Pppoe - ZyXEL Communications XS3800-28 User Manual

WT - 101 De fa ult C irc uit ID Synta x
If you do not configure a Circuit ID string for a specific VLAN on a port or for a specific port, and disable
the flexible Circuit ID syntax in the
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 host name of the PPPoE intermediate
agent and the eth indicates "Ethernet".
Table 155 PPPoE IA Circuit ID Sub-option Format: Defined in WT-101
SubOpt Length
0x01 N
(1 byte) (1 byte)
34.1.2.3 Po rt Sta te
Every port is either a trusted port or an untrusted port for the PPPoE intermediate agent. This setting is
independent of the trusted or untrusted setting for DHCP snooping or ARP inspection. You can also
specify the agent sub-options (circuit ID and remote ID) that the Switch adds to PADI and PADR 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.
• If a PADI or PADR packet is sent from a PPPoE client but received on a trusted port, the Switch
forwards it to other trusted ports.
Note: The Switch will drop all PPPoE discovery packets if you enable the PPPoE intermediate
agent and there are no trusted ports.
Untrusted ports are connected to subscribers.
• If a PADI, PADR, or PADT packet is sent from a PPPoE client and received on an untrusted port, the
Switch adds a vendor-specific tag to the packet and then forwards it to the trusted ports.
• The Switch discards PADO and PADS packets which are sent from a PPPoE server but received on an
untrusted port.
34.2 PPPo E
Use this screen to configure the PPPoE Intermediate Agent on the Switch.
Click
Adva nc e d Applic a tio n
to go to the
He re
Advanced Application > PPPoE > Intermediate Agent
Fig ure 276
Chapter 34 PPPoE
>
PPPo E
Access Space eth
Node
(1 (3
Identifier
byte) byte)
(20 byte)
> in the navigation panel to display the screen as shown. Click
PPPo E
screen.
Inte rm e dia te Ag e nt
XS3800-28 User's Guide
screen, the Switch automatically
Inte rm e dia te Ag e nt
Value
Space Slot ID /
(1 (1 (1
byte) byte) byte)
361
Port No : VLAN ID
(2 byte) (1 (4
byte) bytes)
C lic k