First JUNOS logical topology

On May 13, 2012, in CCIE, Juniper, by Darren

Following on from my last post, I wanted to put together a small lab for me to start with inside my M10. As a reminder the extremely simple topology looks like so:
Juniper Physical First JUNOS logical topology

The plan is to make a simple lab like so:
First Junos First JUNOS logical topology

This should give me something to start with. I can always add more to make things a lot more complicated. Below I’ll paste my config which also includes IP addressing for the links and loopbacks:

set interfaces fe-0/0/0 vlan-tagging
set interfaces fe-0/0/1 vlan-tagging
set logical-systems J1 interfaces fe-0/0/0 unit 15 vlan-id 15
set logical-systems J1 interfaces fe-0/0/0 unit 15 family inet address 10.15.15.1/24
set logical-systems J1 interfaces fe-0/0/0 unit 121 vlan-id 121
set logical-systems J1 interfaces fe-0/0/0 unit 121 family inet address 10.12.12.1/24
set logical-systems J1 interfaces fe-0/0/0 unit 122 vlan-id 122
set logical-systems J1 interfaces fe-0/0/0 unit 122 family inet address 10.21.21.1/24
set logical-systems J1 interfaces lo0 unit 1 family inet address 1.1.1.1/32
set logical-systems J2 interfaces fe-0/0/1 unit 25 vlan-id 25
set logical-systems J2 interfaces fe-0/0/1 unit 25 family inet address 10.25.25.2/24
set logical-systems J2 interfaces fe-0/0/1 unit 121 vlan-id 121
set logical-systems J2 interfaces fe-0/0/1 unit 121 family inet address 10.12.12.2/24
set logical-systems J2 interfaces fe-0/0/1 unit 122 vlan-id 122
set logical-systems J2 interfaces fe-0/0/1 unit 122 family inet address 10.21.21.2/24
set logical-systems J2 interfaces lo0 unit 2 family inet address 2.2.2.2/32
set logical-systems J3 interfaces fe-0/0/0 unit 35 vlan-id 35
set logical-systems J3 interfaces fe-0/0/0 unit 35 family inet address 10.35.35.3/24
set logical-systems J3 interfaces fe-0/0/1 unit 34 vlan-id 34
set logical-systems J3 interfaces fe-0/0/1 unit 34 family inet address 10.34.34.4/24
set logical-systems J3 interfaces lo0 unit 3 family inet address 3.3.3.3/32
set logical-systems J4 interfaces fe-0/0/0 unit 34 vlan-id 34
set logical-systems J4 interfaces fe-0/0/0 unit 34 family inet address 10.34.34.4/24
set logical-systems J4 interfaces fe-0/0/1 unit 45 vlan-id 45
set logical-systems J4 interfaces fe-0/0/1 unit 45 family inet address 10.45.45.4/24
set logical-systems J4 interfaces lo0 unit 4 family inet address 4.4.4.4/32
set logical-systems J5 interfaces fe-0/0/0 unit 25 vlan-id 25
set logical-systems J5 interfaces fe-0/0/0 unit 25 family inet address 10.25.25.5/24
set logical-systems J5 interfaces fe-0/0/0 unit 45 vlan-id 45
set logical-systems J5 interfaces fe-0/0/0 unit 45 family inet address 10.45.45.5/24
set logical-systems J5 interfaces fe-0/0/1 unit 15 vlan-id 15
set logical-systems J5 interfaces fe-0/0/1 unit 15 family inet address 10.15.15.5/24
set logical-systems J5 interfaces fe-0/0/1 unit 35 vlan-id 35
set logical-systems J5 interfaces fe-0/0/1 unit 35 family inet address 10.35.35.5/24
set logical-systems J5 interfaces lo0 unit 5 family inet address 5.5.5.5/32

All tested and working so feel free to use the configuration yourself

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9 Responses to “First JUNOS logical topology”

  1. Mr_X says:

    Hi,

    Would it be possible to have J5 to act like a MPLS P router and the others as PE?

    I would like to delete the J1 J2 and J3 J4 links and add and extra CE to each device.

    Would this allow L2VPN / L3VPN / VPLS labs? Or would this need separate physical ports because ethernet-ccc can’t be done if done on one port?

    Maybe you can post more topologies like this :) Would be great!

  2. Darren says:

    Hi Mr X.

    Good question, I don’t know yet. I would think it would work though :)

    Watch this space for the next couple of week. I might try and replicate my IOS MPLS topology inside this box. Would be even better if I can get ym second M10 working so I can have a ton of routers!

  3. Jason says:

    so did you only buy 1 m10? and are able to recreate your entire lab? what did a m10 cost? just curious as im starting to get introduced to junos and want some practice

    thanks

  4. Darren says:

    Thankfully I didn’t need to buy it. These are our very old edge routers that were sitting collecting dust until I got my hands on it :) I still need to try and get the second one working though

  5. Jason says:

    always music to my ears network refresh

  6. Darren says:

    Indeed. The plan is to use my current M7is in my lab. I just need to replace them…

  7. Mr_X says:

    “Would be even better if I can get ym second M10 working so I can have a ton of routers!”

    Well, you can only have 15 (or 16?) active logical systems at a certain time.

    But you can always have different (or easily switch between) topologies by (de)activating the necessary logical systems!

  8. Calin C. says:

    Darren you are having great posts (like the above one) and I would like to share your articles, but please add a Twitter button :)

    I would be much more easier than to copy / past link and title.

    Thanks!

  9. Darren says:

    Hi Calin.

    Thanks for the suggestion! I’ve now added a tweet button :D

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