I believe this is due to https://github.com/systemd/systemd/commit/4b151b71320bbee1549afcbad5554a40d90d63b4
and probably is https://github.com/systemd/systemd/issues/12552 fixed by https://github.com/systemd/systemd/pull/12574/commits which prevents the automatic mtu bump when MTUBytes is specified but i'm still uncertain about upstream's link_get_requested_mtu_by_stacked_netdevs() function, that bumps MTU automatically; I might be misunderstanding it, but I don't think it is needed or even correct - but I need to look more closely at it and haven't had time. ** Bug watch added: github.com/systemd/systemd/issues #12552 https://github.com/systemd/systemd/issues/12552 ** Also affects: systemd via https://github.com/systemd/systemd/issues/12552 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1846232 Title: networkd pads interface MTU by 4 bytes for vlan even when told not to Status in curtin: Invalid Status in systemd: Unknown Status in systemd package in Ubuntu: New Bug description: From https://jenkins.ubuntu.com/server/job/curtin-vmtest-devel- amd64/916/console: ====================================================================== FAIL: test_ip_output (vmtests.test_network_vlan.EoanTestNetworkVlan) ---------------------------------------------------------------------- Traceback (most recent call last): File "/var/lib/jenkins/servers/server/workspace/curtin-vmtest-devel-amd64/curtin-916/tests/vmtests/test_network.py", line 311, in test_ip_output routes) File "/var/lib/jenkins/servers/server/workspace/curtin-vmtest-devel-amd64/curtin-916/tests/vmtests/test_network.py", line 337, in check_interface int(ipcfg[key])) AssertionError: 1500 != 1504 -------------------- >> begin captured stdout << --------------------- parsed ip_a dict: interface0: broadcast: 10.245.175.255 group: default inet4: - address: 10.245.168.16 prefixlen: '21' scope: global valid_lft: forever inet6: - address: fec0::d6be:d9ff:fea8:4913 prefixlen: '64' scope: site valid_lft: 86256sec - address: fe80::d6be:d9ff:fea8:4913 prefixlen: '64' scope: link valid_lft: forever interface: interface0 loopback: false lower_up: false mac_address: d4:be:d9:a8:49:13 mtu: '1500' multicast: false qdisc: fq_codel qlen: '1000' running: false state: UP up: false interface1: broadcast: 10.245.188.255 group: default inet4: - address: 10.245.188.2 prefixlen: '24' scope: global valid_lft: forever inet6: - address: fec0::d6be:d9ff:fea8:4915 prefixlen: '64' scope: site valid_lft: 86256sec - address: fe80::d6be:d9ff:fea8:4915 prefixlen: '64' scope: link valid_lft: forever interface: interface1 loopback: false lower_up: false mac_address: d4:be:d9:a8:49:15 mtu: '1504' multicast: false qdisc: fq_codel qlen: '1000' running: false state: UP up: false interface1.2667: broadcast: 10.245.184.255 group: default inet4: - address: 10.245.184.2 prefixlen: '24' scope: global valid_lft: forever inet6: - address: fe80::d6be:d9ff:fea8:4915 prefixlen: '64' scope: link valid_lft: forever interface: interface1.2667 loopback: false lower_up: false mac_address: d4:be:d9:a8:49:15 mtu: '1500' multicast: false qdisc: noqueue qlen: '1000' running: false state: UP up: false vlan_link: interface1 interface1.2668: broadcast: 10.245.185.255 group: default inet4: - address: 10.245.185.1 prefixlen: '24' scope: global valid_lft: forever inet6: - address: fe80::d6be:d9ff:fea8:4915 prefixlen: '64' scope: link valid_lft: forever interface: interface1.2668 loopback: false lower_up: false mac_address: d4:be:d9:a8:49:15 mtu: '1500' multicast: false qdisc: noqueue qlen: '1000' running: false state: UP up: false vlan_link: interface1 interface1.2669: broadcast: 10.245.186.255 group: default inet4: - address: 10.245.186.1 prefixlen: '24' scope: global valid_lft: forever inet6: - address: fe80::d6be:d9ff:fea8:4915 prefixlen: '64' scope: link valid_lft: forever interface: interface1.2669 loopback: false lower_up: false mac_address: d4:be:d9:a8:49:15 mtu: '1500' multicast: false qdisc: noqueue qlen: '1000' running: false state: UP up: false vlan_link: interface1 interface1.2670: broadcast: 10.245.187.255 group: default inet4: - address: 10.245.187.2 prefixlen: '24' scope: global valid_lft: forever inet6: - address: fe80::d6be:d9ff:fea8:4915 prefixlen: '64' scope: link valid_lft: forever interface: interface1.2670 loopback: false lower_up: false mac_address: d4:be:d9:a8:49:15 mtu: '1500' multicast: false qdisc: noqueue qlen: '1000' running: false state: UP up: false vlan_link: interface1 interface2: broadcast: ff:ff:ff:ff:ff:ff group: default inet4: [] inet6: - address: fec0::d6be:d9ff:fea8:4917 prefixlen: '64' scope: site valid_lft: 86256sec - address: fe80::d6be:d9ff:fea8:4917 prefixlen: '64' scope: link valid_lft: forever interface: interface2 loopback: false lower_up: false mac_address: d4:be:d9:a8:49:17 mtu: '1500' multicast: false qdisc: fq_codel qlen: '1000' running: false state: UP up: false interface3: broadcast: ff:ff:ff:ff:ff:ff group: default inet4: [] inet6: - address: fec0::d6be:d9ff:fea8:4919 prefixlen: '64' scope: site valid_lft: 86255sec - address: fe80::d6be:d9ff:fea8:4919 prefixlen: '64' scope: link valid_lft: forever interface: interface3 loopback: false lower_up: false mac_address: d4:be:d9:a8:49:19 mtu: '1500' multicast: false qdisc: fq_codel qlen: '1000' running: false state: UP up: false lo: broadcast: 00:00:00:00:00:00 group: default inet4: - address: 127.0.0.1 prefixlen: '8' scope: host valid_lft: forever inet6: - address: ::1 prefixlen: '128' scope: host valid_lft: forever interface: lo loopback: false lower_up: false mtu: '65536' multicast: false qdisc: noqueue qlen: '1000' running: false state: UNKNOWN up: false ip_route_show: line: 10.245.168.0/21 dev interface0 proto kernel scope link src 10.245.168.16 ip_route_show: line: 10.245.184.0/24 dev interface1.2667 proto kernel scope link src 10.245.184.2 ip_route_show: line: 10.245.185.0/24 dev interface1.2668 proto kernel scope link src 10.245.185.1 ip_route_show: line: 10.245.186.0/24 dev interface1.2669 proto kernel scope link src 10.245.186.1 ip_route_show: line: 10.245.187.0/24 dev interface1.2670 proto kernel scope link src 10.245.187.2 ip_route_show: line: 10.245.188.0/24 dev interface1 proto kernel scope link src 10.245.188.2 network_state iface: address: null control: auto gateway: null index: 0 inet: inet mac_address: d4:be:d9:a8:49:13 mode: static mtu: 1500 name: interface0 subnets: - address: 10.245.168.16/21 dns_nameservers: - 10.245.168.2 gateway: 10.245.168.1 type: static type: physical check_interface: testing ifname:interface0 iface: {'name': 'interface0', 'type': 'physical', 'mac_address': 'd4:be:d9:a8:49:13', 'inet': 'inet', 'mode': 'static', 'mtu': 1500, 'address': None, 'gateway': None, 'subnets': [{'address': '10.245.168.16/21', 'dns_nameservers': ['10.245.168.2'], 'gateway': '10.245.168.1', 'type': 'static'}], 'index': 0, 'control': 'auto'} ipcfg: {'inet4': [{'address': '10.245.168.16', 'prefixlen': '21', 'scope': 'global', 'valid_lft': 'forever'}], 'inet6': [{'address': 'fec0::d6be:d9ff:fea8:4913', 'prefixlen': '64', 'scope': 'site', 'valid_lft': '86256sec'}, {'address': 'fe80::d6be:d9ff:fea8:4913', 'prefixlen': '64', 'scope': 'link', 'valid_lft': 'forever'}], 'interface': 'interface0', 'broadcast': '10.245.175.255', 'loopback': False, 'lower_up': False, 'multicast': False, 'running': False, 'up': False, 'mtu': '1500', 'qdisc': 'fq_codel', 'state': 'UP', 'group': 'default', 'qlen': '1000', 'mac_address': 'd4:be:d9:a8:49:13'} ifname=interface0 ipcfg['interface']=interface0 checking mac on iface: interface0 checking mtu on iface: interface0 validating subnet: {'address': '10.245.168.16/21', 'dns_nameservers': ['10.245.168.2'], 'gateway': '10.245.168.1', 'type': 'static'} found addresses: [{'address': '10.245.168.16', 'prefixlen': '21', 'scope': 'global', 'valid_lft': 'forever'}] cur ip={'address': '10.245.168.16', 'prefixlen': '21', 'scope': 'global', 'valid_lft': 'forever'} subnet={'address': '10.245.168.16/21', 'dns_nameservers': ['10.245.168.2'], 'gateway': '10.245.168.1', 'type': 'static'} found a match! returning inet iface iface:interface0 configured_gws: ['10.245.168.1'] found_gws: ['default via 10.245.168.1 dev interface0 proto static '] expected: ['10.245.168.1'] network_state iface: address: null control: auto gateway: null index: 0 inet: inet mac_address: d4:be:d9:a8:49:15 mode: static mtu: 1500 name: interface1 subnets: - address: 10.245.188.2/24 dns_nameservers: [] type: static type: physical check_interface: testing ifname:interface1 iface: {'name': 'interface1', 'type': 'physical', 'mac_address': 'd4:be:d9:a8:49:15', 'inet': 'inet', 'mode': 'static', 'mtu': 1500, 'address': None, 'gateway': None, 'subnets': [{'address': '10.245.188.2/24', 'dns_nameservers': [], 'type': 'static'}], 'index': 0, 'control': 'auto'} ipcfg: {'inet4': [{'address': '10.245.188.2', 'prefixlen': '24', 'scope': 'global', 'valid_lft': 'forever'}], 'inet6': [{'address': 'fec0::d6be:d9ff:fea8:4915', 'prefixlen': '64', 'scope': 'site', 'valid_lft': '86256sec'}, {'address': 'fe80::d6be:d9ff:fea8:4915', 'prefixlen': '64', 'scope': 'link', 'valid_lft': 'forever'}], 'interface': 'interface1', 'broadcast': '10.245.188.255', 'loopback': False, 'lower_up': False, 'multicast': False, 'running': False, 'up': False, 'mtu': '1504', 'qdisc': 'fq_codel', 'state': 'UP', 'group': 'default', 'qlen': '1000', 'mac_address': 'd4:be:d9:a8:49:15'} ifname=interface1 ipcfg['interface']=interface1 checking mac on iface: interface1 checking mtu on iface: interface1 --------------------- >> end captured stdout << ---------------------- To manage notifications about this bug go to: https://bugs.launchpad.net/curtin/+bug/1846232/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
