Could Nokia block BPDU packet on sap in VPLS service?

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plawansai
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Joined: 28 Nov 2017 04:30

Could Nokia block BPDU packet on sap in VPLS service?

Post by plawansai » 13 Jun 2018 05:41

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Slaven
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Joined: 15 Jun 2018 06:55

Re: Could Nokia block BPDU packet on sap in VPLS service?

Post by Slaven » 15 Jun 2018 07:00

Please find the following info about way STP/BPDU is handled by SAR on a SAP:

SAP STP Administrative State
The administrative state of STP within a SAP controls how BPDUs are transmitted
and handled when received. The allowable states are:
SAP Admin Up
The default administrative state is up for STP on a SAP. BPDUs are handled in
the normal STP manner on a SAP that is administratively up.
SAP Admin Down
An administratively down state allows a service provider to prevent a SAP from
becoming operationally blocked. BPDUs will not originate out the SAP towards
the customer.
If STP is enabled on the VPLS level, but disabled on the SAP, received BPDUs
are discarded
. Discarding the incoming BPDUs allows STP to continue to
operate normally within the VPLS service while ignoring the down SAP. The
specified SAP will always be in an operationally forwarding state.

Note: The administratively down state allows a loop to form within the VPLS.

CLI Syntax: config>service>vpls>sap>stp#
[no] shutdown
Range: shutdown or no shutdown
Default: no shutdown (SAP admin up)

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