Bug#1142714: [Pkg-utopia-maintainers] Bug#1142714: network-manager: NetworkManager 1.58.0 ignores DHCP Router (Option 3) when Option 121 is present

2026-07-24 Thread Bogdan Vasiliev 
Hi,

The upstream issue is NetworkManager#1990

.

Bogdan

On Fri, Jul 24, 2026 at 10:52 PM Michael Biebl  wrote:

> Am 24.07.26 um 19:51 schrieb Michael Biebl:
> > Hi Bogdan,
> >
> > thanks for the feedback.
> >
> > Please report this issue to upstream then at
> > https://gitlab.freedesktop.org/NetworkManager/
> >
>
> Small correction:
>
> https://gitlab.freedesktop.org/NetworkManager/NetworkManager
>

Bug#1142714: [Pkg-utopia-maintainers] Bug#1142714: network-manager: NetworkManager 1.58.0 ignores DHCP Router (Option 3) when Option 121 is present

2026-07-24 Thread Michael Biebl 

Am 24.07.26 um 19:51 schrieb Michael Biebl:

Hi Bogdan,

thanks for the feedback.

Please report this issue to upstream then at
https://gitlab.freedesktop.org/NetworkManager/



Small correction:

https://gitlab.freedesktop.org/NetworkManager/NetworkManager


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Bug#1142714: [Pkg-utopia-maintainers] Bug#1142714: network-manager: NetworkManager 1.58.0 ignores DHCP Router (Option 3) when Option 121 is present

2026-07-24 Thread Michael Biebl 

Hi Bogdan,

thanks for the feedback.

Please report this issue to upstream then at
https://gitlab.freedesktop.org/NetworkManager/

(and please report back with the issue number so I can mark the issue as 
forwarded accordingly).


Debian doesn't ship any patches in that regard, so this needs to be 
handled by upstream in case there is a regression.


Thanks,
Michael

Am 24.07.26 um 17:43 schrieb Bogdan Vasiliev:

Hi,

No. I did not configure dhclient or any other DHCP backend in /etc/ 
NetworkManager/.


$ journalctl -b -u NetworkManager | grep "DHCP client"
NetworkManager[1094]:   [1784899570.9235] dhcp: init: Using DHCP 
client 'internal'


Bogdan


On Fri, Jul 24, 2026 at 8:09 PM Michael Biebl > wrote:


Control: tags -1 + moreinfo

Hi,

did you use dhclient as dhcp backend via some custom setting in
/etc/NetworkManager/?

Michael

Am 24.07.26 um 15:20 schrieb Bogdan Vasiliev:
 > Package: network-manager
 > Version: 1.58.0-2
 > Severity: important
 > X-Debbugs-Cc: [email protected]

 >
 > After upgrading from NetworkManager 1.56.1 to 1.58.0, the default
gateway received via DHCP Option 3 is no longer installed if the
DHCP reply also contains RFC3442 Classless Static Routes (Option 121).
 >
 > Client tcpdump:
 > tcpdump: listening on eno1, link-type EN10MB (Ethernet), snapshot
length 262144 bytes
 > 17:58:43.082398 ***:f5:e1 > ff:ff:ff:ff:ff:ff, ethertype IPv4
(0x0800), length 333: (tos 0x0, ttl 64, id 0, offset 0, flags [DF],
proto UDP (17), length 319)
 >      0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP,
Request from ***:f5:e1, length 291, xid 0xa0bdfb95, secs 1, Flags
[none] (0x)
 >         Client-Ethernet-Address ***:f5:e1
 >         Vendor-rfc1048 Extensions
 >           Magic Cookie 0x63825363
 >           DHCP-Message (53), length 1: Request
 >           Client-ID (61), length 7: ether ***:f5:e1
 >           Parameter-Request (55), length 17:
 >             Subnet-Mask (1), Time-Zone (2), Domain-Name-Server
(6), Hostname (12)
 >             Domain-Name (15), MTU (26), BR (28), Classless-
Static-Route (121)
 >             Default-Gateway (3), Static-Route (33), YD (40), YS (41)
 >             NTP (42), Unknown (119), Classless-Static-Route-
Microsoft (249), Unknown (252)
 >             RP (17)
 >           MSZ (57), length 2: 576
 >           Requested-IP (50), length 4: 10.10.10.2
 >           Hostname (12), length 7: "chronos"
 >           END (255), length 0
 > 17:58:43.086579 ***:aa:5e > ***:f5:e1, ethertype IPv4 (0x0800),
length 364: (tos 0xc0, ttl 64, id 151, offset 0, flags [none], proto
UDP (17), length 350)
 >      10.10.10.1.67 > 10.10.10.2.68: [udp sum ok] BOOTP/DHCP,
Reply, length 322, xid 0xa0bdfb95, secs 1, Flags [none] (0x)
 >         Your-IP 10.10.10.2
 >         Server-IP 10.10.10.1
 >         Client-Ethernet-Address ***:f5:e1
 >         Vendor-rfc1048 Extensions
 >           Magic Cookie 0x63825363
 >           DHCP-Message (53), length 1: ACK
 >           Server-ID (54), length 4: 10.10.10.1
 >           Lease-Time (51), length 4: 86400
 >           RN (58), length 4: 43200
 >           RB (59), length 4: 75600
 >           Subnet-Mask (1), length 4: 255.255.255.0
 >           BR (28), length 4: 10.10.10.255
 >           Default-Gateway (3), length 4: 10.10.10.1
 >           Domain-Name (15), length 3: "***"
 >           Hostname (12), length 7: "*"
 >           Classless-Static-Route (121), length 8:
(10.10.20.0/24:10.10.10.3 )
 >           NTP (42), length 4: 10.10.10.1
 >           Domain-Name-Server (6), length 4: 10.10.10.1
 >           END (255), length 0
 >
 >
 > $ nmcli connection show LAN | grep -E 'DHCP4|IP4|ignore-auto-
routes|route-table'
 > IP4.ADDRESS[1]: 10.10.10.2/24 
 > IP4.GATEWAY:                            --
 > IP4.ROUTE[1]:                           dst = 10.10.10.0/24
, nh = 0.0.0.0, mt = 100
 > IP4.ROUTE[2]:                           dst = 10.10.20.0/24
, nh = 10.10.10.3, mt = 100
 > IP4.DNS[1]:                             10.10.10.1
 > IP4.DOMAIN[1]:                          ***
 > DHCP4.OPTION[1]:                        broadcast_address =
10.10.10.255
 > DHCP4.OPTION[2]:                        dhcp_client_identifier =
01:***:f5:e1
 > DHCP4.OPTION[3]:                        dhcp_lease_time = 86400
 > DHCP4.OPTION[4]:                        dhcp_server_identifier =
10.10.10.1
 > DHCP4.OPTION[5]:                        domain_name = lan
 > DHCP4.OPTION[6]:                        domain_name_servers =
10.10.10.1

Bug#1142714: [Pkg-utopia-maintainers] Bug#1142714: network-manager: NetworkManager 1.58.0 ignores DHCP Router (Option 3) when Option 121 is present

2026-07-24 Thread Michael Biebl 

Control: tags -1 + moreinfo

Hi,

did you use dhclient as dhcp backend via some custom setting in 
/etc/NetworkManager/?


Michael

Am 24.07.26 um 15:20 schrieb Bogdan Vasiliev:

Package: network-manager
Version: 1.58.0-2
Severity: important
X-Debbugs-Cc: [email protected]

After upgrading from NetworkManager 1.56.1 to 1.58.0, the default gateway 
received via DHCP Option 3 is no longer installed if the DHCP reply also 
contains RFC3442 Classless Static Routes (Option 121).

Client tcpdump:
tcpdump: listening on eno1, link-type EN10MB (Ethernet), snapshot length 262144 
bytes
17:58:43.082398 ***:f5:e1 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 
333: (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 319)
 0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from 
***:f5:e1, length 291, xid 0xa0bdfb95, secs 1, Flags [none] (0x)
  Client-Ethernet-Address ***:f5:e1
  Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: Request
Client-ID (61), length 7: ether ***:f5:e1
Parameter-Request (55), length 17:
  Subnet-Mask (1), Time-Zone (2), Domain-Name-Server (6), Hostname 
(12)
  Domain-Name (15), MTU (26), BR (28), Classless-Static-Route (121)
  Default-Gateway (3), Static-Route (33), YD (40), YS (41)
  NTP (42), Unknown (119), Classless-Static-Route-Microsoft (249), 
Unknown (252)
  RP (17)
MSZ (57), length 2: 576
Requested-IP (50), length 4: 10.10.10.2
Hostname (12), length 7: "chronos"
END (255), length 0
17:58:43.086579 ***:aa:5e > ***:f5:e1, ethertype IPv4 (0x0800), length 364: 
(tos 0xc0, ttl 64, id 151, offset 0, flags [none], proto UDP (17), length 350)
 10.10.10.1.67 > 10.10.10.2.68: [udp sum ok] BOOTP/DHCP, Reply, length 322, 
xid 0xa0bdfb95, secs 1, Flags [none] (0x)
  Your-IP 10.10.10.2
  Server-IP 10.10.10.1
  Client-Ethernet-Address ***:f5:e1
  Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message (53), length 1: ACK
Server-ID (54), length 4: 10.10.10.1
Lease-Time (51), length 4: 86400
RN (58), length 4: 43200
RB (59), length 4: 75600
Subnet-Mask (1), length 4: 255.255.255.0
BR (28), length 4: 10.10.10.255
Default-Gateway (3), length 4: 10.10.10.1
Domain-Name (15), length 3: "***"
Hostname (12), length 7: "*"
Classless-Static-Route (121), length 8: (10.10.20.0/24:10.10.10.3)
NTP (42), length 4: 10.10.10.1
Domain-Name-Server (6), length 4: 10.10.10.1
END (255), length 0


$ nmcli connection show LAN | grep -E 'DHCP4|IP4|ignore-auto-routes|route-table'
IP4.ADDRESS[1]: 10.10.10.2/24
IP4.GATEWAY:--
IP4.ROUTE[1]:   dst = 10.10.10.0/24, nh = 0.0.0.0, mt = 
100
IP4.ROUTE[2]:   dst = 10.10.20.0/24, nh = 10.10.10.3, 
mt = 100
IP4.DNS[1]: 10.10.10.1
IP4.DOMAIN[1]:  ***
DHCP4.OPTION[1]:broadcast_address = 10.10.10.255
DHCP4.OPTION[2]:dhcp_client_identifier = 01:***:f5:e1
DHCP4.OPTION[3]:dhcp_lease_time = 86400
DHCP4.OPTION[4]:dhcp_server_identifier = 10.10.10.1
DHCP4.OPTION[5]:domain_name = lan
DHCP4.OPTION[6]:domain_name_servers = 10.10.10.1
DHCP4.OPTION[7]:expiry = 1784984378
DHCP4.OPTION[8]:host_name = 
DHCP4.OPTION[9]:ip_address = 10.10.10.2
DHCP4.OPTION[10]:   next_server = 10.10.10.1
DHCP4.OPTION[11]:   ntp_servers = 10.10.10.1
DHCP4.OPTION[12]:   requested_broadcast_address = 1
DHCP4.OPTION[13]:   requested_domain_name = 1
DHCP4.OPTION[14]:   requested_domain_name_servers = 1
DHCP4.OPTION[15]:   requested_domain_search = 1
DHCP4.OPTION[16]:   requested_host_name = 1
DHCP4.OPTION[17]:   requested_interface_mtu = 1
DHCP4.OPTION[18]:   requested_ms_classless_static_routes = 1
DHCP4.OPTION[19]:   requested_nis_domain = 1
DHCP4.OPTION[20]:   requested_nis_servers = 1
DHCP4.OPTION[21]:   requested_ntp_servers = 1
DHCP4.OPTION[22]:   
requested_rfc3442_classless_static_routes = 1
DHCP4.OPTION[23]:   requested_root_path = 1
DHCP4.OPTION[24]:   requested_routers = 1
DHCP4.OPTION[25]:   requested_static_routes = 1
DHCP4.OPTION[26]: