cisco ccna 1 introduction to networks pdf

cisco ccna 1 introduction to networks pdf.interface oRouter# show ip ospf interface Ethernet 1 is up, line protocol is up Internet Address 172.16.255.1/24, Area 0 Process ID 100, Router ID 172.16.255.1, Network Type BROADCAST, Cost: 10 Transmit Delay is 1 sec, State DROTHER, Priority 1Designated Router id 172.16.255.11, Interface address 172.16.255.11 Backup Designated router id 172.16.255.10z Interface addr 172.16.255.10 Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 0:00:03 Neighbor Count is 3, Adjacent neighbor count is 2Adjacent with neighbor 172.16.255.10 (Backup Designated Router) Adjacent with neighbor 172.16.255.11 (Designated Router)The command show ip ospf interface displays the ID of the current router, the IDs of the DR and BDR, the Hello timer (10 seconds), the expiration timer (40 seconds), the number of neighbors, and the number of adjacencies. Don't forget that for two OSPF routers to be neighbors, their Hello timers and Expiration timers must be the same -In this example, the current router has a router ID of 172.16.255.1 and a status of DROTHER, which means it is not a DR, nor a BDR o In fact, the DR is 172.16.255.11, and the BDR is 172.16.255.10 (these are the router IDs of the DR and the BDR) o Also, notice that the Hello timer and expiration timer are both default values, 10 seconds and 40 seconds respectively. There are a total of 3 neighbors, and two adjacencies: don't forget that the router only establishes adjacencies with the DR and BDR, and not with all routers in the segment.Video 19.08 A multimedia demonstration of using the command show ip ospf interface on an OSPF router is included in the companion digital resource to this book.You can use the command show ip ospf neighboro To view all of a router's OSPF neighbors,Router# show ip ospf neighbor ID Pri State Dead Time Address Interface 172.16.255.11 1 FULL/DR 0:00:31 172.16.255.11 EthernetO 172.16.255.10 1 FULL/ BDR 0:00:33 172.16.255.10 EthernetO 172.16.255.9 1 2WAY/DROTHER 0:00:35 172.16.255.9 EthernetO 172.16.254.2 1 FULL/DR 0:00:39 172.16.254.2 SerialO.l19.4.6 Command showip ospfneighbor