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Maniphest T4601

dhcp : relay agent IP address issue.
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Unknown Object (User)
Aug 7 2022, 10:48 PM
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a.hajiyev
n.fort
pasik
pyaskowski
Viacheslav
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Description

The relay agent IP address changed only after rebooting the "VyOS" system. I've noticed it on version 1.4-rolling-202208010217.
The issue makes a problem if you need to change "dhcp ip pool" on your interface.
To repeat the scenario, I've used the configuration:

dhcp server (vyos 1.4)

set interfaces ethernet eth7 address '172.17.17.5/24'
set protocols static route 10.0.0.0/16 next-hop 172.17.17.6
set service dhcp-server shared-network-name X subnet 10.0.5.0/24 default-router '10.0.5.1'
set service dhcp-server shared-network-name X subnet 10.0.5.0/24 lease '8000'
set service dhcp-server shared-network-name X subnet 10.0.5.0/24 range 0 start '10.0.5.5'
set service dhcp-server shared-network-name X subnet 10.0.5.0/24 range 0 stop '10.0.5.50'
set service dhcp-server shared-network-name Y subnet 10.0.0.0/24 default-router '10.0.0.1'
set service dhcp-server shared-network-name Y subnet 10.0.0.0/24 lease '8000'
set service dhcp-server shared-network-name Y subnet 10.0.0.0/24 range 0 start '10.0.0.5'
set service dhcp-server shared-network-name Y subnet 10.0.0.0/24 range 0 stop '10.0.0.50'

dhcp relay (vyos 1.4)

set interfaces ethernet eth7 address '172.17.17.6/24'
set interfaces ethernet eth0 address '10.0.0.1/24' or '10.0.5.1/24'
set service dhcp-relay interface 'eth0'
set service dhcp-relay interface 'eth7'
set service dhcp-relay relay-options relay-agents-packets 'discard'
set service dhcp-relay server '172.17.17.5'

image.png (319×721 px, 23 KB)

image.png (298×1 px, 29 KB)

restart dhcp relay-agent doesn't help.

Details

Difficulty level
Unknown (require assessment)
Version
1.4-rolling-202208010217
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.Aug 7 2022, 10:48 PM
pyaskowski subscribed.Aug 10 2022, 5:45 PM
Unknown Object (User) changed the task status from Open to Confirmed.Aug 16 2022, 12:15 AM

https://github.com/vyos/vyos-1x/pull/1471

Viacheslav changed the task status from Confirmed to Needs testing.Aug 16 2022, 9:58 AM
Viacheslav assigned this task to Unknown Object (User).
Viacheslav subscribed.Aug 17 2022, 11:31 AM

@m.korobeinikov Could you check it in 1.3

pasik subscribed.Aug 17 2022, 2:02 PM
Unknown Object (User) added a comment.Aug 28 2022, 1:13 AM

@Viacheslav I've checked it using "VyOS 1.3.1-S1" version a problem the same.

Built on:         Mon 28 Mar 2022 17:02 UTC

image.png (194×654 px, 17 KB)

Unknown Object (User) added a comment.Aug 28 2022, 1:38 AM

The latest 1.4 works well after merging.

Unknown Object (User) added a project: VyOS 1.3 Equuleus (1.3.0).Aug 28 2022, 9:08 PM
Viacheslav edited projects, added VyOS 1.3 Equuleus (1.3.3); removed VyOS 1.3 Equuleus (1.3.0).Aug 29 2022, 6:21 AM
Viacheslav moved this task from Need Triage to Backport Candidates on the VyOS 1.3 Equuleus (1.3.3) board.
Viacheslav moved this task from Need Triage to Backport Candidates on the VyOS 1.4 Sagitta board.
Viacheslav moved this task from Backport Candidates to Need Triage on the VyOS 1.3 Equuleus (1.3.3) board.
n.fort subscribed.Feb 14 2023, 6:36 PM

Error still present in 1.4: https://vyos.dev/T5004

PR from this task is for fixing op-mode command restart dhcp relay-agent in 1.4. Such command in 1.3 still wrong

syncer edited projects, added VyOS 1.3 Equuleus (1.3.4); removed VyOS 1.3 Equuleus (1.3.3).Jul 12 2023, 9:46 PM
syncer edited projects, added VyOS 1.3 Equuleus (1.3.5); removed VyOS 1.3 Equuleus (1.3.4).Aug 25 2023, 9:29 PM
a.hajiyev subscribed.Nov 30 2023, 6:07 AM

Tested in VyOS 1.4-rolling-202311100309

image.png (439×773 px, 28 KB)

DHCP Server configurations:

set interfaces ethernet eth0 address '172.17.17.5/24'
set protocols static route 10.1.0.0/24 next-hop 172.17.17.6
set protocols static route 10.2.0.0/24 next-hop 172.17.17.6

set service dhcp-server listen-address '172.17.17.5'
set service dhcp-server shared-network-name VyOS-1.4-1 subnet 10.1.0.0/24 default-router '10.1.0.1'
set service dhcp-server shared-network-name VyOS-1.4-1 subnet 10.1.0.0/24 lease '8000'
set service dhcp-server shared-network-name VyOS-1.4-1 subnet 10.1.0.0/24 range 0 start '10.1.0.5'
set service dhcp-server shared-network-name VyOS-1.4-1 subnet 10.1.0.0/24 range 0 stop '10.1.0.50'
set service dhcp-server shared-network-name VyOS-1.4-2 subnet 10.2.0.0/24 default-router '10.2.0.1'
set service dhcp-server shared-network-name VyOS-1.4-2 subnet 10.2.0.0/24 lease '8000'
set service dhcp-server shared-network-name VyOS-1.4-2 subnet 10.2.0.0/24 range 0 start '10.2.0.5'
set service dhcp-server shared-network-name VyOS-1.4-2 subnet 10.2.0.0/24 range 0 stop '10.2.0.50'

DHCP Relay configurations:

set interfaces ethernet eth0 address '172.17.17.6/24'
set interfaces ethernet eth1 vif 11 address '10.1.0.1/24'
set interfaces ethernet eth1 vif 12 address '10.2.0.1/24'

set service dhcp-relay listen-interface 'eth1.11'
set service dhcp-relay listen-interface 'eth1.12'
set service dhcp-relay relay-options relay-agents-packets 'discard'
set service dhcp-relay server '172.17.17.5'
set service dhcp-relay upstream-interface 'eth0'

Checking:

image.png (661×1 px, 86 KB)

image.png (654×1 px, 86 KB)

Resetting new IP addresses for the interface and resetting dhcp relay-agent:

[email protected]# delete interfaces ethernet eth1 vif 11 address
[edit]
[email protected]# delete interfaces ethernet eth1 vif 12 address
[edit]
[email protected]# set interfaces ethernet eth1 vif 11 address '10.1.0.11/24'
[edit]
[email protected]# set interfaces ethernet eth1 vif 12 address '10.2.0.11/24'
[edit]
[email protected]# commit
[edit]
[email protected]# run restart dhcp relay-agent
[edit]

Checking:

image.png (807×1 px, 101 KB)

image.png (684×1 px, 94 KB)

Note: The relay agent IP address changed after the restart dhcp relay-agent command

a.hajiyev added a comment.EditedNov 30 2023, 6:39 AM

Tested in VyOS 1.3.4

image.png (371×806 px, 27 KB)

DHCP Server configurations (VyOS version 1.4):

set interfaces ethernet eth0 address '172.17.17.5/24'
set protocols static route 10.11.0.0/24 next-hop 172.17.17.7
set protocols static route 10.12.0.0/24 next-hop 172.17.17.7

set service dhcp-server listen-address '172.17.17.5'
set service dhcp-server shared-network-name VyOS-1.3-1 subnet 10.11.0.0/24 default-router '10.11.0.1'
set service dhcp-server shared-network-name VyOS-1.3-1 subnet 10.11.0.0/24 lease '8000'
set service dhcp-server shared-network-name VyOS-1.3-1 subnet 10.11.0.0/24 range 0 start '10.11.0.5'
set service dhcp-server shared-network-name VyOS-1.3-1 subnet 10.11.0.0/24 range 0 stop '10.11.0.50'
set service dhcp-server shared-network-name VyOS-1.3-2 subnet 10.12.0.0/24 default-router '10.12.0.1'
set service dhcp-server shared-network-name VyOS-1.3-2 subnet 10.12.0.0/24 lease '8000'
set service dhcp-server shared-network-name VyOS-1.3-2 subnet 10.12.0.0/24 range 0 start '10.12.0.5'
set service dhcp-server shared-network-name VyOS-1.3-2 subnet 10.12.0.0/24 range 0 stop '10.12.0.50'

DHCP Relay configurations (VyOS version 1.3.4):

set interfaces ethernet eth0 address '172.17.17.7/24'
set interfaces ethernet eth1 vif 11 address '10.11.0.1/24'
set interfaces ethernet eth1 vif 12 address '10.12.0.1/24'

set service dhcp-relay interface 'eth0'
set service dhcp-relay interface 'eth1.11'
set service dhcp-relay interface 'eth1.12'
set service dhcp-relay relay-options relay-agents-packets 'discard'
set service dhcp-relay server '172.17.17.5'

Checking:

image.png (798×1 px, 100 KB)

image.png (801×1 px, 107 KB)

Resetting new IP addresses for the interface and resetting dhcp relay-agent:

vyos@DHCP-Relay-1-3# delete interfaces ethernet eth1 vif 11 address
[edit]
vyos@DHCP-Relay-1-3# delete interfaces ethernet eth1 vif 12 address
[edit]                                                                                
vyos@DHCP-Relay-1-3# set interfaces ethernet eth1 vif 11 address '10.11.0.11/24'
[edit]
vyos@DHCP-Relay-1-3# set interfaces ethernet eth1 vif 12 address '10.12.0.11/24'
[edit]
vyos@DHCP-Relay-1-3# commit
[edit]
vyos@DHCP-Relay-1-3# run restart dhcp relay-agent
[edit]

Checking:

image.png (801×1 px, 107 KB)

image.png (802×1 px, 128 KB)

Note: Same as the 1.4 version the relay agent IP address changed after the restart dhcp relay-agent command

a.hajiyev closed this task as Resolved.Nov 30 2023, 6:46 AM
dmbaturin mentioned this in 1.3.5.Dec 4 2023, 10:53 PM
syncer moved this task from Need Triage to Finished on the VyOS 1.3 Equuleus (1.3.5) board.Dec 18 2023, 12:19 AM
c-po moved this task from Backport Candidates to Finished on the VyOS 1.4 Sagitta board.Dec 25 2023, 7:46 AM