Alcatel-Lucent 7750 SR OS Service Manual page 405

Configuring Spoke SDP Specific STP Parameters
When a VPLS has STP enabled, each spoke SDP within the VPLS has STP enabled by default.
The operation of STP on each spoke SDP is governed by:
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Spoke SDP STP Administrative State
The administrative state of STP within a spoke SDP controls how BPDUs are transmitted and
handled when received. The allowable states are:
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CLI Syntax: config>service>vpls>spoke-sdp>stp#
Spoke SDP Virtual Port Number
The virtual port number uniquely identifies a spoke SDP within configuration BPDUs. The
internal representation of a spoke SDP is unique to a system and has a reference space much
7750 SR OS Services Guide
Spoke SDP STP Administrative State on page 405
Spoke SDP Virtual Port Number on page 405
Spoke SDP Priority on page 406
Spoke SDP Path Cost on page 407
Spoke SDP Edge Port on page 407
Spoke SDP Auto Edge on page 408
Spoke SDP Link Type on page 408
Spoke SDP Admin Up
The default administrative state is up for STP on a spoke SDP. BPDUs are handled in the
normal STP manner on a spoke SDP that is administratively up.
Spoke SDP Admin Down
An administratively down state allows a service provider to prevent a spoke SDP from
becoming operationally blocked. BPDUs will not originate out the spoke SDP towards the
customer.
If STP is enabled on VPLS level, but disabled on the spoke SDP, received BPDUs are
discarded. Discarding the incoming BPDUs allows STP to continue to operate normally
within the VPLS service while ignoring the down spoke SDP. The specified spoke SDP
will always be in an operationally forwarding state.
NOTE: The administratively down state allows a loop to form within the VPLS.
[no] shutdown
Range: shutdown
Default: no shutdown
Virtual Private LAN Services
or
no shutdown
(spoke SDP admin up)
Page 405