How do i make systemd-networkd ignore DHCP pushed default route?

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4
down vote

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I want systemd-networkd ignore the default route/s pushed by DHCP on one interface.

My work setup has 3 network interfaces.
I have one .network file for each interface:

eth0) internet

[Match]

Name=eth0

[Network]

DHCP=yes

DNS=127.0.0.1

eth1) local testing network

[Match]

Name=eth1



[Network]

Address=192.168.78.1/24

IPForward=ipv4

IPMasquerade=yes

DHCPServer=yes



[DHCPServer]

PoolOffset=10

PoolSize=100

EmitDNS=yes

DNS=192.168.78.1

eth2) VPN router connection to main site.

[Match]

Name=eth2



[Network]

DHCP=ipv4



[Route]

Gateway=10.3.10.1

Destination=10.100.102.0/24

Metric=0



[Route]

Gateway=10.3.10.1

Destination=10.3.13.0/24

Metric=0



[Route]

Gateway=10.3.10.1

Destination=10.3.14.0/24

Metric=0



[DHCP]

UseDNS=false

SendHostname=true

UseRoutes=false

RouteMetric=2000

vnet0) bridge interface without connection to real interface for VMs

[Match]

Name=vnet0



[Network]

Address=192.168.77.1/24

IPForward=ipv4

IPMasquerade=yes

DHCPServer=yes



[DHCPServer]

PoolOffset=10

PoolSize=100

EmitDNS=yes

DNS=192.168.77.1

As you can see UseRoutes=false is set, and still I have a default route on the eth2 network:

default via 192.168.178.1 dev eth0  proto dhcp  src 192.168.178.52  metric 1024 

default via 10.3.10.1 dev eth2  proto dhcp  src 10.3.10.196  metric 2000 

10.3.10.0/24 dev eth2  proto kernel  scope link  src 10.3.10.196 

10.3.10.1 dev eth2  proto dhcp  scope link  src 10.3.10.196  metric 2000 

192.168.77.0/24 dev vnet0  proto kernel  scope link  src 192.168.77.1 linkdown 

192.168.78.0/24 dev eth1  proto kernel  scope link  src 192.168.78.1 

192.168.178.0/24 dev eth0  proto kernel  scope link  src 192.168.178.52 

192.168.178.1 dev eth0  proto dhcp  scope link  src 192.168.178.52  metric 1024

I also tried UseRoutes=no which also makes no difference.
Does anyone have any ideas what i am doing wrong?

versions and packages:

mavu  ~  uname -a

Linux saaclt0006 4.3.0-1-amd64 #1 SMP Debian 4.3.3-2 (2015-12-17) x86_64 GNU/Linux



mavu  ~  dpkg -l |grep systemd

ii  libpam-systemd:amd64                          228-2+b1                               amd64        system and service manager - PAM module

rc  libsystemd-daemon0:amd64                      215-5+b1                               amd64        systemd utility library (deprecated)

rc  libsystemd-id128-0:amd64                      215-5+b1                               amd64        systemd 128 bit ID utility library (deprecated)

rc  libsystemd-id128-0:i386                       215-5+b1                               i386         systemd 128 bit ID utility library (deprecated)

rc  libsystemd-journal0:amd64                     215-5+b1                               amd64        systemd journal utility library (deprecated)

rc  libsystemd-journal0:i386                      215-5+b1                               i386         systemd journal utility library (deprecated)

rc  libsystemd-login0:amd64                       215-5+b1                               amd64        systemd login utility library (deprecated)

ii  libsystemd0:amd64                             228-2+b1                               amd64        systemd utility library

ii  libsystemd0:i386                              228-2+b1                               i386         systemd utility library

ii  systemd                                       228-2+b1                               amd64        system and service manager

ii  systemd-shim                                  9-1                                    amd64        shim for systemd

ii  systemd-sysv                                  228-2+b1                               amd64        system and service manager - SysV links

grep systemd-networkd /var/log/syslog :

Jan  7 09:00:56 saaclt0006 systemd-networkd[12179]: wlan0: Lost carrier

Jan  7 09:01:03 saaclt0006 systemd-networkd[12179]: eth0: Gained carrier

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth2: Could not set route: Network is unreachable

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth2: Could not set route: Network is unreachable

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth2: Could not set route: Network is unreachable

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth1: Gained carrier

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth1: Gained IPv6LL

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth1: Configured

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth2: Gained carrier

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth2: DHCPv4 address 10.3.10.196/24 via 10.3.10.1

Jan  7 09:01:07 saaclt0006 systemd-networkd[12179]: eth0: DHCPv4 address 192.168.178.52/24 via 192.168.178.1

Jan  7 09:01:08 saaclt0006 systemd-networkd[12179]: eth2: Gained IPv6LL

Jan  7 09:01:08 saaclt0006 systemd-networkd[12179]: eth2: Configured

Jan  7 09:01:19 saaclt0006 systemd-networkd[12179]: eth1: Starting DHCPv6 client after NDisc timeout failed: Invalid argument

Jan  7 09:01:21 saaclt0006 systemd-networkd[12179]: eth2: Starting DHCPv6 client after NDisc timeout failed: Invalid argument

asked Jan 7 '16 at 8:40

mavu

1014

Cross-posted at github.com/systemd/systemd/issues/2282
– grawity
Jan 7 '16 at 14:05

add a comment |

up vote
4
down vote

favorite

I want systemd-networkd ignore the default route/s pushed by DHCP on one interface.

My work setup has 3 network interfaces.
I have one .network file for each interface:

eth0) internet

[Match]

Name=eth0

[Network]

DHCP=yes

DNS=127.0.0.1

eth1) local testing network

[Match]

Name=eth1



[Network]

Address=192.168.78.1/24

IPForward=ipv4

IPMasquerade=yes

DHCPServer=yes



[DHCPServer]

PoolOffset=10

PoolSize=100

EmitDNS=yes

DNS=192.168.78.1

eth2) VPN router connection to main site.

[Match]

Name=eth2



[Network]

DHCP=ipv4



[Route]

Gateway=10.3.10.1

Destination=10.100.102.0/24

Metric=0



[Route]

Gateway=10.3.10.1

Destination=10.3.13.0/24

Metric=0



[Route]

Gateway=10.3.10.1

Destination=10.3.14.0/24

Metric=0



[DHCP]

UseDNS=false

SendHostname=true

UseRoutes=false

RouteMetric=2000

vnet0) bridge interface without connection to real interface for VMs

[Match]

Name=vnet0



[Network]

Address=192.168.77.1/24

IPForward=ipv4

IPMasquerade=yes

DHCPServer=yes



[DHCPServer]

PoolOffset=10

PoolSize=100

EmitDNS=yes

DNS=192.168.77.1

As you can see UseRoutes=false is set, and still I have a default route on the eth2 network:

default via 192.168.178.1 dev eth0  proto dhcp  src 192.168.178.52  metric 1024 

default via 10.3.10.1 dev eth2  proto dhcp  src 10.3.10.196  metric 2000 

10.3.10.0/24 dev eth2  proto kernel  scope link  src 10.3.10.196 

10.3.10.1 dev eth2  proto dhcp  scope link  src 10.3.10.196  metric 2000 

192.168.77.0/24 dev vnet0  proto kernel  scope link  src 192.168.77.1 linkdown 

192.168.78.0/24 dev eth1  proto kernel  scope link  src 192.168.78.1 

192.168.178.0/24 dev eth0  proto kernel  scope link  src 192.168.178.52 

192.168.178.1 dev eth0  proto dhcp  scope link  src 192.168.178.52  metric 1024

I also tried UseRoutes=no which also makes no difference.
Does anyone have any ideas what i am doing wrong?

versions and packages:

mavu  ~  uname -a

Linux saaclt0006 4.3.0-1-amd64 #1 SMP Debian 4.3.3-2 (2015-12-17) x86_64 GNU/Linux



mavu  ~  dpkg -l |grep systemd

ii  libpam-systemd:amd64                          228-2+b1                               amd64        system and service manager - PAM module

rc  libsystemd-daemon0:amd64                      215-5+b1                               amd64        systemd utility library (deprecated)

rc  libsystemd-id128-0:amd64                      215-5+b1                               amd64        systemd 128 bit ID utility library (deprecated)

rc  libsystemd-id128-0:i386                       215-5+b1                               i386         systemd 128 bit ID utility library (deprecated)

rc  libsystemd-journal0:amd64                     215-5+b1                               amd64        systemd journal utility library (deprecated)

rc  libsystemd-journal0:i386                      215-5+b1                               i386         systemd journal utility library (deprecated)

rc  libsystemd-login0:amd64                       215-5+b1                               amd64        systemd login utility library (deprecated)

ii  libsystemd0:amd64                             228-2+b1                               amd64        systemd utility library

ii  libsystemd0:i386                              228-2+b1                               i386         systemd utility library

ii  systemd                                       228-2+b1                               amd64        system and service manager

ii  systemd-shim                                  9-1                                    amd64        shim for systemd

ii  systemd-sysv                                  228-2+b1                               amd64        system and service manager - SysV links

grep systemd-networkd /var/log/syslog :

Jan  7 09:00:56 saaclt0006 systemd-networkd[12179]: wlan0: Lost carrier

Jan  7 09:01:03 saaclt0006 systemd-networkd[12179]: eth0: Gained carrier

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth2: Could not set route: Network is unreachable

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth2: Could not set route: Network is unreachable

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth2: Could not set route: Network is unreachable

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth1: Gained carrier

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth1: Gained IPv6LL

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth1: Configured

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth2: Gained carrier

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth2: DHCPv4 address 10.3.10.196/24 via 10.3.10.1

Jan  7 09:01:07 saaclt0006 systemd-networkd[12179]: eth0: DHCPv4 address 192.168.178.52/24 via 192.168.178.1

Jan  7 09:01:08 saaclt0006 systemd-networkd[12179]: eth2: Gained IPv6LL

Jan  7 09:01:08 saaclt0006 systemd-networkd[12179]: eth2: Configured

Jan  7 09:01:19 saaclt0006 systemd-networkd[12179]: eth1: Starting DHCPv6 client after NDisc timeout failed: Invalid argument

Jan  7 09:01:21 saaclt0006 systemd-networkd[12179]: eth2: Starting DHCPv6 client after NDisc timeout failed: Invalid argument

asked Jan 7 '16 at 8:40

mavu

1014

Cross-posted at github.com/systemd/systemd/issues/2282
– grawity
Jan 7 '16 at 14:05

add a comment |

up vote
4
down vote

favorite

I want systemd-networkd ignore the default route/s pushed by DHCP on one interface.

My work setup has 3 network interfaces.
I have one .network file for each interface:

eth0) internet

[Match]

Name=eth0

[Network]

DHCP=yes

DNS=127.0.0.1

eth1) local testing network

[Match]

Name=eth1



[Network]

Address=192.168.78.1/24

IPForward=ipv4

IPMasquerade=yes

DHCPServer=yes



[DHCPServer]

PoolOffset=10

PoolSize=100

EmitDNS=yes

DNS=192.168.78.1

eth2) VPN router connection to main site.

[Match]

Name=eth2



[Network]

DHCP=ipv4



[Route]

Gateway=10.3.10.1

Destination=10.100.102.0/24

Metric=0



[Route]

Gateway=10.3.10.1

Destination=10.3.13.0/24

Metric=0



[Route]

Gateway=10.3.10.1

Destination=10.3.14.0/24

Metric=0



[DHCP]

UseDNS=false

SendHostname=true

UseRoutes=false

RouteMetric=2000

vnet0) bridge interface without connection to real interface for VMs

[Match]

Name=vnet0



[Network]

Address=192.168.77.1/24

IPForward=ipv4

IPMasquerade=yes

DHCPServer=yes



[DHCPServer]

PoolOffset=10

PoolSize=100

EmitDNS=yes

DNS=192.168.77.1

As you can see UseRoutes=false is set, and still I have a default route on the eth2 network:

default via 192.168.178.1 dev eth0  proto dhcp  src 192.168.178.52  metric 1024 

default via 10.3.10.1 dev eth2  proto dhcp  src 10.3.10.196  metric 2000 

10.3.10.0/24 dev eth2  proto kernel  scope link  src 10.3.10.196 

10.3.10.1 dev eth2  proto dhcp  scope link  src 10.3.10.196  metric 2000 

192.168.77.0/24 dev vnet0  proto kernel  scope link  src 192.168.77.1 linkdown 

192.168.78.0/24 dev eth1  proto kernel  scope link  src 192.168.78.1 

192.168.178.0/24 dev eth0  proto kernel  scope link  src 192.168.178.52 

192.168.178.1 dev eth0  proto dhcp  scope link  src 192.168.178.52  metric 1024

I also tried UseRoutes=no which also makes no difference.
Does anyone have any ideas what i am doing wrong?

versions and packages:

mavu  ~  uname -a

Linux saaclt0006 4.3.0-1-amd64 #1 SMP Debian 4.3.3-2 (2015-12-17) x86_64 GNU/Linux



mavu  ~  dpkg -l |grep systemd

ii  libpam-systemd:amd64                          228-2+b1                               amd64        system and service manager - PAM module

rc  libsystemd-daemon0:amd64                      215-5+b1                               amd64        systemd utility library (deprecated)

rc  libsystemd-id128-0:amd64                      215-5+b1                               amd64        systemd 128 bit ID utility library (deprecated)

rc  libsystemd-id128-0:i386                       215-5+b1                               i386         systemd 128 bit ID utility library (deprecated)

rc  libsystemd-journal0:amd64                     215-5+b1                               amd64        systemd journal utility library (deprecated)

rc  libsystemd-journal0:i386                      215-5+b1                               i386         systemd journal utility library (deprecated)

rc  libsystemd-login0:amd64                       215-5+b1                               amd64        systemd login utility library (deprecated)

ii  libsystemd0:amd64                             228-2+b1                               amd64        systemd utility library

ii  libsystemd0:i386                              228-2+b1                               i386         systemd utility library

ii  systemd                                       228-2+b1                               amd64        system and service manager

ii  systemd-shim                                  9-1                                    amd64        shim for systemd

ii  systemd-sysv                                  228-2+b1                               amd64        system and service manager - SysV links

grep systemd-networkd /var/log/syslog :

Jan  7 09:00:56 saaclt0006 systemd-networkd[12179]: wlan0: Lost carrier

Jan  7 09:01:03 saaclt0006 systemd-networkd[12179]: eth0: Gained carrier

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth2: Could not set route: Network is unreachable

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth2: Could not set route: Network is unreachable

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth2: Could not set route: Network is unreachable

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth1: Gained carrier

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth1: Gained IPv6LL

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth1: Configured

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth2: Gained carrier

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth2: DHCPv4 address 10.3.10.196/24 via 10.3.10.1

Jan  7 09:01:07 saaclt0006 systemd-networkd[12179]: eth0: DHCPv4 address 192.168.178.52/24 via 192.168.178.1

Jan  7 09:01:08 saaclt0006 systemd-networkd[12179]: eth2: Gained IPv6LL

Jan  7 09:01:08 saaclt0006 systemd-networkd[12179]: eth2: Configured

Jan  7 09:01:19 saaclt0006 systemd-networkd[12179]: eth1: Starting DHCPv6 client after NDisc timeout failed: Invalid argument

Jan  7 09:01:21 saaclt0006 systemd-networkd[12179]: eth2: Starting DHCPv6 client after NDisc timeout failed: Invalid argument

asked Jan 7 '16 at 8:40

mavu

1014

I want systemd-networkd ignore the default route/s pushed by DHCP on one interface.

My work setup has 3 network interfaces.
I have one .network file for each interface:

eth0) internet

[Match]

Name=eth0

[Network]

DHCP=yes

DNS=127.0.0.1

eth1) local testing network

[Match]

Name=eth1



[Network]

Address=192.168.78.1/24

IPForward=ipv4

IPMasquerade=yes

DHCPServer=yes



[DHCPServer]

PoolOffset=10

PoolSize=100

EmitDNS=yes

DNS=192.168.78.1

eth2) VPN router connection to main site.

[Match]

Name=eth2



[Network]

DHCP=ipv4



[Route]

Gateway=10.3.10.1

Destination=10.100.102.0/24

Metric=0



[Route]

Gateway=10.3.10.1

Destination=10.3.13.0/24

Metric=0



[Route]

Gateway=10.3.10.1

Destination=10.3.14.0/24

Metric=0



[DHCP]

UseDNS=false

SendHostname=true

UseRoutes=false

RouteMetric=2000

vnet0) bridge interface without connection to real interface for VMs

[Match]

Name=vnet0



[Network]

Address=192.168.77.1/24

IPForward=ipv4

IPMasquerade=yes

DHCPServer=yes



[DHCPServer]

PoolOffset=10

PoolSize=100

EmitDNS=yes

DNS=192.168.77.1

As you can see UseRoutes=false is set, and still I have a default route on the eth2 network:

default via 192.168.178.1 dev eth0  proto dhcp  src 192.168.178.52  metric 1024 

default via 10.3.10.1 dev eth2  proto dhcp  src 10.3.10.196  metric 2000 

10.3.10.0/24 dev eth2  proto kernel  scope link  src 10.3.10.196 

10.3.10.1 dev eth2  proto dhcp  scope link  src 10.3.10.196  metric 2000 

192.168.77.0/24 dev vnet0  proto kernel  scope link  src 192.168.77.1 linkdown 

192.168.78.0/24 dev eth1  proto kernel  scope link  src 192.168.78.1 

192.168.178.0/24 dev eth0  proto kernel  scope link  src 192.168.178.52 

192.168.178.1 dev eth0  proto dhcp  scope link  src 192.168.178.52  metric 1024

I also tried UseRoutes=no which also makes no difference.
Does anyone have any ideas what i am doing wrong?

versions and packages:

mavu  ~  uname -a

Linux saaclt0006 4.3.0-1-amd64 #1 SMP Debian 4.3.3-2 (2015-12-17) x86_64 GNU/Linux



mavu  ~  dpkg -l |grep systemd

ii  libpam-systemd:amd64                          228-2+b1                               amd64        system and service manager - PAM module

rc  libsystemd-daemon0:amd64                      215-5+b1                               amd64        systemd utility library (deprecated)

rc  libsystemd-id128-0:amd64                      215-5+b1                               amd64        systemd 128 bit ID utility library (deprecated)

rc  libsystemd-id128-0:i386                       215-5+b1                               i386         systemd 128 bit ID utility library (deprecated)

rc  libsystemd-journal0:amd64                     215-5+b1                               amd64        systemd journal utility library (deprecated)

rc  libsystemd-journal0:i386                      215-5+b1                               i386         systemd journal utility library (deprecated)

rc  libsystemd-login0:amd64                       215-5+b1                               amd64        systemd login utility library (deprecated)

ii  libsystemd0:amd64                             228-2+b1                               amd64        systemd utility library

ii  libsystemd0:i386                              228-2+b1                               i386         systemd utility library

ii  systemd                                       228-2+b1                               amd64        system and service manager

ii  systemd-shim                                  9-1                                    amd64        shim for systemd

ii  systemd-sysv                                  228-2+b1                               amd64        system and service manager - SysV links

grep systemd-networkd /var/log/syslog :

Jan  7 09:00:56 saaclt0006 systemd-networkd[12179]: wlan0: Lost carrier

Jan  7 09:01:03 saaclt0006 systemd-networkd[12179]: eth0: Gained carrier

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth2: Could not set route: Network is unreachable

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth2: Could not set route: Network is unreachable

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth2: Could not set route: Network is unreachable

Jan  7 09:01:05 saaclt0006 systemd-networkd[12179]: eth1: Gained carrier

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth1: Gained IPv6LL

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth1: Configured

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth2: Gained carrier

Jan  7 09:01:06 saaclt0006 systemd-networkd[12179]: eth2: DHCPv4 address 10.3.10.196/24 via 10.3.10.1

Jan  7 09:01:07 saaclt0006 systemd-networkd[12179]: eth0: DHCPv4 address 192.168.178.52/24 via 192.168.178.1

Jan  7 09:01:08 saaclt0006 systemd-networkd[12179]: eth2: Gained IPv6LL

Jan  7 09:01:08 saaclt0006 systemd-networkd[12179]: eth2: Configured

Jan  7 09:01:19 saaclt0006 systemd-networkd[12179]: eth1: Starting DHCPv6 client after NDisc timeout failed: Invalid argument

Jan  7 09:01:21 saaclt0006 systemd-networkd[12179]: eth2: Starting DHCPv6 client after NDisc timeout failed: Invalid argument

networking dhcp systemd

asked Jan 7 '16 at 8:40

mavu

1014

asked Jan 7 '16 at 8:40

mavu

1014

asked Jan 7 '16 at 8:40

mavu

1014

asked Jan 7 '16 at 8:40

mavu

1014

asked Jan 7 '16 at 8:40

mavu

1014

Cross-posted at github.com/systemd/systemd/issues/2282
– grawity
Jan 7 '16 at 14:05

add a comment |

Cross-posted at github.com/systemd/systemd/issues/2282
– grawity
Jan 7 '16 at 14:05

Cross-posted at github.com/systemd/systemd/issues/2282
– grawity
Jan 7 '16 at 14:05

add a comment |

1 Answer
1

active

oldest

votes

up vote
0
down vote

This issue was indeed a bug and was fixed in systemd version 230.

networkd: respect DHCP UseRoutes option (#3075)

answered Nov 22 at 1:47

sshow

7061818

add a comment |

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This issue was indeed a bug and was fixed in systemd version 230.

networkd: respect DHCP UseRoutes option (#3075)

answered Nov 22 at 1:47

sshow

7061818

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up vote
0
down vote

This issue was indeed a bug and was fixed in systemd version 230.

networkd: respect DHCP UseRoutes option (#3075)

answered Nov 22 at 1:47

sshow

7061818

add a comment |

up vote
0
down vote

This issue was indeed a bug and was fixed in systemd version 230.

networkd: respect DHCP UseRoutes option (#3075)

answered Nov 22 at 1:47

sshow

7061818

This issue was indeed a bug and was fixed in systemd version 230.

networkd: respect DHCP UseRoutes option (#3075)

answered Nov 22 at 1:47

sshow

7061818

answered Nov 22 at 1:47

sshow

7061818

answered Nov 22 at 1:47

sshow

7061818

answered Nov 22 at 1:47

sshow

7061818

add a comment |

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