Alcatel-Lucent 7210 SAS M Service Manual page 327

Table 16: SAP BPDU Encapsulation States (Continued)
TLV: VLAN
Padding
Each SAP has a Read-Only operational state that shows which BPDU encapsulation is currently
active on the SAP. The states are:
•
•
Dot1d is the initial and only SAP BPDU encapsulation state for SAPs defined on Ethernet
interface with encapsulation type set to null.
7210 SAS M Services Guide
N/A N/A
As Required As Required
Dot1d — This state specifies that the switch is currently sending IEEE 802.1d standard
BPDUs. The BPDUs are tagged or non-tagged based on the encapsulation type of the
egress interface and the encapsulation value defined in the SAP. A SAP defined on an
interface with encapsulation type Dot1q continues in the dot1d BPDU encapsulation state
until a PVST encapsulated BPDU is received In which case, the SAP will convert to the
PVST encapsulation state. Each received BPDU must be properly IEEE 802.1q tagged if
the interface encapsulation type is defined as Dot1q. PVST BPDUs will be silently
discarded if received when the SAP is on an interface defined with encapsulation type
null.
PVST — This state specifies that the switch is currently sending proprietary encapsulated
BPDUs. PVST BPDUs are only supported on Ethernet interfaces with the encapsulation
type set to dot1q. The SAP continues in the PVST BPDU encapsulation state until a dot1d
encapsulated BPDU is received, in which case, the SAP reverts to the dot1d encapsulation
state. Each received BPDU must be properly IEEE 802.1q tagged with the encapsulation
value defined for the SAP. PVST BPDUs are silently discarded if received when the SAP
is on an interface defined with a null encapsulation type.
Virtual Private LAN Services
N/A VPLS SAP encap value
N/A As Required
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