infix/doc/cli.md

CLI User Guide

• Introduction
• Admin Exec
• Configure Context
  • Set IP Address on an Interface
  • Creating a VETH pair
  • Creating a Bridge
  • Saving Changes

Introduction

The Infix CLI is built on the klish project, which is a framework for implementing a CISCO, or Juniper Networks JunOS-like CLI on a UNIX system.

Currently, when the admin user logs in the default shell is Bash. To access the CLI, type:

cli

Key commands available in any context are:

help
show

For each command it is also possible to press the ? key and TAB to get more help and suggestions for completion.

Admin Exec

The top-level context after logging in and starting the CLI is the admin-exec or "main" context. It is used for querying system status, managing configuration files/profiles and doing advanced debugging.

Available commands can be seen by pressing ? at the prompt:

root@infix-12-34-56:exec> 
  configure  Create new candidate-config based on running-config
  copy       Copy
  exit       Exit
  logout     Alias for exit
  shell      Enter system shell
  show       Show

Configure Context

Enter the configure context from admin-exec by typing configure followed by Enter. Available commands, press ? at the prompt:

root@infix-12-34-56:configure> 
  abort     Abandon candidate
  check     Validate candidate
  commit    Commit current candidate to running-config
  delete    Delete configuration setting(s)
  diff      Summarize uncommitted changes
  do        Execute operational mode command
  edit      Descend to the specified configuration node
  exit      Ascend to the parent configuration node, or abort (from top)
  leave     Finalize candidate and apply to running-config
  no        Alias for delete
  rollback  Restore candidate to running-config
  set       Set configuration setting
  show      Show configuration
  top       Ascend to the configuration root
  up        Ascend to the parent configuration node
[edit]

The edit command lets you change to a sub-configure context, e.g.:

root@infix-12-34-56:configure> edit interfaces interface eth0 
[edit interfaces interface eth0]

Notice the [edit ...] displayed, it shows your current location. Use up to go back to the previous context.

root@infix-12-34-56:configure> up
[edit]

Set IP Address on an Interface

root@infix-12-34-56:configure> 
[edit]
root@infix-12-34-56:configure> edit interfaces interface eth0 
[edit interfaces interface eth0]
root@infix-12-34-56:configure> set ipv4 address 192.168.2.200 prefix-length 24
[edit interfaces interface eth0]

From anywhere in configure context you can see the changes you have made by typing diff:

root@infix-12-34-56:configure> diff
interfaces {
  interface eth0 {
+    ipv4 {
+      address 192.168.2.200 {
+        prefix-length 24;
+      }
+    }
  }
}

Creating a VETH Pair

The following example creates a veth0a <--> veth0b virtual Ethernet pair which is useful for connecting, e.g., a container to the physical world. Here we also add an IPv4 address to one end of the pair.

root@infix-12-34-56:configure>
[edit]
root@infix-12-34-56:configure> edit interfaces interface veth0a
[edit interfaces interface veth0a]
root@infix-12-34-56:configure> set veth peer veth0b
[edit interfaces interface veth0a]
root@infix-12-34-56:configure> set ipv4 address 192.168.0.1 prefix-length 24
[edit interfaces interface veth0a]
root@infix-12-34-56:configure> leave

See the bridging example below for more.

Note: in the CLI you do not have to create the veth0b interface. The system infers this for you. When setting up a VETH pair using NETCONF, however, you must include the veth0b interface.

Creating a Bridge

Here we create a non-VLAN filtering bridge that forwards any, normally link-local, LLDP traffic.

root@infix-12-34-56:exec> configure
[edit]
root@infix-12-34-56:configure> edit interfaces interface br0
[edit interfaces interface br0]
root@infix-12-34-56:configure> set bridge ieee-group-forward lldp
[edit interfaces interface br0]
root@infix-12-34-56:configure> up
[edit interfaces]
root@infix-12-34-56:configure> set interface eth0 bridge-port bridge br0
[edit interfaces]
root@infix-12-34-56:configure> set interface veth0b bridge-port bridge br0
[edit interfaces]
root@infix-12-34-56:configure> leave

Both a physical port eth0 and a virtual port veth0b (bridge side of the VETH pair from the previous example) are now bridged. Any traffic ingressing one port will egress the other. Only reserved IEEE multicast is filtered, except LLDP frames as shown above.

Saving Changes

Apply the changes (from candidate to running):

root@infix-12-34-56:configure> leave
root@infix-12-34-56:exec> show running-config 
interfaces {
  interface eth0 {
    type ethernetCsmacd;
    ipv4 {
      address 192.168.2.200 {
        prefix-length 24;
      }
    }
  }

Since we did not get any warnings we can save the running (RAM only) configuration to startup, so the changes are made persistent across reboots:

root@infix-12-34-56:exec> copy running-config startup-config 

Note: most (all) commands need to be spelled out, no short forms are allowed at the moment. Use the TAB key to make this easier.