OSPF incorrectly set ASBR flag in router lsa when unset nssa area #17084
Description
Description
When OSPF is configured with nssa, if hello-multiplier is set on the backbone interface, Type4 LSA will be generated incorrectly.
Version
10.3(with latest commit in master branch)
How to reproduce
Consider two routers r2, r4 and following topo.
+--------+ +--------+
| | area 0 | |
| r2 +-----------------+ r4 |
| | | |
+---+----+ +----+---+
| |
| |
| |
| |
+++ area 2 +++ area 1
| | stub network | | stub network
| | nssa | |
| | | |
+-+ +-+
r2 conf is
interface r2-eth3
ip address 133.212.247.199/15
exit
!
interface r2-eth5
ip address 207.235.166.38/17
ip ospf dead-interval minimal hello-multiplier 10
exit
!
router ospf
ospf router-id 0.0.0.2
timers throttle spf 0 0 1
network 133.212.247.199/32 area 0.0.0.1
network 207.235.166.38/32 area 0.0.0.0
exit
r4 conf is
interface r2-eth3
ip address 133.212.247.199/15
exit
!
interface r2-eth5
ip address 207.235.166.38/17
ip ospf dead-interval minimal hello-multiplier 10
exit
!
router ospf
ospf router-id 0.0.0.2
timers throttle spf 0 0 1
network 133.212.247.199/32 area 0.0.0.1
network 207.235.166.38/32 area 0.0.0.0
exit
Expected behavior
When we check r2's database, we should get only type1, type 2, type 3 lsa.
Router Link States (Area 0.0.0.0)
Link ID ADV Router Age Seq# CkSum Link count
0.0.0.2 0.0.0.2 20 0x80000005 0x32fe 1
0.0.0.4 0.0.0.4 20 0x80000005 0x0a22 1
Net Link States (Area 0.0.0.0)
Link ID ADV Router Age Seq# CkSum
207.235.166.37 0.0.0.4 21 0x80000001 0xf651
Summary Link States (Area 0.0.0.0)
Link ID ADV Router Age Seq# CkSum Route
133.212.0.0 0.0.0.2 21 0x80000001 0xfdf9 133.212.0.0/15
177.64.0.0 0.0.0.4 22 0x80000001 0x324a 177.64.0.0/11
Router Link States (Area 0.0.0.1)
Link ID ADV Router Age Seq# CkSum Link count
0.0.0.2 0.0.0.2 21 0x80000002 0xa148 1
Summary Link States (Area 0.0.0.1)
Link ID ADV Router Age Seq# CkSum Route
177.64.0.0 0.0.0.2 15 0x80000001 0xa2d1 177.64.0.0/11
207.235.128.0 0.0.0.2 20 0x80000002 0x2271 207.235.128.0/17
Actual behavior
r2 generated wrong type4 LSA
ASBR-Summary Link States (Area 0.0.0.1)
Link ID ADV Router Age Seq# CkSum
0.0.0.4 0.0.0.2 15 0x80000001 0x8dbe
Additional context
No response
Checklist
- I have searched the open issues for this bug.
- I have not included sensitive information in this report.