Estou executando o Tumbleweed do OpenSuse com o gnome 3.22 .
Eu preciso definir meu MTU para 1472. Se eu fizer isso com:
ip link set mtu 1472 dev ppp0
funciona:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 88:ae:1d:59:7c:1a brd ff:ff:ff:ff:ff:ff
inet6 fe80::2c7:1e3d:2a85:7a43/64 scope link
valid_lft forever preferred_lft forever
3: wlp6s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 5a:37:1f:84:93:99 brd ff:ff:ff:ff:ff:ff
16: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1472 qdisc pfifo_fast state UNKNOWN group default qlen 3
link/ppp
inet 31.176.245.43 peer 109.175.48.1/32 scope global ppp0
valid_lft forever preferred_lft forever
Mas assim que eu abro o NetworkManager e reinicio a conexão estou de volta a 1500 ...
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 88:ae:1d:59:7c:1a brd ff:ff:ff:ff:ff:ff
inet6 fe80::2c7:1e3d:2a85:7a43/64 scope link
valid_lft forever preferred_lft forever
3: wlp6s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 5a:37:1f:84:93:99 brd ff:ff:ff:ff:ff:ff
17: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 3
link/ppp
inet 92.36.220.222 peer 109.175.48.1/32 scope global ppp0
valid_lft forever preferred_lft forever
Eu também tentei editar o arquivo /etc/ppp/options
sem sucesso.
Configurar o MTU a partir da GUI do NetworkManager também não funciona.