Dell Force10 S4820T FTOS Command Reference Guide - Page 927

Parameters value level-1 level-2 This value sets the router priority. The higher the value, the higher the priority. Range: 0 to 127 Default: 64 (OPTIONAL) Specify the priority for Level 1. This is the default. (OPTIONAL) Specify the priority for Level 2. Defaults value = 64; level-1 (if not otherwise specified) Command Modes INTERFACE Command History Version 8.3.19.0 Version 8.3.12.0 Introduced on S4820T Introduced on S4810 Usage Information You can configure priorities independently for Level 1 and Level 2. Priorities determine which router on a LAN will be the designated router. Priorities are advertised within hellos. The router with the highest priority will become the designated intermediate system (DIS). Routers with a priority of 0 cannot be a designated router. Setting the priority to 0 lowers the chance of this system becoming the DIS, but does not prevent it. If all the routers have priority 0, one with highest MAC address will become DIS even though its priority is 0. is-type e Configure IS-IS operating level for a router. Syntax is-type {level-1 | level-1-2 | level-2-only} To return to the default values, enter no is-type. Parameters level-1 level-1-2 level-2-only Allows a router to act as a Level 1 router. Allows a router to act as both a Level 1 and Level 2 router. This is the default. Allows a router to act as a Level 2 router. Defaults level-1-2 Command Modes ROUTER ISIS Command History Version 8.3.19.0 Version 8.3.12.0 Introduced on S4820T Introduced on S4810 Usage Information The IS-IS protocol automatically determines area boundaries and are able to keep Level 1 and Level 2 routing separate. Poorly planned use of this feature may cause configuration errors, such as accidental area partitioning. Intermediate System to Intermediate System (IS-IS) | 927