# 網路管理筆記
###### tags: `network` `operations`

## 國際電路 故障維修
- 檢查 interface
- 告知中華電信
- 確認 Tx Rx 光強度
- show optic [Slot Number]
- 都沒問題後 確認 interface up link up

## SNMP 計算

- RX utilization
$utilization_{Rx}=\frac{\Delta iflnOctets} {ifSpeed \times \Delta sysUpTime}$
- Tx utilization
$utilization_{Tx}=\frac{\Delta ifOtOctets} {ifSpeed \times \Delta sysUpTime}$
- rate of receive package drop
$Packet Drop_{Rx}=\frac{\Delta ifInDiscards}{\Delta sysUpTime}$
- rate of transmit package drop
$Packet Drop_{Tx}=\frac{\Delta ifOutDiscards}{\Delta sysUpTime}$
- rate of receive package error
$Packet Error_{Rx}=\frac{\Delta ifInErrors}{\Delta sysUpTime}$
- rate of transmit package error
$Packet Error_{Tx}=\frac{\Delta ifOutErrors}{\Delta sysUpTime}$
- rate of receive Broadcast
$B_{Rx}=\frac{\Delta ifHCInBroadcastPkts}{\Delta sysUpTime}$
- rate of transmit Broadcast
$B_{Tx}=\frac{\Delta ifHCOutBroadcastPkts}{\Delta sysUpTime}$

- Discards of receive
$D_{Rx}=\frac{\Delta ifInDiscards}{\Delta sysUpTime}$
- Discards of transmit
$D_{Tx}=\frac{\Delta ifOutDiscards}{\Delta sysUpTime}$

- 參考來源：http://thuir.thu.edu.tw/retrieve/7615/092THU00392007-001.pdf

## SNMP OID 資訊
- juniper [http://mibs.observium.org/mib/JUNIPER-DOM-MIB/](http://mibs.observium.org/mib/JUNIPER-DOM-MIB/)
- 1.3.6.1.4.1.2636
- MLXe4 [http://oid-info.com/get/1.3.6.1.4.1.1991.1.1.3.3.6.1](http://oid-info.com/get/1.3.6.1.4.1.1991.1.1.3.3.6.1)
- 1.3.6.1.4.1.1991
- N7K
- SNMP Polling of optical budget
- URL : [https://community.cisco.com/t5/xr-os-and-platforms/snmp-polling-of-optical-budget-dbm/td-p/2735006](https://community.cisco.com/t5/xr-os-and-platforms/snmp-polling-of-optical-budget-dbm/td-p/2735006)
- 取得 sencer ID : 1.3.6.1.2.1.47.1.1.1.1.7
- 取得 sencer 值 ： [https://oidref.com/1.3.6.1.4.1.9.9.91.1.1.1.1.7](https://oidref.com/1.3.6.1.4.1.9.9.91.1.1.1.1.7)
## 網路設備操作 以及 SNMP
### juniper (QFX 10002)
- 查詢 interface 光訊號相關資訊

show interfaces diagnostics optics [Interface name / ifName]

| oid | object name | name on router | unit |
| ----------------------------------- | ---------------------------------- | ------------------------ | --------- |
| 1.3.6.1.4.1.2636.3.60.1.2.1.1.1 | jnxDomLaneIndex | Lane | |
| 1.3.6.1.4.1.2636.3.60.1.2.1.1.6 | jnxDomCurrentLaneRxLaserPower | Laser receiver power | dBm |
| 1.3.6.1.4.1.2636.3.60.1.2.1.1.7 | jnxDomCurrentLaneTxLaserBiasCurrent| Laser bias current | mA |
| 1.3.6.1.4.1.2636.3.60.1.2.1.1.8 | jnxDomCurrentLaneTxLaserOutputPower| Laser output power | dBm |
| 1.3.6.1.4.1.2636.3.60.1.2.1.1.9 | jnxDomCurrentLaneLaserTemperature | Module temperature | degrees c |

### MLXe4
- 查詢 interface 光訊號相關資訊

show optic [Slot Number]

| oid | object name | name on router | unit |
| -------------------------------- | ---------------------------------- | ------------------------ | --------- |
| 1.3.6.1.4.1.1991.1.1.3.3.6.1.3 | snIfOpticalMonitoringRxPower | Rx power | dBm |
| 1.3.6.1.4.1.1991.1.1.3.3.6.1.4 | snIfOpticalMonitoringTxBiasCurrent | Tx Bias Current | mA |
| 1.3.6.1.4.1.1991.1.1.3.3.6.1.2 | snIfOpticalMonitoringTxPower | Tx power | dBm |
| 1.3.6.1.4.1.1991.1.1.3.3.6.1.1 | snIfOpticalMonitoringTemperature | Temperature | degrees c |

### N7K
- 查詢 interface 光訊號相關資訊

show interface ethernet [Slot Number/Port Number] transceiver details

| oid | object name | name on router | unit |
| ------------------------------ | --------------- | ------------------------ | --------- |
| 1.3.6.1.4.1.9.9.91.1.1.1.1.4 | entSensorValue | Rx power | dBm |
| 1.3.6.1.4.1.9.9.91.1.1.1.1.4 | entSensorValue | Tx Bias Current | mA |
| 1.3.6.1.4.1.9.9.91.1.1.1.1.4 | entSensorValue | Tx power | dBm |
| 1.3.6.1.4.1.9.9.91.1.1.1.1.4 | entSensorValue | Temperature | degrees c |
- 注意：
- 在 N7K 上，interface 的測量值 (溫度，電流，光訊號(Rx Tx)) 都對應到一個 sensor ID，必須要先取得 interface sensor ID 之後，再跟 entSensorValue 去比對所得到的資料，是屬於那一個值