cisco ccna 200

cisco ccna 200

Extended intermediate system reachability TLV (type 22 ) Hostname: R1 Router ID: One is a Point-to-Point IS to IS hello PDU . 4 10.1.45.5 8 msec 8 msec * R3 found that the inbound tag 300 's tag package, the outbound tag is a POP , so he pops the top tag (actually a layer), and then directly throws the popped data to 10.1.34.4 , note that this time it does not need Find the FIB table again because there is already a next hop in the LFIB table. Eventually this data was passed to R4 . Level2 : Backbone , a collection of consecutive L2 routers (including L1/L2 router ); Backbone is made up of all L2s (including L1/L2) BGP routing problem, well,cisco ccna 200, now we use the loopback interface on R1 and R4 to establish IBGP adjacency, the problem is solved. At this time R4 , the go 5.5.5.5 next hop of the R1 of Loopback port addresses, R4 at destined to 5.5.5.5 of the IP when the pressure package label, use is 1.1.1.1/32 routing tag, The same is true for R3 and R2 , then the label package can be opened through 1.1.1.1/32 . Switched HELLO PDU (ESH , ISH and IIH) Tunnel priority Local binding: tag: imp-null *Aug 18 04:37:06.239: 10.1.34.4 [MPLS: Labels 404/505 Exp 0] 0 ​​msec 0 msec 0 msec Interface loopback0 Delay metric Network 10.1.45.5 0.0.0.0 area 0 !!! LDP neighbor discovery *Aug 18 09:06:02.699: TIME_VALUES type 1 length 8 : Extended OSPF and IS-IS to TE required information flooding in the network, then Tunnel head-end router can build your own TE This NSAP address is still a bit longer, and it is inconvenient to use. The SystemID is mainly used to identify several attributes, such as adjacency information, LSP identifier in IS-IS database, etc. In most cases, We are more suitable for symbols that have literal meanings, such as R1 and R2 , rather than a string of numbers. So CISCO IOS provides us with a very good way: the mapping of the router hostname to the NSAP address. Essentially the mapping of hostname to SystemID . There are two methods of static mapping and dynamic mapping.