Alcatel-Lucent 7750 SR Manual page 664

Virtual Private LAN Services
Description This command configures the Spanning Tree Protocol (STP) hello time for the Virtual Private LAN
Service (VPLS) STP instance.
The hello time parameter defines the default timer value that controls the sending interval between
BPDU configuration messages by this bridge, on ports where this bridge assumes the designated role.
The active hello time for the spanning tree is determined by the root bridge (except when the STP is
running in RSTP mode, then the hello time is always taken from the locally configured parameter).
The configured hello-time can also be used to calculate the forward delay. See
The no form of this command returns the hello time to the default value.
Default
2 seconds
Parameters hello-time — The hello time for the STP instance in seconds.
hold-count
Syntax hold-count BDPU tx hold count
no hold-count
Context config>service>vpls>stp
Description
This command configures the peak number of BPDUs that can be transmitted in a period of one
second.
The no form of this command returns the hold count to the default value
Default 6
Parameters
BDPU tx hold count — The hold count for the STP instance in seconds.
link-type
Syntax link-type {pt-pt | shared}
no link-type
Context config>service>vpls>sap>stp
config>service>vpls>spoke-sdp>stp
Description
This command instructs STP on the maximum number of bridges behind this SAP or spoke SDP. If
there is only a single bridge, transitioning to forwarding state will be based on handshaking (fast
transitions). If more than two bridges are connected via a shared media, their SAP or spoke SDPs
should all be configured as shared, and timer-based transitions are used.
The no form of this command returns the link type to the default value.
Default
pt-pt
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Values
1 — 10
Values 1 — 10
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7750 SR OS Services Guide
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