Réseaux iproute2

ip

liens de référence

http://irp.nain-t.net/doku.php/100iproute:020_iproute2

https://linux-attitude.fr/post/iproute2

https://www.it-connect.fr/gestion-du-reseau-sous-linux-avec-iproute2/

https://www-npa.lip6.fr/~fourmaux/www-l2ti.univ-paris13.fr/~fourmaux/stages/routeurlinux/iproute2.htm

Affiche les adresses des interfaces

ip -c addr list

ou

ip -c a

Affiche la liste des interfaces

profes@B0:~$ ip -c link list

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

2: enp3s2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000

link/ether d8:eb:97:f3:ad:e6 brd ff:ff:ff:ff:ff:ff

3: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000

link/ether 34:17:eb:b1:94:57 brd ff:ff:ff:ff:ff:ff

profes@B0:~$

neighbor (voisin), ip neigh list, qui affiche la table ARP, un peu à la manière de la commande arp -a :

profes@B0:~$ ip neigh list

172.22.1.1 dev eno1 lladdr 00:1b:2f:2e:d1:ed STALE

172.22.7.1 dev eno1 lladdr 60:36:dd:e7:62:01 REACHABLE

172.22.1.13 dev eno1 lladdr 00:15:99:9b:a0:cc STALE

profes@B0:~$ ping 172.22.1.2

PING 172.22.1.2 (172.22.1.2) 56(84) bytes of data.

64 bytes from 172.22.1.2: icmp_seq=1 ttl=64 time=0.379 ms

64 bytes from 172.22.1.2: icmp_seq=2 ttl=64 time=0.247 ms

^C

--- 172.22.1.2 ping statistics ---

2 packets transmitted, 2 received, 0% packet loss, time 1023ms

rtt min/avg/max/mdev = 0.247/0.313/0.379/0.066 ms

profes@B0:~$ ip neigh list

172.22.1.2 dev eno1 lladdr 10:bf:48:b9:f4:e9 REACHABLE

172.22.1.1 dev eno1 lladdr 00:1b:2f:2e:d1:ed STALE

172.22.7.1 dev eno1 lladdr 60:36:dd:e7:62:01 REACHABLE

172.22.1.13 dev eno1 lladdr 00:15:99:9b:a0:cc STALE

profes@B0:~$

gérer ses voisins

work@bruno-PORTEGE-R930:~$ ip neigh list

172.22.1.1 dev wlp4s0 lladdr 00:1b:2f:2e:d1:ed REACHABLE

172.22.1.13 dev wlp4s0 lladdr 00:15:99:9b:a0:cc STALE

172.22.16.5 dev wlp4s0 lladdr 34:17:eb:b1:94:57 STALE

172.22.2.12 dev wlp4s0 lladdr 00:22:15:95:99:aa STALE

work@bruno-PORTEGE-R930:~$ sudo ip neigh del 172.22.2.12 dev wlp4s0

work@bruno-PORTEGE-R930:~$ ip neigh list

172.22.1.1 dev wlp4s0 lladdr 00:1b:2f:2e:d1:ed REACHABLE

172.22.1.13 dev wlp4s0 lladdr 00:15:99:9b:a0:cc STALE

172.22.16.5 dev wlp4s0 lladdr 34:17:eb:b1:94:57 STALE

work@bruno-PORTEGE-R930:~$

work@bruno-PORTEGE-R930:~$ ip neigh list

172.22.1.1 dev wlp4s0 lladdr 00:1b:2f:2e:d1:ed REACHABLE

172.22.1.13 dev wlp4s0 lladdr 00:15:99:9b:a0:cc STALE

172.22.16.5 dev wlp4s0 lladdr 34:17:eb:b1:94:57 STALE

172.22.2.12 dev wlp4s0 lladdr 00:22:15:95:99:aa STALE

work@bruno-PORTEGE-R930:~$ sudo ip neigh del 172.22.2.12 dev wlp4s0

work@bruno-PORTEGE-R930:~$ ip neigh list

172.22.1.1 dev wlp4s0 lladdr 00:1b:2f:2e:d1:ed DELAY

172.22.1.13 dev wlp4s0 lladdr 00:15:99:9b:a0:cc STALE

172.22.16.5 dev wlp4s0 lladdr 34:17:eb:b1:94:57 STALE

work@bruno-PORTEGE-R930:~$ sudo ip neigh add 172.22.2.12 dev wlp4s0

Error: No link layer address given.

work@bruno-PORTEGE-R930:~$ ip neigh list

172.22.1.1 dev wlp4s0 lladdr 00:1b:2f:2e:d1:ed REACHABLE

172.22.1.13 dev wlp4s0 lladdr 00:15:99:9b:a0:cc STALE

172.22.16.5 dev wlp4s0 lladdr 34:17:eb:b1:94:57 STALE

172.22.2.12 dev wlp4s0 lladdr 00:22:15:95:99:aa STALE

work@bruno-PORTEGE-R930:~$

Flush arp !

work@bruno-PORTEGE-R930:~$ ip neigh list

172.22.1.1 dev wlp4s0 lladdr 00:1b:2f:2e:d1:ed REACHABLE

172.22.1.13 dev wlp4s0 lladdr 00:15:99:9b:a0:cc STALE

172.22.16.5 dev wlp4s0 lladdr 34:17:eb:b1:94:57 STALE

172.22.2.12 dev wlp4s0 lladdr 00:22:15:95:99:aa STALE

work@bruno-PORTEGE-R930:~$ ip neigh flush dev wlp4s0

Failed to send flush request: Operation not permitted

work@bruno-PORTEGE-R930:~$ sudo ip neigh flush dev wlp4s0

work@bruno-PORTEGE-R930:~$ ip neigh list

172.22.1.1 dev wlp4s0 lladdr 00:1b:2f:2e:d1:ed REACHABLE

work@bruno-PORTEGE-R930:~$

Linux 1

guilbert@Linux1:~$ ifconfig

eth2 Link encap:Ethernet HWaddr 00:50:04:6a:a6:ed

inet adr:10.175.102.180 Bcast:10.175.255.255 Masque:255.255.0.0

adr inet6: fe80::250:4ff:fe6a:a6ed/64 Scope:Lien

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

Packets reçus:13183399 erreurs:0 :1 overruns:3 frame:0

TX packets:6552838 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 lg file transmission:1000

Octets reçus:3728506791 (3.7 GB) Octets transmis:571087470 (571.0 MB)

Interruption:18 Adresse de base:0xc000

eth3 Link encap:Ethernet HWaddr 00:1b:2f:2e:d1:ed

inet adr:172.22.1.1 Bcast:172.22.255.255 Masque:255.255.0.0

adr inet6: fe80::21b:2fff:fe2e:d1ed/64 Scope:Lien

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

Packets reçus:6591835 erreurs:0 :0 overruns:0 frame:0

TX packets:12017266 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 lg file transmission:1000

Octets reçus:576549328 (576.5 MB) Octets transmis:3641906480 (3.6 GB)

Interruption:17 Adresse de base:0xe000

lo Link encap:Boucle locale

inet adr:127.0.0.1 Masque:255.0.0.0

adr inet6: ::1/128 Scope:Hôte

UP LOOPBACK RUNNING MTU:16436 Metric:1

Packets reçus:6944 erreurs:0 :0 overruns:0 frame:0

TX packets:6944 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 lg file transmission:0

Octets reçus:588810 (588.8 KB) Octets transmis:588810 (588.8 KB)

guilbert@Linux1:~$

guilbert@Linux1:~$ ip a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

link/ether 00:50:04:6a:a6:ed brd ff:ff:ff:ff:ff:ff

inet 10.175.102.180/16 brd 10.175.255.255 scope global eth2

inet6 fe80::250:4ff:fe6a:a6ed/64 scope link

valid_lft forever preferred_lft forever

3: eth3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

link/ether 00:1b:2f:2e:d1:ed brd ff:ff:ff:ff:ff:ff

inet 172.22.1.1/16 brd 172.22.255.255 scope global eth3

inet6 fe80::21b:2fff:fe2e:d1ed/64 scope link

valid_lft forever preferred_lft forever

guilbert@Linux1:~$

Nettoyer la config réseau

ip addr flush dev enpxxx

Ajouter une adresse

ip addr add dev enpxx ip mask

exemple:

ip addr add dev eno1 192.168.0.4 255.255.255.0

Effacer une ip

ip addr del dev eno1 192.168.0.4 255.255.255.255.0