Re: OSPF- Area dummy area message

Did any one receive this message?

On Mon, Nov 26, 2012 at 5:09 PM, Rajesh Prasad
<prasadrajesh1979_at_gmail.com>wrote:

> Hi,
>
> I am having a strange OSPF behavior, may be this is the way to prevent
> loop in OSPF.
>
> This is the lab scenario.
>
> R5 is acting as a Hub and it is connected to R2 and R4 via
> point-to-multipoint link and to R1 via point-to-point link. R1 and R2 are
> connected to R6 via EIGRP and redistributing EIGRP routes into R1 and R2.
>
> Now, as per my understanding on R1 and R2 the external LSA must be present
> in database both on R1 (must be from R2 and its own) and on R2 ( From R1
> and it own.)
> But on both routers the database showing their own external LSA and does
> not showing external LSA from others.
>
> After doing the debugging, i found that the routes are removed from the
> database due to OSPF set the routes to Area dummy area and increased the
> metric to 167772 learned from other borders routers
>
> Debuggin done on R1
>
> These routes are from R1
>
> OSPF process partial spfQ LSA id 54.1.3.0: mask 255.255.255.0, type 5
> adv_rtr 150.1.1.1, age 3600, seq 0x80000002 (Area dummy area)
> OSPF: Start partial processing Type 5 External LSA 54.1.3.0, mask
> 255.255.255.0, adv 150.1.1.1, age 3600, seq 0x80000002, metric 167772
>
> Rack1R2#show ip ospf database external 204.12.1.0
>
> OSPF Router with ID (150.1.2.2) (Process ID 1)
>
> Type-5 AS External Link States
>
> LS age: 968
> Options: (No TOS-capability, DC)
> LS Type: AS External Link
> Link State ID: 204.12.1.0 (External Network Number )
> Advertising Router: 150.1.2.2
> LS Seq Number: 80000009
> Checksum: 0x1165
> Length: 36
> Network Mask: /24
> Metric Type: 1 (Comparable directly to link state metric)
> TOS: 0
> Metric: 20
> Forward Address: 0.0.0.0
> External Route Tag: 300
>
>
> Thanks in advance.
>
> Rgds,
>
> Rajesh

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Received on Tue Nov 27 2012 - 11:29:58 ART