0.0.0/8 is variably subnetted, 2 subnets, 2 masks
O 10.2.2.2/32 [110/782] via 192.168.1.102, 00:01:17, Serial0/0/1
C 10.1.1.0/24 is directly connected, Loopback0
192.168.1.0/27 is subnetted, 1 subnets
C 192.168.1.96 is directly connected, Serial0/0/1
Example 4-11 Using ping Output to Verify Link Operation
RouterX#ppiinngg 1100..22..22..22
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/29/32 ms
160 Chapter 4: Single-Area OSPF Implementation
?– Use a loopback interface to keep the OSPF router ID consistent.
?– The show ip ospf neighbor command displays OSPF neighbor information on a per-interface
basis.
?– The commands debug ip ospf events and debug ip ospf packets can be used to troubleshoot
OSPF problems.
?– OSPF will load-balance across up to four equal-cost metric paths by default.
?– OSPF authentication can be two types: plaintext and MD5.
Troubleshooting OSPF
Because it is a link-state routing protocol, OSPF scales well with a growing network. But this
scalability introduces complexity in design, con?¬?guration, and maintenance.
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