R1#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
R1(config)#router ospf 1
R1(config-router)#compatible ?
  rfc1583  compatible with RFC 1583
  rfc1587  compatible with RFC 1587
  rfc5243  supports DBD exchange optimization

R1(config-router)#compatible 
% Incomplete command.

R1(config-router)#end
R1#end
% Bad IP address or host name% Unknown command or computer name, or unable to find computer address
R1#show ip ospf
 Routing Process "ospf 1" with ID 1.1.1.1
 Start time: 00:04:37.113, Time elapsed: 00:05:05.270
 Supports only single TOS(TOS0) routes
 Supports opaque LSA
 Supports Link-local Signaling (LLS)
 Supports area transit capability
 Supports NSSA (compatible with RFC 3101)
 Supports Database Exchange Summary List Optimization (RFC 5243)
 Maximum number of non self-generated LSA allowed 50000
    Current number of non self-generated LSA 12
    Threshold for warning message 75%
    Ignore-time 5 minutes, reset-time 10 minutes
    Ignore-count allowed 5, current ignore-count 0
 Event-log enabled, Maximum number of events: 1000, Mode: cyclic
 It is an area border router
 Router is not originating router-LSAs with maximum metric
 Initial SPF schedule delay 50 msecs
 Minimum hold time between two consecutive SPFs 200 msecs
 Maximum wait time between two consecutive SPFs 5000 msecs
 Incremental-SPF disabled
 Per-prefix-distribution disabled
 Initial LSA throttle delay 50 msecs
 Minimum hold time for LSA throttle 200 msecs
 Maximum wait time for LSA throttle 5000 msecs
 Minimum LSA arrival 100 msecs
 LSA group pacing timer 240 secs
 Interface flood pacing timer 33 msecs
 Retransmission pacing timer 66 msecs
 EXCHANGE/LOADING adjacency limit: initial 300, process maximum 300
 Number of external LSA 0. Checksum Sum 0x000000
 Number of opaque AS LSA 0. Checksum Sum 0x000000
 Number of DCbitless external and opaque AS LSA 0
 Number of DoNotAge external and opaque AS LSA 0
 Number of areas in this router is 2. 2 normal 0 stub 0 nssa
 Number of areas transit capable is 0
 External flood list length 0
 IETF NSF helper support enabled
 Cisco NSF helper support enabled
 Reference bandwidth unit is 100 mbps
    Area BACKBONE(0)
        Number of interfaces in this area is 2 (1 loopback)
	Area has no authentication
	SPF algorithm last executed 00:04:39.776 ago
	SPF algorithm executed 5 times
	Area ranges are
	Number of LSA 9. Checksum Sum 0x0407F7
	Number of opaque link LSA 0. Checksum Sum 0x000000
	Number of DCbitless LSA 0
	Number of indication LSA 0
	Number of DoNotAge LSA 0
	Flood list length 0
    Area 1
        Number of interfaces in this area is 1
	Area has no authentication
	SPF algorithm last executed 00:04:39.781 ago
	SPF algorithm executed 4 times
	Area ranges are
	Number of LSA 13. Checksum Sum 0x06E5A3
	Number of opaque link LSA 0. Checksum Sum 0x000000
	Number of DCbitless LSA 0
	Number of indication LSA 0
	Number of DoNotAge LSA 0
	Flood list length 0