OSPF does not convert the area to NSSA
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	craterman
	Jan 11 2021, 11:45 AM

Description

The simple topology. Basic OSPF configuration. And redistribution of 1 static route.

Untitled Diagram.png (211×827 px, 19 KB)

As result the external route will be advertised in LSA type 5.
If we configure R2 and R3 with command set protocols ospf area 1 area-type nssa it will not lead to change LSA type 5 to LSA type 7 on R3.

But if we save configuration and reboot R2 and R3 the command set protocols ospf area 1 area-type nssa converts to set protocols ospf area 1 area-type nssa translate 'candidate' on both routers despite this command should be applied only on ABR. After reboot LSA type 7 appears on R2 and R3, but on R3 external route also presented as LSA type 5 what shouldn't be.

Details

Version: VyOS 1.4-rolling-202101110217
Is it a breaking change?: Unspecified (possibly destroys the router)

Event Timeline

craterman created this task.Jan 11 2021, 11:45 AM

@craterman It the same? https://github.com/FRRouting/frr/issues/739

In T3207#84000, @Viacheslav wrote:

@craterman It the same? https://github.com/FRRouting/frr/issues/739

Yes, it is the second part of my appeal. But the first one is that set protocols ospf area <number> area-type nssa command does not work at all. It does not lead to generate LSA type 7.
Only after reboot the nodes in NSSA start working.
But I think it does not makes sense try to fix something before FRR will be fixed.

pasik subscribed.Jan 13 2021, 9:45 AM

Viacheslav triaged this task as Normal priority.Feb 22 2021, 9:44 AM

Viacheslav edited a custom field.

It seems fixed for rolling release 1.4 because soft has been moved to FRR7.5.1
Of course it is not fixed for rolling release 1.3 (and as I understand won't be) due to FRR7.3.1

dmbaturin added a project: test.Jul 29 2021, 8:57 AM

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