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ISIS - advertise-passive-only not install route in the RIB
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Description

hi

if we use the command set protocols isis advertise-passive-only to advertise only the subnet associate the passive interface , it doesn't allow to install any route on the RIB ( in IPv4/IPv6) , here is the basic setting to replicate it "

interfaces 
set interfaces dummy dum0 address '2001:db8:2:2::20/64'
set interfaces dummy dum10 address '10.0.2.12/24'

set interfaces ethernet eth1 address '2001:db8:3::2/64'
set interfaces ethernet eth1 address '172.16.120.2/24'
set interfaces ethernet eth1 mtu '1500'

# isis - configuration 

set protocols isis dynamic-hostname
set protocols isis advertise-passive-only
set protocols isis interface dum0 passive
set protocols isis interface dum10 passive
set protocols isis interface eth1 circuit-type 'level-2-only'
set protocols isis interface eth1 network point-to-point
set protocols isis level 'level-2'
set protocols isis net '49.0001.0bad.cafe.0002.00'

Details

Version
VyOS 1.4.0
Is it a breaking change?
Perfectly compatible
Issue type
Bug (incorrect behavior)

Event Timeline

fernando created this task.Jun 25 2024, 12:27 PM
pasik subscribed.Jun 25 2024, 12:40 PM
Viacheslav triaged this task as Normal priority.Jun 25 2024, 2:01 PM
Michael.leggatt subscribed.Jun 26 2024, 11:46 AM
fernando changed the task status from Open to Confirmed.Jul 1 2024, 8:24 PM

I've created the FRR bug report :

https://github.com/FRRouting/frr/issues/16325

dmbaturin added a project: Bugs.Sep 15 2024, 5:03 PM
syncer added a subscriber: Global Notifications.Nov 1 2024, 9:19 PM
dmbaturin subscribed.May 6 2025, 2:41 PM

@fernando Could you please re-test in the latest rolling release image?

dmbaturin edited projects, added VyOS 1.4 Sagitta (1.4.3); removed Bugs, VyOS 1.4 Sagitta.May 6 2025, 2:42 PM
a.hajiyev subscribed.EditedMay 19 2025, 5:52 AM

Tested in VyOS 2025.03.09-0613-rolling the issue persists
Configuration:

set system host-name R-01
set interfaces dummy dum0 address '192.0.2.1/32'
set interfaces dummy dum10 address '2001:db8:2:2::21/64'
set interfaces ethernet eth1 address '10.0.0.1/30'
set protocols isis dynamic-hostname
set protocols isis advertise-passive-only
set protocols isis interface dum0 passive
set protocols isis interface dum10 passive
set protocols isis interface eth1 circuit-type 'level-2-only'
set protocols isis interface eth1 network point-to-point
set protocols isis level 'level-2'
set protocols isis net '49.0001.0bad.cafe.0001.00'


set system host-name R-02
set interfaces dummy dum0 address '192.0.2.2/32'
set interfaces dummy dum10 address '2001:db8:2:2::22/64'
set interfaces ethernet eth1 address '10.0.0.2/30'
set protocols isis dynamic-hostname
set protocols isis advertise-passive-only
set protocols isis interface dum0 passive
set protocols isis interface dum10 passive
set protocols isis interface eth1 circuit-type 'level-2-only'
set protocols isis interface eth1 network point-to-point
set protocols isis level 'level-2'
set protocols isis net '49.0001.0bad.cafe.0002.00'
vyos@R-01# run sh ip route isis
[edit]
vyos@R-01#

When we remove set protocols isis advertise-passive-only :

vyos@R-01# delete protocols isis advertise-passive-only
[edit]
vyos@R-01# commit
[edit]
vyos@R-01# run sh ip route isis
Codes: K - kernel route, C - connected, L - local, S - static,
       R - RIP, O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
       T - Table, v - VNC, V - VNC-Direct, A - Babel, F - PBR,
       f - OpenFabric, t - Table-Direct,
       > - selected route, * - FIB route, q - queued, r - rejected, b - backup
       t - trapped, o - offload failure

I>* 192.0.2.2/32 [115/20] via 10.0.0.2, eth1, weight 1, 00:00:10
[edit]
vyos@R-01#
vyos@R-01# sudo vtysh -c "show version"
FRRouting 10.2.1 (R-01) on Linux(6.6.79-vyos).
Copyright 1996-2005 Kunihiro Ishiguro, et al.
[edit]
vyos@R-01# run sh version | grep -i version
Version:          VyOS 2025.03.09-0613-rolling
[edit]
dmbaturin edited projects, added VyOS 1.4 Sagitta (1.4.4), VyOS Rolling; removed VyOS 1.4 Sagitta (1.4.3).Jul 14 2025, 2:04 PM
hedrok subscribed.Sep 19 2025, 8:40 PM

FRR PR: https://github.com/FRRouting/frr/pull/19593
VyOS PR with patch: https://github.com/vyos/vyos-build/pull/1040

a.apostoliuk subscribed.Sep 24 2025, 9:13 AM

Tested https://github.com/vyos/vyos-build/pull/1040. Now it works as expected.

Viacheslav assigned this task to hedrok.Oct 7 2025, 4:34 AM
Unknown Object (User) renamed this task from ISIS - advertise-passive-only not install route in the RIB to ISIS - advertise-passive-only not install route in the RIB.Oct 9 2025, 12:24 PM
Unknown Object (User) edited projects, added VyOS 1.5 Circinus (1.5-stream-2025-Q3); removed VyOS 1.5 Circinus.
Unknown Object (User) closed this task as Resolved.Oct 9 2025, 5:08 PM
Unknown Object (User) moved this task from Need Triage to Completed on the VyOS Rolling board.
Unknown Object (User) moved this task from Backlog to Finished on the VyOS 1.4 Sagitta (1.4.4) board.
Unknown Object (User) moved this task from Open to Finished on the VyOS 1.5 Circinus (1.5-stream-2025-Q3) board.
dmbaturin edited projects, added VyOS 1.5 Circinus (2025.11); removed VyOS 1.5 Circinus (1.5-stream-2025-Q3), VyOS Rolling, VyOS 1.4 Sagitta (1.4.4).Thu, Nov 13, 1:01 AM