Tripp Lite NGI-M08C4POE8-2, Руководство пользователя

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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.
SubOpt Length Value
N
(1 byte)
0x01
(1 byte)
Access node
identifier
Space
(1 byte)
eth
(3 bytes)
Space
(1 byte)
Slot ID
(1 byte)
Port ID
(2 bytes)
:
(1 byte)
CVLAN ID
(4 bytes)
/
(1 byte)
Port
State
Every port is either a trusted port or an untrusted port for the PPPoE intermediate agent. This
setting is independent of the trusted/untrusted setting for DHCP snooping. Youcan also specify
the agent sub-options (circuit ID and remote ID) that the Switch adds to PADI andPADR packets
from PPPoE clients.
Trusted ports are connected to PPPoE servers.

If a PADO (PPPoE Active Discovery Offer), PADS (PPPoE Active Discovery Session-
confirmation),or PADT (PPPoE Active Discovery Terminate) packet is sent from a PPPoE
server and received on a trusted port, the Switch forwards it to all other ports.