Bug 76075

Summary:	systemd-networkd: won't bring up interface with many VLANs
Product:	systemd	Reporter:	Malte Starostik <bugs>
Component:	general	Assignee:	Tom Gundersen <teg>
Status:	RESOLVED FIXED	QA Contact:	systemd-bugs
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	test script

Description Malte Starostik 2014-03-12 12:38:43 UTC

Created attachment 95657 [details]
test script

systemd-networkd fails to properly bring up a network interface when the number of VLANs configured on it exceeds a certain amount. The exact number of VLANs required to trigger the problem varies, but in general it starts to get unreliable somewhere at 20+ VLANs.

The problem is in the failing case, the underlying interface's link is not brought up and thus all the VLANs sit there in M-DOWN state.  Once the link is brought up with e.g. ip link set enp11s0f0 up and systemd-networkd restarted, things start to work even after failure.

A script to test this is attached, contains two configurables and a safety measure.

Affected system runs Gentoo, first noticed with 210, still happens with 211.

Working case with 10 VLANs:

512: test-2@enp11s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
513: test-3@enp11s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
514: test-4@enp11s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
515: test-5@enp11s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
516: test-6@enp11s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
517: test-7@enp11s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
518: test-8@enp11s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
519: test-9@enp11s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
520: test-10@enp11s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
509: enp11s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT qlen 1000
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
510: enp11s0f1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT qlen 1000
    link/ether a4:4c:11:de:6d:e1 brd ff:ff:ff:ff:ff:ff
511: test-1@enp11s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff

-- Logs begin at Tue 2014-03-11 14:52:35 CET, end at Wed 2014-03-12 13:27:00 CET. --
Mar 12 13:26:57 jmbvirt04 systemd[1]: Stopped Network Service.
Mar 12 13:26:57 jmbvirt04 systemd[1]: Starting Network Service...
Mar 12 13:26:57 jmbvirt04 systemd-networkd[3240]: test-1: netdev ready
Mar 12 13:26:57 jmbvirt04 systemd-networkd[3240]: test-2: netdev ready
Mar 12 13:26:57 jmbvirt04 systemd-networkd[3240]: test-3: netdev ready
Mar 12 13:26:57 jmbvirt04 systemd-networkd[3240]: test-4: netdev ready
Mar 12 13:26:57 jmbvirt04 systemd-networkd[3240]: test-5: netdev ready
Mar 12 13:26:57 jmbvirt04 systemd-networkd[3240]: test-6: netdev ready
Mar 12 13:26:57 jmbvirt04 systemd[1]: Started Network Service.
Mar 12 13:26:57 jmbvirt04 systemd-networkd[3240]: test-7: netdev ready
Mar 12 13:26:57 jmbvirt04 systemd-networkd[3240]: test-8: netdev ready
Mar 12 13:26:57 jmbvirt04 systemd-networkd[3240]: test-9: netdev ready
Mar 12 13:26:57 jmbvirt04 systemd-networkd[3240]: test-10: netdev ready
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: enp11s0f0: link configured
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-2: link configured
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: enp11s0f0: link is up
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-7: link configured
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-4: link configured
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-2: link is up
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-1: link configured
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-4: link is up
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-5: link configured
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-5: link is up
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-9: link configured
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-3: link configured
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-7: link is up
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-6: link configured
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-9: link is up
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-8: link configured
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-10: link configured
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-1: link is up
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-3: link is up
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-6: link is up
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-8: link is up
Mar 12 13:26:58 jmbvirt04 systemd-networkd[3240]: test-10: link is up
Mar 12 13:27:00 jmbvirt04 systemd-networkd[3240]: enp11s0f0: carrier on
Mar 12 13:27:00 jmbvirt04 systemd-networkd[3240]: test-1: carrier on
Mar 12 13:27:00 jmbvirt04 systemd-networkd[3240]: test-2: carrier on
Mar 12 13:27:00 jmbvirt04 systemd-networkd[3240]: test-3: carrier on
Mar 12 13:27:00 jmbvirt04 systemd-networkd[3240]: test-4: carrier on
Mar 12 13:27:00 jmbvirt04 systemd-networkd[3240]: test-5: carrier on
Mar 12 13:27:00 jmbvirt04 systemd-networkd[3240]: test-6: carrier on
Mar 12 13:27:00 jmbvirt04 systemd-networkd[3240]: test-7: carrier on
Mar 12 13:27:00 jmbvirt04 systemd-networkd[3240]: test-8: carrier on
Mar 12 13:27:00 jmbvirt04 systemd-networkd[3240]: test-9: carrier on
Mar 12 13:27:00 jmbvirt04 systemd-networkd[3240]: test-10: carrier on

=============

Broken case with 40 VLANs, note the missing link up and link configured messages for enp11s0f0:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
651: enp11s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT qlen 1000
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
652: enp11s0f1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT qlen 1000
    link/ether a4:4c:11:de:6d:e1 brd ff:ff:ff:ff:ff:ff
653: test-1@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
654: test-2@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
655: test-3@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
656: test-4@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
657: test-5@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
658: test-6@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
659: test-7@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
660: test-8@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
661: test-9@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
662: test-10@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
663: test-11@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
664: test-12@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
665: test-13@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
666: test-14@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
667: test-15@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
668: test-16@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
669: test-17@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
670: test-18@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
671: test-19@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
672: test-20@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
673: test-21@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
674: test-22@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
675: test-23@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
676: test-24@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
677: test-25@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
678: test-26@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
679: test-27@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
680: test-28@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
681: test-29@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
682: test-30@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
683: test-31@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
684: test-32@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
685: test-33@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
686: test-34@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
687: test-35@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
688: test-36@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
689: test-37@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
690: test-38@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
691: test-39@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff
692: test-40@enp11s0f0: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN mode DEFAULT 
    link/ether a4:4c:11:de:6d:e0 brd ff:ff:ff:ff:ff:ff

-- Logs begin at Tue 2014-03-11 14:52:35 CET, end at Wed 2014-03-12 13:29:03 CET. --
Mar 12 13:29:01 jmbvirt04 systemd[1]: Stopped Network Service.
Mar 12 13:29:02 jmbvirt04 systemd[1]: Starting Network Service...
Mar 12 13:29:02 jmbvirt04 systemd[1]: Started Network Service.
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-1: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-2: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-6: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-10: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-3: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-12: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-9: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-4: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-18: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-7: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-19: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-14: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-15: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-16: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-26: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-11: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-8: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-13: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-21: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-32: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-24: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-20: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-25: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-27: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-17: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-22: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-35: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-28: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-5: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-23: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-29: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-34: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-33: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-31: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-39: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-40: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-38: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-30: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-37: link configured
Mar 12 13:29:02 jmbvirt04 systemd-networkd[3925]: test-36: link configured

Comment 1 James Kyle 2014-06-19 15:50:14 UTC

This could be related to my bug, though I'm seeing it in a bridge + vlan configuration and only two vlans.

#80031

Comment 2 Lennart Poettering 2019-03-19 12:45:52 UTC

I am pretty sure this has been fixed since. Closing hence. If this is reproducible on current systemd versions (i.e. v240 or v241) please file a new issue on systemd github.

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