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| app-notes:supervision [2015/04/05 14:24] – hess | app-notes:supervision [2015/04/20 09:43] (current) – [Introduction] fachet | ||
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| ===== Introduction ===== | ===== Introduction ===== | ||
| {{: | {{: | ||
| - | This note descibes | + | This note describes |
| functionality. | functionality. | ||
| Line 11: | Line 11: | ||
| Wireless LAN (WLAN), Ethernet or PPP over Ethernet (PPPoE) connections. | Wireless LAN (WLAN), Ethernet or PPP over Ethernet (PPPoE) connections. | ||
| - | The highes | + | The highest |
| - | link as well generic for any link based on the routing table. The user can define up to two host which are pinged | + | link as well generic for any WWAN link. The user can define up to two host which are pinged |
| - | every "ping interval" | + | every "ping interval" |
| milliseconds a retry is done using the "retry interval" | milliseconds a retry is done using the "retry interval" | ||
| If still there is no answer the defined emergency action is executed. It's recommended to set " | If still there is no answer the defined emergency action is executed. It's recommended to set " | ||
| Line 20: | Line 20: | ||
| Emergency action " | Emergency action " | ||
| If you are using a VPN you should also enable the dead pear detection or keep alive mechanisms. | If you are using a VPN you should also enable the dead pear detection or keep alive mechanisms. | ||
| - | For the generic link " | + | " |
| - | This ping will ensure that even interruptions in the back-bone can be detected and a full point-to-point connection | + | |
| - | is guaranteed. | + | |
| The** WWAN Manager** who is responsible for the control of the mobile network modems checks every 15 seconds | The** WWAN Manager** who is responsible for the control of the mobile network modems checks every 15 seconds | ||
| - | if the connection is still established. Different informations like configurable signal | + | if the connection is still established. Different informations like configurable signal |
| network registration status of service type are used to determine the status of the modem links. | network registration status of service type are used to determine the status of the modem links. | ||
| Line 50: | Line 48: | ||
| Finaly a **Hardware Watchdog** is available which will restart the device if he is not retriggered after x seconds. | Finaly a **Hardware Watchdog** is available which will restart the device if he is not retriggered after x seconds. | ||
| The Router Suppervision deamon checks permanently if all components of the router application are still alive. | The Router Suppervision deamon checks permanently if all components of the router application are still alive. | ||
| - | So in the unlinkely | + | So in the unlikely |
| completely by rebooting. This is the only condition where the system will reboot except " | completely by rebooting. This is the only condition where the system will reboot except " | ||
| is configured in the link supervision. | is configured in the link supervision. | ||
| ===== Summary ===== | ===== Summary ===== | ||
| - | - Level 5: Application level Ping Supervision | ||
| - | * Is my application server reachable? | ||
| - Level 4: VPN dead peer detection/ | - Level 4: VPN dead peer detection/ | ||
| - | * Is VPN link over WAN link healthy? | + | * Is VPN link over WAN link healthy? |
| - Level 3: Link level Ping Supervision | - Level 3: Link level Ping Supervision | ||
| * Is link to next network node healthy? | * Is link to next network node healthy? | ||