Alcatel-Lucent 7750 SR Manual page 662

Virtual Private LAN Services
VPLS STP Commands
stp
Syntax stp
Context config>service>vpls
config>service>vpls>sap
config>service>vpls>spoke-sdp
Description
This command enables the context to configure the Spanning Tree Protocol (STP) parameters.
Alcatel-Lucent's STP is simply the Spanning Tree Protocol (STP) with a few modifications to better
suit the operational characteristics of VPLS services. The most evident change is to the root bridge
election. Since the core network operating between Alcatel-Lucent's service routers should not be
blocked, the root path is calculated from the core perspective.
auto-edge
Syntax auto-edge
no auto-edge
Context config>service>vpls>sap>stp
config>service>vpls>spoke-sdp>stp
Description This command configures automatic detection of the edge port characteristics of the SAP or spoke
SDP.
If auto-edge is enabled, and STP concludes there is no bridge behind the spoke SDP, the
OPER_EDGE variable will dynamically be set to true. If auto-edge is enabled, and a BPDU is
received, the OPER_EDGE variable will dynamically be set to true (see
The no form of this command returns the auto-detection setting to the default value.
Default
auto-edge
edge-port
Syntax [no] edge-port
Context config>service>vpls>sap>stp
config>service>vpls>spoke-sdp>stp
Description
This command configures the SAP or SDP as an edge or non-edge port. If auto-edge is enabled for
the SAP, this value will be used only as the initial value.
NOTE: The function of the edge-port command is similar to the rapid-start command. It tells RSTP
that it is on the edge of the network (for example, there are no other bridges connected to that port)
Page 662
edge-port on page
7750 SR OS Services Guide
662).