Alcatel-Lucent 7750 SR OS Service Manual page 483

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 within
a VPLS spoke service distribution point (SDP). 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)
7750 SR OS Services Guide
Virtual Private LAN Services
edge-port on page
Page 483
483).