OSPF

[cloudymanyande]

two ospf proccesses in different areas 0 and 10 in a single cisco failing to failover as primary and secondary links

[Joseph W. Doherty]

For a primary and secondary, it's somewhat unusual for those links to be in different OSPF areas, possibly even more unusual to be using multiple OSPF processes (especially w/o VRFs).  Could you provide more information?

[cloudymanyande]

I did this

router ospf 36
passive-interface Vlan10
network 10.10.16.0 0.0.0.3 area 0
network 192.168.180.0 0.0.0.255 area 0

router ospf 30
network 10.10.16.0 0.0.0.3 area 20
network 192.168.180.0 0.0.0.255 area 20

ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/1 10.10.17.0 name MPLS
ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/0.2028 10.10.16.1 112 name ISP2

how best should i configure this for failover to work.

[MHM Cisco World]

these are two edge router and each one connect to two different ISP ?

[MHM Cisco World]

thanks 
but the config you share for which core SW or branch edge router or HQ edge router?

[Joseph W. Doherty]

The router accepts that configuration?!!!

Thinking some about it, but not (yet?) trying to do similar, I can see how router could accept it.

This is the branch side?

How is HQ OSPF configured?

Why are doing this?  (I'm wondering if you misunderstand OSPF router processes vis-à-vis OSPF areas.)

[MHM Cisco World]

two process meaning any prefix from one process will be learn as External for other process.
so you need 
redistribute one process to other 
also if you have LO you must add it to one process and other process will learn prefix of this LO from redistribute, you can can not config one link or one LO with two ospf process   

[Joseph W. Doherty]

More or less what I've been thinking, from OP's description.  I.e., if explicit redistribution NOT being done, route table can show destination network from combined OSPF topologies but it can be lost with loss of one of the links.

[MHM Cisco World]

explicit redistribution for which prefix, sorry can you more elaborate ?

[Joseph W. Doherty]

Multiple OSPF processes follow the same "rules" as would different routing protocols, e.g. OSPF and EIGRP.  I.e., there's no automatic prefix sharing; you need to explicitly redistribute (and you can, of course, be selective in what prefixes you redistribute).

[MHM Cisco World]

from my view 
he have 
R1-R2
|

R3

he run ospf process 1 between R1-R2 
and run ospf process 2 between R2-R3 

if he receive same prefix from both R2 and R3 
Am I right ?

[Joseph W. Doherty]

Unsure I understand your question?

If you mean R3 sends a prefix to R2, does R1 get it from R2?  By default, the answer is it does not.

[paul driver]

Hello
If you have two active ospf router processes on a single router then you have two separate ospf domains

[cloudymanyande]

how best should i configure it.