Ubuntu18.04LTSでネットワークの確認

更新日 2023-07-31 (月) 11:52:39

IP確認

# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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: ens160: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:0c:29:43:31:48 brd ff:ff:ff:ff:ff:ff
3: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:43:31:3e brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.177/24 brd 192.168.0.255 scope global ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe43:313e/64 scope link
       valid_lft forever preferred_lft foreve r

ネットワーク(NIC)の確認

# lshw -short -class network
H/W path           Device      Class       Description
======================================================
/0/100/11/1        ens33       network     82545EM Gigabit Ethernet Controller (
/0/100/15/0        ens160      network     VMXNET3 Ethernet Controller

追加NICにIP設定

変更前

元のNIC

NIC ens33:
IP  192.168.0.177/24
G/W xxx.160.237.178/29 

変更後 元のNIC

NIC ens33:
IP  192.168.0.177/24
経路 10.0.0.0/8
経路G/W 192.168.0.197

追加のNIC

NIC ens160
IP  xxx.160.237.178/29
default GW xxx.160.237.182

設定ファイル

network:
    ethernets:
        ens33:
            addresses:
            - 192.168.0.177/24
            routes:                      ←追加
            - to: 10.0.0.0/8             ←追加
              via: 192.168.0.197         ←追加
            nameservers:
                addresses:
                - 192.168.0.243
                search:
                - ootsuji-c.com
        ens160:                           ←追加
            addresses:                    ←追加
            - xxx.160.237.178/29          ←追加
            gateway4: xxx.160.237.182     ←変更
    version: 2

以下注意

インデントを間違うとSyntaxエラーになる
インデントはスペースがよさそう

設定の有効化

# netplan apply

確認

$ ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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: ens160: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:43:31:48 brd ff:ff:ff:ff:ff:ff
    inet 210.160.237.178/29 brd 210.160.237.183 scope global ens160
    ^^^^^^^^^^^^^^^^^^^^^^^^
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe43:3148/64 scope link
       valid_lft forever preferred_lft forever
3: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:43:31:3e brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.177/24 brd 192.168.0.255 scope global ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe43:313e/64 scope link
       valid_lft forever preferred_lft forever

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