Vrf-lite and OSPF database handling

Unanswered Question
Oct 15th, 2009

Hi folks

Does someone know how ospf handles the data base with multiple vrf-lite ranges like below?

Is it possible to place both as area 0?

What's happen if it's required to maintain two area zero?

Currently is only low number of router and subnets in each area.

I believe the second version with two total different area numbers is better for both ospf processes.

But I don't find hard facts or descriptions with these circumstances.

vrf vbbb and vrf vccc are two in depend ip networks.

No MPLS or Proveiders involved.

We use C6509 and 12.2.33SXI2a

How knows more? Does someone have a link with a description?

Andy

------------------------------------------------------

! ex.1

!

ip vrf vone

rd 1:1

!

ip vrf vbbb

rd 8001:88

!

ip vrf vccc

rd 9002:99

!

!

router ospf 8001 vrf vbbb

router-id 10.10.88.111

log-adjacency-changes

capability vrf-lite

network 10.10.0.0 0.0.255.255 area 0

!

router ospf 9002 vrf vccc

router-id 10.10.99.111

log-adjacency-changes

capability vrf-lite

network 10.10.0.0 0.0.255.255 area 0

!

------------------------------------------------------

!ex2.

!

ip vrf vone

rd 1:1

!

ip vrf vbbb

rd 8001:88

!

ip vrf vccc

rd 9002:99

!

!

router ospf 8001 vrf vbbb

router-id 10.10.88.111

log-adjacency-changes

capability vrf-lite

network 10.10.0.0 0.0.255.255 area 0.80.01.88

!

router ospf 9002 vrf vccc

router-id 10.10.99.111

log-adjacency-changes

capability vrf-lite

network 10.10.0.0 0.0.255.255 area 0.90.02.99

!

------------------------------------------------------

I have this problem too.
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Edison Ortiz Thu, 10/15/2009 - 12:56

VRF will separate the RIB and each will be independent from each other.

You can have multiple VRFs and on each VRF have an area 0 without affecting the other area 0.

The requirement to have area 0 depends upon your network design and you should use the same principle as if it was just one single routing table. For instance, if you are planning to have more than one area, you need an area 0.

Regards,

Edison.

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