This is a special blog series called "RARE Day One". I've always been a huge Cisco and JUNIPER fans, Cisco has unparalleled documentation and I really like JUNIPER "Day One" or "This Week" booklets. Similar to JUNIPER approach RARE "Day One" articles are dealing with essential topics that you need to get familiar with and that will become handy during your "RARE-freeRouter"-FU practices !

Requirement

Basic Linux/Unix knowledge
Service provider networking knowledge

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Overview

Even in the era of zero touch configuration where everything can be modelled by YANG and automated by Ansible, CLI configuration mode is essential and will take a special important place into network engineers' heart.

...

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title	configure file

"configure file" gives you to the possibility to update/merge running configuration from a local file from the flash filesystem.

Code Block

language	bash
theme	Midnight
title	route addition via freeRouter

r1#configure file ?                                                       
  <file> - source file

r1#configure file
...

This command take a <file> as argument. Basically it will load specified configuration from the specified <file> and update/merge the running-config. It is an equivalent to Cisco "copy <flash:file> run". So, from that point:

Code Block

language	bash
theme	Midnight
title	show flash

mjolnir#show flash /rtr                                                        
date                 size     name
2009-12-31 23:00:00  18048    bundle.bin
2020-07-30 15:47:05  2477     c.sh
2009-12-31 23:00:00  22648    hdlcInt.bin
2020-08-26 07:35:35  2937     hwdet-all.sh
2020-07-31 13:31:28  203      hwdet-main.sh
2009-12-31 23:00:00  18616    mapInt.bin
2020-09-29 08:58:48  554856   mjolnir.log
2009-12-31 23:00:00  18088    modem.bin
2009-12-31 23:00:00  131432   p4dpdk.bin
2009-12-31 23:00:00  121896   p4emu.bin
2009-12-31 23:00:00  63144    p4pkt.bin
2009-12-31 23:00:00  18088    pcap2pcap.bin
2009-12-31 23:00:00  18608    pcapInt.bin
2009-12-31 23:00:00  18384    rawInt.bin
2020-09-28 11:54:12  598      rtr-hw.txt
2020-09-28 21:16:19  14607    rtr-sw.txt
2020-07-30 15:47:37  2022     rtr.err
2020-09-29 03:09:25  5587321  rtr.jar
2020-09-29 03:09:16  5585713  rtr.jar.bak
2020-09-29 03:09:26  24       rtr.rld
2020-09-23 03:06:12  529      rtr.scr
2020-09-23 03:06:11  483      rtr.scr.bak
2020-08-23 17:34:19  46       rtr.scr2
2020-08-23 17:34:18  0        rtr.scr2.bak
2020-09-23 03:06:11  542720   rtr.tar
2020-09-23 03:06:09  522240   rtr.tar.bak
2020-09-29 03:11:04  2330     rtr.ver
2020-09-29 03:11:03  3790694  rtr.zip
2020-09-29 03:10:57  3789659  rtr.zip.bak
2020-07-30 15:47:05  388      setup_dpdk.sh
2020-07-30 15:47:05  48       setup_route.sh
2020-07-30 15:47:05  2171     setup_veth.sh
2009-12-31 23:00:00  18048    stdLin.bin
2009-12-31 23:00:00  18440    tapInt.bin
2009-12-31 23:00:00  18224    ttyLin.bin
2009-12-31 23:00:00  18256    vlan.bin

Expand

title	configure filereplace

"configure file" gives you to the possibility to replace running configuration from a local file from the flash filesystem.

Code Block

language	bash
theme	Midnight
title	route addition via freeRouter

r1#configure replace ?                                                       
  <file> - source file

r1#configure replace
...

This command take a <file> as argument. Basically it will load specified configuration from the specified <file> and replace the running-config. It is an equivalent to Cisco "copy <flash:file> run". So, from that point:

Code Block

language	bash
theme	Midnight
title	show flash

mjolnir#show flash /rtr                                                        
date                 size     name
2009-12-31 23:00:00  18048    bundle.bin
2020-07-30 15:47:05  2477     c.sh
2009-12-31 23:00:00  22648    hdlcInt.bin
2020-08-26 07:35:35  2937     hwdet-all.sh
2020-07-31 13:31:28  203      hwdet-main.sh
2009-12-31 23:00:00  18616    mapInt.bin
2020-09-29 08:58:48  554856   mjolnir.log
2009-12-31 23:00:00  18088    modem.bin
2009-12-31 23:00:00  131432   p4dpdk.bin
2009-12-31 23:00:00  121896   p4emu.bin
2009-12-31 23:00:00  63144    p4pkt.bin
2009-12-31 23:00:00  18088    pcap2pcap.bin
2009-12-31 23:00:00  18608    pcapInt.bin
2009-12-31 23:00:00  18384    rawInt.bin
2020-09-28 11:54:12  598      rtr-hw.txt
2020-09-28 21:16:19  14607    rtr-sw.txt
2020-07-30 15:47:37  2022     rtr.err
2020-09-29 03:09:25  5587321  rtr.jar
2020-09-29 03:09:16  5585713  rtr.jar.bak
2020-09-29 03:09:26  24       rtr.rld
2020-09-23 03:06:12  529      rtr.scr
2020-09-23 03:06:11  483      rtr.scr.bak
2020-08-23 17:34:19  46       rtr.scr2
2020-08-23 17:34:18  0        rtr.scr2.bak
2020-09-23 03:06:11  542720   rtr.tar
2020-09-23 03:06:09  522240   rtr.tar.bak
2020-09-29 03:11:04  2330     rtr.ver
2020-09-29 03:11:03  3790694  rtr.zip
2020-09-29 03:10:57  3789659  rtr.zip.bak
2020-07-30 15:47:05  388      setup_dpdk.sh
2020-07-30 15:47:05  48       setup_route.sh
2020-07-30 15:47:05  2171     setup_veth.sh
2009-12-31 23:00:00  18048    stdLin.bin
2009-12-31 23:00:00  18440    tapInt.bin
2009-12-31 23:00:00  18224    ttyLin.bin
2009-12-31 23:00:00  18256    vlan.bin

...

Tip

title	Final words

All these modes are not new. IOS, IOS-XR, IOX-XE, NW-OX, JUNOS have their own config mode that are somewhat similar. In any case freeRouter config mode implementation is meant to address all needs from the network operators perspective. As you can observe, configure mode has an impressive list of mode. Feel free to try and use them according to your environment taste!

Last but not least, you can play with these different mode from this sandbox:

Code Block

language	bash
theme	Midnight
title	type "telnet dl.nop.hu" in a terminal and choose "1"

 telnet dl.nop.hu                                                                                                                                                 1 ↵
Trying 193.224.23.5...
Connected to dl.nop.hu.
Escape character is '^]'.
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXX XXXXX XXX    XXX     XXX XX XX XXXX XXXXXXXXXXXXXXXXXXX
XXXX  XXXX XX XXXX XX XXXX XX XX XX XXXX XXXXX/~~~~~~\XXXXXX
XXXX X XXX XX XXXX XX XXXX XX XX XX XXXX XXXX| player |XXXXX
XXXX XX XX XX XXXX XX     XXX    XX XXXX XXXXX\______/XXXXXX
XXXX XXX X XX XXXX XX XXXXXXX XX XX XXXX XXXXXXXXXXXXXXXXXXX
XXXX XXXX  XX XXXX XX XXXXXXX XX XX XXXX XXXXXXXXXXXXXXXXXXX
XXXX XXXXX XXX    XXX XXX XXX XX XXX    XXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
welcome
line ready
menu lab:
...

Code Block

language	bash
theme	Midnight
title	type "ssh dl.nop.hu" in a terminal (any user/pass will do) and choose "1"

ssh dl.nop.hu -l random_user                                                                                                                                     1 ↵
Warning: Permanently added 'dl.nop.hu,193.224.23.5' (RSA) to the list of known hosts.
random_user@dl.nop.hu's password: 
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXX XXXXX XXX    XXX     XXX XX XX XXXX XXXXXXXXXXXXXXXXXXX
XXXX  XXXX XX XXXX XX XXXX XX XX XX XXXX XXXXX/~~~~~~\XXXXXX
XXXX X XXX XX XXXX XX XXXX XX XX XX XXXX XXXX| player |XXXXX
XXXX XX XX XX XXXX XX     XXX    XX XXXX XXXXX\______/XXXXXX
XXXX XXX X XX XXXX XX XXXXXXX XX XX XXXX XXXXXXXXXXXXXXXXXXX
XXXX XXXX  XX XXXX XX XXXXXXX XX XX XXXX XXXXXXXXXXXXXXXXXXX
XXXX XXXXX XXX    XXX XXX XXX XX XXX    XXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
welcome
line ready
menu lab:
# - reboot router1
$ - reboot router2
% - reboot router3
1 - connect to router1
2 - connect to router2
3 - connect to router3
^ - rebuild routers
l - connect to lg.nop.dn42
x - exit
choose:1 - attach vdc lab1 

yourname#                                                                      
yourname#configure ?                                                           
  <cr>
  banner            - edit the banner
  editor            - configure from editor
  file              - append to running configuration
  network           - append to running configuration
  overwrite-network - overwrite the running configuration
  reapply           - !!!EXPERiMENTAL!!! try to reapply current configuration
  reload            - overwrite the startup configuration
  replace           - overwrite the running configuration
  revert            - revert to startup configuration
  rollback          - configure within auto-revert session
  startup           - edit the startup configuration
  terminal          - configure from this terminal
  viewer            - view current configuration

yourname#configure                                      
...

In order to exit the sandbox session use the following escape sequence: Ctrl-c + Ctrl-x

Another method to access the sandbox, by click here, this will open a terminal webapp into your browser:

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