DELL N3000 User Manual

Configuring OSPF and OSPFv3

switchport mode trunk

exit

interface loopback 0

ip address 172.21.254.2 255.255.255.255

exit

exit

With no area range cost specified, the range uses auto cost:

(ABR-R0) #show ip ospf range 1

          Prefix      Subnet Mask   Type     Action       Cost   Active

      172.21.0.0      255.255.0.0      S  Advertise       Auto        Y

(ABR-R0) #show ip ospf database summary

                Network Summary States (Area 0.0.0.0)

LS Age: 644

LS options: (E-Bit)

LS Type: Network Summary LSA

LS Id: 172.21.0.0 (network prefix)

Advertising Router: 10.10.10.10

LS Seq Number: 0x80000002

Checksum: 0x8ee1

Length: 28

 Network Mask: 255.255.0.0

 Metric: 2

Min—The cost can be set to 0, the minimum value. OSPF re-advertises the 

summary LSA with a metric of 0:

(ABR-R0) (config-router)#area 1 range 172.21.0.0 255.255.0.0 summarylink advertise cost ?

<0-16777215>             Set area range cost

(ABR-R0) (config-router)#area 1 range 172.21.0.0 255.255.0.0 summarylink 

advertise cost 0

(ABR-R0) #show ip ospf range 1

          Prefix      Subnet Mask   Type     Action       Cost   Active

      172.21.0.0      255.255.0.0      S  Advertise          0        Y

(ABR-R0) #show ip ospf 0 database summary

                Network Summary States (Area 0.0.0.0)