I have an Ubuntu 21.10 and I get the below confusing network status related to ppp0; RDS (aka StamAcasa.rdsne) is the name of my network connection providing access to Internet.
Why ppp0 is reported as disconnected by nmcli device but connected by ifconfig? How should I fix this?
$nmcli device DEVICE TYPE STATE CONNECTION eno1 ethernet connected RDS enp2s0 ethernet connected enp2s0 br-4d725814c237 bridge connected br-4d725814c237 br-667e68774f98 bridge connected (externally) br-667e68774f98 docker0 bridge connected (externally) docker0 ppp0 ppp disconnected -- lo loopback unmanaged -- $nmcli device show ppp0 GENERAL.DEVICE: ppp0 GENERAL.TYPE: ppp GENERAL.HWADDR: (unknown) GENERAL.MTU: 1492 GENERAL.STATE: 30 (disconnected) GENERAL.CONNECTION: -- GENERAL.CON-PATH: -- $ip link show | grep -i ppp 5: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1492 qdisc fq_codel state UNKNOWN mode DEFAULT group default qlen 3 link/ppp $ifconfig | grep -A5 ppp ppp0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1492 inet 86.124.169.167 netmask 255.255.255.255 destination 10.0.0.1 ppp txqueuelen 3 (Point-to-Point Protocol) RX packets 64158 bytes 57421437 (57.4 MB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 33280 bytes 13396662 (13.3 MB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 $netstat -r Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface default StamAcasa.rdsne 0.0.0.0 UG 0 0 0 ppp0 StamAcasa.rdsne 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0 link-local 0.0.0.0 255.255.0.0 U 0 0 0 enp2s0 172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0 172.20.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-4d725814c237 172.29.0.0 0.0.0.0 255.255.0.0 U 0 0 0 br-667e68774f98 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 enp2s0 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 enp2s0 192.168.31.0 0.0.0.0 255.255.255.0 U 0 0 0 enp2s0 $ping PING (172.217.19.100) 56(84) bytes of data. 64 bytes from bud02s27-in-f4.1e100.net (172.217.19.100): icmp_seq=1 ttl=59 time=33.3 ms 64 bytes from muc03s07-in-f100.1e100.net (172.217.19.100): icmp_seq=2 ttl=59 time=33.5 ms $lspci | grep -i eth 00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (7) I219-V (rev 10) 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15) 
