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（1）show ip ospf
Example:
Switch#show ip ospf
my router ID is 11.11.4.1
preference=10 ase perference=150
export metric=1
export tag=-2147483648
area ID 0
interface count: 1
80times spf has been run for this area
net range:
LSRefreshTime is1800
area ID 1
interface count: 1
41times spf has been run for this area
net range:
netid11.11.3.255 netaddress11.11.0.0 netmask255.255.252.0
LSRefreshTime is1800
Displayed information Explanation
my router ID The ID of the current layer3 switch.
preference Routing protocol priority.
ase perference Exterior routes priority for introduction.
export metric The hops for output from the port
export tag The route tag for output from the port.
area ID
interface count
imes spf has been run for this area
net range
OSPF area number: including statistics for
interface number in the area, SPF algorithm
calculation time and network scope.
（2）show ip route
The “show ip route” command can be used to display the information about OSPF routes
in the route table: destination IP addresses, network masks, next hop IP addresses, and
forwarding interfaces, etc.
For example, displayed information can be:
Switch#show ip route
Total route items is 4018, the matched route items is 4018
Codes: C - connected, S - static, R - RIP derived, O - OSPF derived
A - OSPF ASE, B - BGP derived, D - DVMRP derived
Destination Mask Nexthop Interface Preference
C 4.1.140.0 255.255.255.0 0.0.0.0 Vlan2139 0