Cisco Catalyst 4500 Series Configuration Manual page 1089

Configuring the PPPoE Intermediate Agent
DSL Forum TR-101 [1] offers a means by which the PPPoE Discovery packets are tagged at the service
provider's access switch with subscriber line specific information. The mechanism specifies using VSA
of the PPPoE Discovery packets to add the line specific information at the switch. Even though you can
perform Subscriber Line Identification (SLI) in another way (recreating virtual paths and circuits using
stacked VLAN tags), DSL Forum 2004-071 [4] recommends the PPPoE Intermediate Agent mechanism.
It cites lower provisioning costs and simpler co-ordination between OSS systems in charge of access
switch and BRAS. PPPoE Intermediate Agent helps the service provider, BRAS, distinguish between
end hosts connected over Ethernet to an access switch.
This chapter describes PPPoE Intermediate Agent on Catalyst 4500 series switches. It includes the
following sections:
About PPPoE Intermediate Agent, page 45-2
•
Enabling PPPoE IA on a Switch, page 45-2
•
Configuring the Access Node Identifier for PPPoE IA on a Switch, page 45-2
•
Configuring the Identifier String, Option, and Delimiter for PPPoE IA on an Switch, page 45-3
•
• Configuring the Generic Error Message for PPPoE IA on an Switch, page 45-3
• Enabling PPPoE IA on an Interface, page 45-4
• Configuring the PPPoE IA Trust Setting on an Interface, page 45-4
• Configuring PPPoE IA Rate Limiting Setting on an Interface, page 45-4
• Configuring PPPoE IA Vendor-tag Stripping on an Interface, page 45-5
• Configuring PPPoE IA Circuit-ID and Remote-ID on an Interface, page 45-5
Enabling PPPoE IA for a Specific VLAN on an Interface, page 45-5
•
Configuring PPPoE IA Circuit-ID and Remote-ID for a VLAN on an Interface, page 45-6
•
For complete syntax and usage information for the switch commands used in this chapter, first look at
Note
the Cisco Catalyst 4500 Series Switch Command Reference and related publications at this location:
http://www.cisco.com/en/US/products//hw/switches/ps4324/index.html
If the command is not found in the Catalyst 4500 Series Switch Command Reference, it will be found in
the larger Cisco IOS library. Refer to the Cisco IOS Command Reference and related publications at this
location:
http://www.cisco.com/en/US/products/ps6350/index.html
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Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
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