Routing

Dear friends, can't understand simple thing. Let's say I have 2 routers with simple conf:

R1:

set interfaces fe-0/0/0.0 family inet address 1.1.1.1/24

set interfaces lo0.0 family inet address 100.1.1.1/32

set protocols ospf area 0 interface lo0.0 passive

set protocols ospf area 1 stub interface fe-0/0/0.0

R2:

set interfaces fe-0/0/0.0 family inet address 1.1.1.2/24

set interfaces lo0.0 family inet address 200.2.2.2/32

set protocols ospf area 1 stub interface lo0.0 passive

set protocols ospf area 1 stub interface fe-0/0/0.0

I can't get a default route 0/0 injected by R1 as ABR into stub area 1 on R2. What maybe wrong? Thanks in advance.

Hello,

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@danila.filin wrote:

What maybe wrong? Thanks in advance.

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Documentation skills?

http://www.juniper.net/techpubs/en_US/junos13.3/topics/topic-map/ospf-stub-and-not-so-stubby-areas.html

default-metric—Configures the ABR to generate a default route with a specified metric into the stub area. This default route enables packet forwarding from the stub area to external destinations. You configure this option only on the ABR. The ABR does not automatically generate a default route when attached to a stub. You must explicitly configure this option to generate a default route.

HTH

Thanks
Alex

Thanks in advance. Tommorow I will check that and kudo you.))

Unfortunately haven't seen this in several books I read in last 2 weeks..

Hello,

---

@danila.filin wrote:

 

Unfortunately haven't seen this in several books I read in last 2 weeks..

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Not enough books, it seems 🙂

OSPF "default-metric" is mentioned in:

1/ JUNOS Enterprise Routing 2nd Ed, page 247,

2/ JNCIP Study Guide, page 180

3/ Juniper Networks Reference Guide JUNOS Routing Configuration and Architecture, section 8.4.15

- and in several other books 

HTH

Thanks

Alex

Unfortunately, still not helped! Could anyone of you, please, test my simple config and correct where I am wrong?

How to get a default route on R2?

Attachment(s)

R2showospf.txt   1 KB 1 version

R2.txt   1 KB 1 version

R1showospf.txt   2 KB 1 version

R1.txt   1 KB 1 version

this is because you don't have any adj with a router in area 0.

on R1(ABR), you have only lo0 in area 0:

    ospf {
        area 0.0.0.0 {
            interface lo0.0 {
                passive;

if R1 would be peering with another router in area 0, then the default route will be generated.

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If this worked for you please flag my post as an "Accepted Solution" so others can benefit. A kudo would be cool if you think I earned it.

Active backbone detection can be supressed through hidden: 

set protocols ospf no-active-backbone   

Best Regards,

Krasi

Alleluia! No that works as expected. That was not obviosly at all, and not in books I was reading...

Thank you all very much.

solved my problem by reading your sentence. Thanks!