About the summarization of ABR router and router summurization(OSPF)

[yo8-20]

Dears, 

OSPF diagram show as below

R1 (Area 12 ) ---- R2( Area 0) ---- R3 (Area 0)---- R4(Area 10)

if only R1 loopback 0 interface  advertised to R3  and only ABR router summurize to Area 10 , how to configure 

Best Regards,

[M02@rt37]

Hello @yo8-20 

Cost = Reference Bandwidth / Interface Bandwidth

Default Reference Bandwidth is 100 Mbps

Adjust the reference bandwidth as needed for high-speed networks ?

router ospf 1
auto-cost reference-bandwidth 10000

--This sets the reference bandwidth to 10000 Mbps (10 Gbps).

In some cases, you may want to manually set the cost of a link, independent of its bandwidth. This can be useful for traffic engineering purposes. Use ip ospf cost command to manually set interface cost.

interface GigabitEthernet0/0
ip ospf cost 10

--This sets the OSPF cost of the GigabitEthernet0/0 interface to 10, regardless of its actual bandwidth.

[MHM Cisco World]

close this and make new post it better

MHM