stpPortOptfRootLoopGuard
NMS-STP ·
.1.3.6.1.4.1.3320.9.253.7.1.5
Object
column
r/w
Enumeration
Root Guard prevents a port that is receiving superior BPDUs from becoming root port.
In SSTP and PVST modes, if a Root Guard-enabled port is receiving superior BPDUs, it is always blocked.
In RSTP and MSTP modes, if a Root Guard-enabled port originally didn't receive superior BPDUs, but now
it is receiving superior BPUDs, it is blocked.
Loop guard prevents alternate and root ports from becoming designated ports.
In SSTP and PVST modes, if a Loop guard-enabled port is designated port, it is always blocked.
In RSTP and MSTP modes, if a Loop guard-enabled port becomes designated port because of a failure
that can't receive BPDUs, it is blocked.
Context
- MIB
- NMS-STP
- OID
.1.3.6.1.4.1.3320.9.253.7.1.5- Type
- column
- Access
- readwrite
- Status
- current
- Parent
- stpPortOptfTableEntry
- Table
- stpPortOptfTable
- Siblings
- 4
Syntax
Enumeration
Values & Constraints
Enumerated Values
0 | no |
1 | rootGuard |
2 | loopGuard |
3 | disabled |
Related Objects
Sibling Objects
| Object | Type | Syntax | OID |
|---|---|---|---|
| stpPortOptfPortFast Port Fast immediately brings a port to the forwarding state from a blocking state, bypassing the listening and learning states. | column | Enumeration | .1.3.6.1.4.1.3320.9.253.7.1.1 |
| stpPortOptfBpduGuard BPDU guard can operate in all spanning tree modes, but the feature operates with some differences.
In SSTP and PVST modes, if a Port Fast-enabled port receives a BPDU,it will be … | column | Enumeration | .1.3.6.1.4.1.3320.9.253.7.1.2 |
| stpPortOptfBpduFilter This featue prevents ports from sending BPDUs. If a BPDU is received on a Port Fast-enabled port,
the port loses its Port Fast-operational status,and BPDU filtering is disabled. | column | Enumeration | .1.3.6.1.4.1.3320.9.253.7.1.3 |
| stpPortOptfLoopFast This feature is used to minimize the convergence time in RSTP mode. | column | Enumeration | .1.3.6.1.4.1.3320.9.253.7.1.4 |