All MIBs › CM-FACILITY-MIB › cmFlowPreserveSTagProperties
cmFlowPreserveSTagProperties
Module: CM-FACILITY-MIB
OID (symbolic): CM-FACILITY-MIB::cmFlowPreserveSTagProperties
OID (numeric): 1.3.6.1.4.1.2544.1.12.4.1.4.1.42
Node type: OBJECT-TYPE
Type: TruthValue
Access: read-create
Description: This object is applicable only when Port is in connection-oriented mode. This object is applicable to evpl mode Regular flows, when S-TAG control is specified as SWAPVID. When enabled, this attribute preserves the EtherType (0x88a8) and DEI (Drop Eligibility Indicator) bit in the incoming S-TAG (both from Access and Network Port perspective) into the outgoing S-TAG. When not enabled, the incoming tag is considered as a Q-TAG (0x8100) and both EtherType and CFI (Canonical Form Indicator) bits are over-written by the S-TAG Ethertype (0x88a8) and DEI bit.
This object is not applicable for Tranparent Flow; the value should be FALSE.
What is cmFlowPreserveSTagProperties?
This read-create TruthValue, applicable only to EVPL regular flows where S-TAG control is set to SWAPVID, preserves the EtherType 0x88a8 and DEI bit from the incoming S-TAG into the outgoing S-TAG on the Ethernet Flow. It avoids losing carrier-grade tag semantics when a regular flow swaps VLAN IDs. For example, an administrator enables this so a customer's incoming 0x88a8-tagged S-TAG retains its EtherType and DEI marking even after the flow swaps it to a different VID.
OID Breakdown
Upper-level ancestors (9 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.2544 | advaMIB | ADVA-MIB |
| 1.3.6.1.4.1.2544.1 | products | ADVA-MIB |
| 1.3.6.1.4.1.2544.1.12 | fsp150cm | ADVA-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.2544.1.12.4 | cmFacilityMIB | CM-FACILITY-MIB |
| 1.3.6.1.4.1.2544.1.12.4.1 | cmFacilityObjects | CM-FACILITY-MIB |
| 1.3.6.1.4.1.2544.1.12.4.1.4 | cmFlowTable | CM-FACILITY-MIB |
| 1.3.6.1.4.1.2544.1.12.4.1.4.1 | cmFlowEntry | CM-FACILITY-MIB |
| 1.3.6.1.4.1.2544.1.12.4.1.4.1.42 | cmFlowPreserveSTagProperties | CM-FACILITY-MIB |