cisco ccna exploration

cisco ccna exploration

C 1.1.1.0 is directly connected, Loopback0 Ip router isis Interface eth 0/1 IDI Initial Domain Identifier , a variable-length initial domain identifier that identifies a subdomain under AFI The configuration of R1 is as follows: Nolabel/506 Types of ! ! 120s This will directly cause R1 to select the nearest exit from R2 and R3 , and generate a default route to point to this exit. Since this experiment, the cost of R2 ,cisco ccna exploration, R3, etc. , there are two defaults in R1 's routing table. Route load balancing. This default, automatic mechanism is a benefit for the level1 area because it can reduce the routing table and provide a way to go out, but it also poses a problem, for example, if R2 or R3 is connected to the backbone . If the link DOWN is gone, will R1 still stupidly throw the packet to R2 or R3 ? Fortunately, in the new CISCO IOS , IS-IS is optimized: under normal circumstances, R2 and R3 will flood the 49.0001 area.