IES4005M User’s Guide 151
CHAPTER 21
PPPoE Intermediate Agent
Use these commands to have the IES to add a vendor-specific tag to PADI (PPPoE Active Discovery
Initiation) and PADR (PPPoE Active Discovery Request) packets from PPPoE clients. This tag gives a
PPPoE termination server additional information (such as the port number, VLAN ID, and MAC
address) that the server can use to identify and authenticate a PPPoE client.
If the PPPoE intermediate agent is enabled for a VLAN, the IES adds a vendor-specific tag to PADI
(PPPoE Active Discovery Initialization) and PADR (PPPoE Active Discovery Request) packets from
the VLAN’s PPPoE clients. This tag is defined in RFC 2516 and has the following format for this
feature.
The Tag_Type is 0x0105 for vendor-specific tags, as defined in RFC 2516. The Tag_Len indicates the
length of Value, i1 and i2. The Value is the 32-bit number 0x00000DE9, which stands for the “ADSL
Forum” IANA entry. i1 and i2 are PPPoE intermediate agent sub-options, which contain additional
information about the PPPoE client.
Table 103 PPPoE intermediate agent vendor-specific tag format
Tag_Type
(0x0105)
Tag_Len Value i1 i2
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