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Red Hat Bugzilla – Attachment 1613928 Details for
Bug 1751079
Keep MTU settings of interface if possible after base interface MTU changes
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Reproducer
NM_MTU (text/plain), 2.78 KB, created by
Ales Musil
on 2019-09-11 07:02:09 UTC
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Description:
Reproducer
Filename:
MIME Type:
Creator:
Ales Musil
Created:
2019-09-11 07:02:09 UTC
Size:
2.78 KB
patch
obsolete
>[root@localhost ~]# ip link add dummy_abc type dummy >[root@localhost ~]# nmcli con add type dummy con-name dummy_abc ifname dummy_abc >Connection 'dummy_abc' (b3121098-5bbf-4a2c-88dd-f72486b007dc) successfully added. >[root@localhost ~]# nmcli con modify dummy_abc ipv4.method disabled ipv6.method ignore 802-3-ethernet.mtu 2000 >[root@localhost ~]# nmcli con up dummy_abc >Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/65) >[root@localhost ~]# ip link >76: dummy_abc: <BROADCAST,NOARP,UP,LOWER_UP> mtu 2000 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 > link/ether 42:d6:51:e6:6b:87 brd ff:ff:ff:ff:ff:ff >[root@localhost ~]# nmcli con add type vlan con-name dummy_abc.10 ifname dummy_abc.10 dev dummy_abc id 10 >Connection 'dummy_abc.10' (64531f67-88ee-47ca-ade7-5ea1bdbf87cb) successfully added. >[root@localhost ~]# nmcli con modify dummy_abc.10 ipv4.method disabled ipv6.method ignore 802-3-ethernet.mtu 2000 >[root@localhost ~]# nmcli con up dummy_abc.10 >Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/67) >[root@localhost ~]# ip link >76: dummy_abc: <BROADCAST,NOARP,UP,LOWER_UP> mtu 2000 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 > link/ether 42:d6:51:e6:6b:87 brd ff:ff:ff:ff:ff:ff >77: dummy_abc.10@dummy_abc: <BROADCAST,NOARP,UP,LOWER_UP> mtu 2000 qdisc noqueue state UP mode DEFAULT group default qlen 1000 > link/ether 42:d6:51:e6:6b:87 brd ff:ff:ff:ff:ff:ff >[root@localhost ~]# nmcli con add type vlan con-name dummy_abc.20 ifname dummy_abc.20 dev dummy_abc id 20 >Connection 'dummy_abc.20' (cba86216-9b48-41ed-aa6c-417c19de1047) successfully added. >[root@localhost ~]# nmcli con modify dummy_abc 802-3-ethernet.mtu 2200 >[root@localhost ~]# nmcli con modify dummy_abc.20 ipv4.method disabled ipv6.method ignore 802-3-ethernet.mtu 2200 >[root@localhost ~]# nmcli con up dummy_abc >Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/70) >[root@localhost ~]# nmcli con up dummy_abc.20 >Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/72) >[root@localhost ~]# ip link >76: dummy_abc: <BROADCAST,NOARP,UP,LOWER_UP> mtu 2200 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 > link/ether 42:d6:51:e6:6b:87 brd ff:ff:ff:ff:ff:ff >77: dummy_abc.10@dummy_abc: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000 > link/ether 42:d6:51:e6:6b:87 brd ff:ff:ff:ff:ff:ff >79: dummy_abc.20@dummy_abc: <BROADCAST,NOARP,UP,LOWER_UP> mtu 2200 qdisc noqueue state UP mode DEFAULT group default qlen 1000 > link/ether 42:d6:51:e6:6b:87 brd ff:ff:ff:ff:ff:ff >[root@localhost ~]# nmcli -g 802-3-ethernet.mtu con show dummy_abc.10 >2000 >
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bug 1751079
: 1613928