R2# show ip route Codes: L - local, C - connected, S - static, R - RIP, M - mobi
ID: 3778270 • Letter: R
Question
R2#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default,
O 192.168.1.0/24 [110/65] via 192.168.23.1, 00:03:44, Serial0/3/0
O 192.168.2.0/24 [110/65] via 192.168.23.1, 00:03:44, Serial0/3/0
192.168.3.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.3.0/24 is directly connected, GigabitEthernet0/0
192.168.23.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.23.0/24 is directly connected, Serial0/3/0
!
! Removal of unnecessary lines.
R2#show interface s0/3/0
Serial0/3/0 is up, line protocol is up (connected)
Hardware is HD64570
Internet address is 192.168.23.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
!
! Removal of unnecessary lines.
R2#2. Explain the steps that two routers take to become fully adjacent neighbors in OSPF.
Explanation / Answer
Answer:
When a router decides to form an adjacency with a neighboring router, it exchanges a full copy of its link state database. The neighbor, will also exchange a full copy of its link state database with the router. A±er it passes through several neighbor states, all routers be adjacent. Neighbor point-to-point links will always try to become adjacent, while routers that are attached to broadcast media like Ethernet can become adjacent only with a subset of neighboring routers on the interface
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