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Maniphest T3886

DHCP server can not start
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Description

Faced issue when update from 1.2.8 to 1.3-epa1. The DHCP server can not run and do it silently

set interfaces ethernet eth1 address '198.51.100.254/24'
set interfaces ethernet eth1 address '192.168.100.254/24'

set service dhcp-server shared-network-name HOME-LAN subnet 198.51.100.0/24 default-router '198.51.100.254'
set service dhcp-server shared-network-name HOME-LAN subnet 198.51.100.0/24 range MAIN start '198.51.100.100'
set service dhcp-server shared-network-name HOME-LAN subnet 198.51.100.0/24 range MAIN stop '198.51.100.200'
set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 default-router '192.168.100.254'
set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 domain-search 'example.com'
set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 lease '86400'
set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 name-server '1.1.1.1'
set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 range 0 start '192.168.100.10'
set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 range 0 stop '192.168.100.150'
set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 static-mapping device1 ip-address '192.168.100.13'
set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 static-mapping device1 mac-address '50:00:00:0f:00:00'

CLI commit command does not return any warning or errors when shared-network-name HOME-LAN2 has IP range from the secondary IP address on the interface.
But when I configure only striped part without shared-network-name HOME-LAN , CLI return error message

set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 default-router '192.168.100.254'
set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 domain-search 'example.com'
set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 lease '86400'
set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 name-server '192.168.100.254'
set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 range 0 start '192.168.100.10'
set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 range 0 stop '192.168.100.150'
set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 static-mapping device1 ip-address '192.168.100.13'
set service dhcp-server shared-network-name HOME-LAN2 subnet 192.168.100.0/24 static-mapping device1 mac-address '2c:cc:cc:cc:cc:cc'
vyos@vyos# commit
[ service dhcp-server ]
None of the configured subnets have an appropriate primary IP address on any
broadcast interface configured, nor was there an explicit listen-address
configured for serving DHCP relay packets!

[[service dhcp-server]] failed
Commit failed

Details

Difficulty level
Normal (likely a few hours)
Version
1.3-epa1
Why the issue appeared?
Will be filled on close
Is it a breaking change?
Unspecified (possibly destroys the router)
Issue type
Bug (incorrect behavior)

Related Objects

Event Timeline

Unknown Object (User) created this task.Oct 3 2021, 7:10 PM
pasik added a subscriber: pasik.Oct 3 2021, 7:18 PM
Viacheslav added a subscriber: Viacheslav.EditedOct 4 2021, 1:23 PM

Not sure why we should check the primary ip address, but to fix it possible to change:

if is_subnet_connected(subnet, primary=False)

It was described there T3610 and requires more tests.

The difference in why it works in 1.2 and not in 1.3
1.3 Uses "test" configuration before apply. https://github.com/vyos/vyos-1x/blob/e687502b1cf4a3e15c562a3662afcbe0776b1fe7/src/conf_mode/dhcp_server.py#L284
So there is no a partly configuring service.
Mayve we should to check in verify section.

syncer closed this task as a duplicate of T3610: DHCP-Server creation for not primary IP address fails.Oct 17 2021, 1:25 PM
Viacheslav added a comment.Oct 19 2021, 6:56 AM

All subnets that share the same physical network should be declared within a shared-network declaration

Oct 18 22:24:01 r1-roll dhcpd[4985]: Interface eth2 matches multiple shared networks
syncer moved this task from Need Triage to Finished on the VyOS 1.3 Equuleus board.Nov 6 2021, 11:42 AM
syncer edited projects, added VyOS 1.3 Equuleus (1.3.0); removed VyOS 1.3 Equuleus.Aug 29 2022, 12:16 PM
syncer moved this task from Need Triage to Finished on the VyOS 1.3 Equuleus (1.3.0) board.