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Update howto-network-fabric-quality-of-service.md #4340

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66 changes: 51 additions & 15 deletions operator-nexus/howto-network-fabric-quality-of-service.md
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Expand Up @@ -16,36 +16,72 @@ Users can enable or disable QoS via Azure CLI.
## Prerequisites

- Use supported API and Fabric version.
- Fabric must be in a state that allows updates (not in an immutable provisioning phase).


## Option 1—Azure CLI
- Fabric must be in a state that allows updates (not in an immutable provisioning phase).
- States that allow fabric update:

#### Network Fabric Update (PATCH) — Allowed & Blocked States

##### Configuration State

| Allowed ✅ | Blocked ❌ |
|-----------|-----------|
| Succeeded | Provisioning |
| Provisioned | Deprovisioning |
| Deprovisioned | Rejected |
| ErrorProvisioning | DeferredControl |
| ErrorDeprovisioning | PendingCommit |
| Accepted | PendingAdministrativeUpdate |
| Failed | CommitStaged |
| | CommitStageFailed |
| | CommitRollbackFailed |
| | Initializing |

##### Lock States

| Lock Type | Allowed ✅ | Blocked ❌ |
|-----------|-----------|-----------|
| Administrative Lock | Disabled | Enabled |
| Configuration Lock (Commit Lock) | Disabled | Enabled |

##### Under Maintenance — Exempted Reasons (PATCH still allowed)

| Reason |
|--------|
| NniUpdateInProgress |
| ControlPlaneAclsUpdated |
| TrustedIpPrefixesUpdated |

Any other `UnderMaintenance` reason → ❌ PATCH blocked

### Enable (or disable) QoS on a fabric:
```Azure CLI
az networkfabric fabric update \
--subscription XXX_SUBSCRIPTION_ID \
--resource-group XXX_RESOURCE_GROUP \
--resource-name XXX_FABRIC_NAME \
az networkfabric fabric update \
--subscription XXX_SUBSCRIPTION_ID \
--resource-group XXX_RESOURCE_GROUP \
--resource-name XXX_FABRIC_NAME \
--qos-configuration "{qosConfigurationState:'Enabled'}"
```
Use 'Disabled' to turn QoS off

### Enable configuration lock:
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```Azure CLI
az networkfabric fabric configuration-lock enable \
--subscription XXX_SUBSCRIPTION_ID \
--resource-group XXX_RESOURCE_GROUP \
--resource-name XXX_FABRIC_NAME
az networkfabric fabric lock-fabric \
--subscription XXX_SUBSCRIPTION_ID \
--resource-group XXX_RESOURCE_GROUP \
--network-fabric-name XXX_FABRIC_NAME \
--lock-type Configuration \
--action Lock
```
### Commit configuration:
```Azure CLI
az networkfabric fabric commit \
--subscription XXX_SUBSCRIPTION_ID \
--resource-group XXX_RESOURCE_GROUP \
az networkfabric fabric commit-configuration \
--subscription XXX_SUBSCRIPTION_ID \
--resource-group XXX_RESOURCE_GROUP \
--resource-name XXX_FABRIC_NAME
```

Note: The commit-configuration will remove the Configuration lock on Fabric

## Feature behavior & traffic classification

- Each packet is classified into a Traffic Class (TC); egress queues prevent low‑priority traffic from blocking high‑priority traffic.
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