OSPF NX-OS & IOS CLI

Cisco IOS CLI	Cisco NX-OS CLI
Enabling the OSPF Feature

Cisco IOS Software does not have the ability to enable or disable OSPF.	feature ospf

Configuring an OSPF Instance and Router ID

router ospf 10 router-id 192.168.1.1	router ospf 10 router-id 192.168.1.1

Associating a Network with an OSPF Instance and Area

router ospf 10 network 192.168.1.0 0.0.0.255 area 1	interface Ethernet2/1 ip address 192.168.10.1/24 ip router ospf 10 area 1

Configuring a Passive Interface

router ospf 10 passive-interface GigabitEthernet2/1 network 192.168.1.0 0.0.0.255 area 1	interface Ethernet2/1 ip address 192.168.11.1/24 ip ospf passive-interface ip router ospf 10 area 0

Configuring Interface Authentication (MD5)

interface GigabitEthernet2/1 ip address 192.168.10.1 255.255.255.0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco123	interface Ethernet2/1 ip address 192.168.10.1/24 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 3 a667d47acc18ea6b ip router ospf 10 area 1

Configuring a Stub Area with the no summary Option

router ospf 10 area 2 stub no-summary	router ospf 10 area 2 stub no-summary

Creating a Not-So-Stubby Area (NSSA) and Generating a Default Route

router ospf 10 area 3 nssa default-information-originate	router ospf 10 area 3 nssa default-information-originate

Configuring Inter-Area and External Summarization

router ospf 10 area 0 range 159.142.0.0 255.255.0.0 summary-address 172.16.0.0 255.255.0.0	router ospf 10 area 0 range 159.142.0.0/16 summary-address 172.16.0.0/16

Generating a Default Route (Conditional)

router ospf 10 default-information originate	router ospf 10 default-information originate

Generating a Maximum Metric (Max-Metric) Value

router ospf 10 max-metric router-lsa	router ospf 10 max-metric router-lsa

Configuring Route Redistribution (Permit all Static Routes)

router ospf 10 redistribute static subnets	router ospf 10 redistribute static route-map static-to-ospf route-map static-to-ospf permit 10

Configuring a VRF Instance for OSPF Routing

router ospf 10 vrf customer-a	router ospf 10 vrf customer-a

Verification Command Comparison

The following table compares some useful show commands for verifying and troubleshooting an OSPFv2 network configuration.

Cisco NX-OS OSPFv2	Cisco IOS Software OSPFv2	Command Description
show ip ospf	show ip ospf	Displays information for all OSPF instances
show ip ospf <instance>	show ip ospf <#>	Displays information for a specific OSPF instance
show ip ospf border-routers	show ip ospf border-routers	Displays a list of border routers
show ip ospf database	show ip ospf database	Displays OSPF database information
show ip ospf interface	show ip ospf interface	Displays all OSPF enabled interfaces and associated status information
show ip ospf interface brief	show ip ospf interface brief	Displays a brief list and status of OSPF enabled interfaces
show ip ospf interface detail	-	Displays additional packet statistics for each interface
show ip ospf lsa-content-changed-list	-	Displays the LSA's that changed content
show ip ospf memory	-	Displays the memory allocated for OSPF
show ip ospf neighbors	show ip ospf neighbor	Displays neighbor-specific information
show ip ospf neighbors detail	show ip ospf neighbor detail	Displays details for each OSPF neighbor
show ip ospf neighbors summary	-	Displays summary information and packet statistics for each OSPF neighbor
show ip ospf policy statistics	-	Displays redistribution statistics for a specified protocol
show ip ospf request-list	show ip ospf request-list	Displays a list of link-state advertisements (LSAs) that have been requested
show ip ospf retransmission-list	show ip ospf retransmission-list	Displays a list of the link-state retransmission list
show ip ospf route	-	Displays all routes learned through OSPF
show ip ospf statistics	show ip ospf statistics	Displays OSPF LSA statistics
show ip ospf summary-address	show ip ospf summary-address	Displays OSPF summarized networks
show ip ospf traffic	show ip ospf traffic	Displays OSPF related packet counters
show ip ospf virtual-links	show ip ospf virtual-links	Displays OSPF virtual links
show ip ospf vrf	-	Displays information for a specified OSPF VRF instance