netviewer

A command line utility to display network information.

Information is parsed from the output of the iproute2 ip command with the json option.

netviewer [-d|--detail] <command> [<argument>...]

where command is one of

Using the -d/--detail flags with the interface, bridge, route and link commands displays detailed information.

Items which are up or in an unknown state are shown in green otherwise they are shown as dim green (the loopback interface is in an unknown state but can be used, so unknown states are also shown as green.)

Commands

bridge

Displays information about bridge devices i.e. network devices that have associated veth devices under them.

dump

Dumps the the network information as a json file to the filename passed as an argument.

interface

Displays interface information from the ip address show command. Pass interface names as arguments to display specific interfaces or leave blank to display all interfaces.

route

Displays routing information from the ip route show command.

link

Displays link information from the ip link show command.

JSON input

Using the --input option the network information can be displayed from a static json file.

SVG/HTML Output

Using the --save-svg and --save-html options the output can be sent to a file instead.

This utilises functionality built into rich

Example SVG Output

Examples

Interfaces

For example using the interfaces command

$ netviewer interfaces

in WSL on my machine displays the following information

lo
eth0
bond0
dummy0
sit0
tunl0

Interface

And using the interface command for the lo interface

$ netviewer interface lo

displays the following information

lo:
    index: 1
    type: loopback
    state: unknown
    ipv4:
        scope: host
        ip: 127.0.0.1/8
        preferred lifetime: forever
        valid lifetime: forever
    ipv6:
        scope: host
        ip: ::1/128
        preferred lifetime: forever
        valid lifetime: forever
    flags: LOOPBACK, UP, LOWER_UP
    mtu:
        size: 65536

Link

Running the link command

$ netviewer link bond0

Displays the following

bond0:
    index: 2
    state: down
    type: ether
    address: 96:b5:c9:e7:ed:ff
    broadcast: ff:ff:ff:ff:ff:ff
    flags: BROADCAST, MULTICAST, MASTER
    mtu: 1500
    namespace id: 0
    group: default
    queue type: noop

Link - Detailed Info

Running the link command with the -d/--detail option

$ netviewer -d link bond0

Displays the following

bond0:
    index: 2
    state: down
    type: ether
    address: 96:b5:c9:e7:ed:ff
    broadcast: ff:ff:ff:ff:ff:ff
    flags: BROADCAST, MULTICAST, MASTER
    mtu: 1500
    namespace id: 0
    group: default
    queue type: noop
    link info:
        type: bond
        mode: balance-rr
        miimon: 0
        up delay: 0ms
        down delay: 0ms
        peer notifier delay: 0ms
        use carrier: true (1)
        ARP interval: 0ms
        ARP validate: active
        arp all targets: any
        primary reselect: always
        failover mac: none
        transmit hash policy: layer2
        resend IGMP: 1
        all slaves active: dropped
        minimum links: 0
        lp interval: 1s
        packets per slave: 1
        LACP rate: slow
        LACP aggregation selection logic: stable
        tb mode dynamic shuffling: 1