ZyXEL Communications MSC1000G User Manual page 50

Chapter 1 Getting to Know Your MSC
(customer tag) and an outer s-tag (service provider tag). The line card drops any tagged frames
received on the DTPVC. DTPVCs support DHCP relay, IGMP, IEEE 802.1x and PPPoE agent.
PPPoA-to-PPPoE (PAE) PVC
This feature allows the system to translate PPPoA packets to PPPoE packets (and vice versa) to
allow communication between CPE clients and an access concentrator (such as a BRAS) through the
switch.
PPPoE Intermediate Agent Information
Similar to DHCP relay option82, you can set the system to insert line information into client PPPoE
Active Discovery Initialization (PADI) packets. This allows a PPPoE termination server to identify
and authenticate a PPPoE client.
IEEE 802.1p Priority
The system uses IEEE 802.1p priority to assign priority levels to individual PVCs. The system can
also handle multiple IEEE 802.1p priority queues on a single PVC.
Classifier and Policy
You can create a policy to define actions to be performed on a traffic flow grouped by a classifier
according to specific criteria such as the IP address, port number or protocol type, and so on.
IEEE 802.1x Port-based Authentication
Your MSC supports the IEEE 802.1x standard for centralized user authentication through an
optional network authentication (RADIUS) server.
Spanning Tree Protocol (STP)/ Rapid STP (RSTP)/ Multiple STP (MSTP)
(R)STP detects and breaks network loops and provides backup links between switches, bridges or
routers. It allows a switch to interact with other (R)STP -compliant switches in your network to
ensure that only one path exists between any two stations on the network.
MSTP is backward compatible with (R)STP and allows you to configure multiple spanning trees for
one or more VLANs and still have a loop-free network topology.
Loop Guard
Loop guard protects against network loops on the edge of you network.
MAC (Media Access Control) Filters
Use the MAC filter to filter incoming frames based on MAC (Media Access Control) address(es) or
the OUI (Organizational Unit Identifier) that you specify. You may enable/disable the MAC filter on
specific ports. You may specify up to ten MAC addresses per port.
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Management Switch Card User's Guide