. The Switch
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)
WT-101 Default Circuit ID Syntax
If you do not configure a Circuit ID string for a specific VLAN on a port or for a specific port,
and no set the flexible Circuit ID syntax in the Switch, the Switch automatically generates a
Circuit ID string according to the default Circuit ID syntax which is defined in the DSL Forum
Working Text (WT)-101. The default access node identifier is the hostname of the PPPoE
intermediate agent and the eth indicates “Ethernet”, and the slot id is 0.