I’m feeling Seussish again and looking to tackle SDN this time. If you missed my first go it was on Hadoop: Horton Hears Hadoop. Here’s another run:
The app could not flow
Net was too slow to change.
It sat on the server
Waiting on admin for change.
It sat there quite idly
Customers did too
The dev thought, “How I wish
They’d let my app through!”
Too slow to adapt
Too rigid and strict.
The business can’t move.
And that’s my verdict.
So all they could do was to
Sit!
Sit!
Sit!
Sit!
The dev did not like it.
Not one little bit.
And then
Someone spoke UP!
How that speech gave us PUMP!
We listened!
And we heard it move into the hype!
We listened!
A network of SDN type!
The message quite clear,
“You’ve got no need to gripe.”
“I know it is slow
and the network is messy.
There is a fix
With software that’s dressy!”
“I know some good tricks we can use,”
SDN gal said.
“A header or two,”
Said the gal with the plan.
“Controllers as well.
I will show them to you.
Your CTO
Will not mind if I do.”
Then app and dev
Did not know what to say.
The CTO was out playing golf
For the day.
But the net admin said, “No!
Make that gal go away!
"Tell the SDN gal
You do NOT want to play.
She should not be here.
She should not be about.
She should not be here
When the CTO is out!”
“Now! Now! Have no fear.
Have no fear!” Said the gal.
“My tricks are not bad,”
Said the SDN gal.
“Why you’ll have
So many options from me,
With some tricks that I call
Virtualization you see!”
“Stop this nonsense!” admin said.
“We don’t need to scale!
Stop this nonsense!” Admin said.
“The net cannot fail!”
“Have no fear!” said the gal.
“I will not let net fail.
I will make it dynamic
And people will hail.
Its changes are quick!
It grows very fast!
But there is much more it can do!”
“Look at it!
Look at it now said the gal.”
“With a new overlay
And control from a pal!
It can adapt very fast!
It’s managed quite nicely!
The scale is much greater!
And admin less dicey!
And look!
You can change flows from here!
But there is more dear!
Oh, no.
There is more dear…
“Look at it!
Look at it!
Look at it now!
It’s better you see
But you have to know how.
How it can adapt
And respond to new apps!
How it grows to scale!
And helps those dev chaps!
Can grow past those VLANs
And direct traffic, see!
We wrap Layer two
In Layer three IP!
And we route the IP!
As we grow big from small!
But that is not all.
Oh, no.
That is not all….”
That’s what the gal said…
Then the net went dead!
The apps all went down
From out at the NOC.
The developers,
Watched with eyes open in shock!
And the admin cried out.
With a loud angry shot!
He said, “Do I like this?
Oh no! I do not.
This is not a good trick,”
Said the admin with grit.
“no I don’t like it,
Not one little bit!”
“Now look what you did!”
Said admin to gal.
“Now look at this net!
Look at this mess now pal!
You brought down the apps,
Crashed services too
You cost us some sales
And caused lost revenue.
You SHOULD NOT be here
When the CTOs not.
Get out of the data center!”
Admin said from his spot.
“But I like to be here.
Oh, I like it a lot”
Said the SDN girl
To the admin she shot.
“I will not go away.
I do not wish to go!
And so,” said the SDN girl,
“So
So
So…
I will show you
Another good trick that I know!”
And then she ran out.
And, then fast as a fox,
The SDN gal
Came back with a box.
A big green wood box.
It was shut with a hook.
“Now look at this trick,”
Said the gal.
“Take a look!”
Then she got up on top
And with no rationale.
“I call this game SDN-IN-A-BOX,”
Said the gal.
“In this box are four things
I will show to you now.
You will like these four things.”
Said the gal with a bow.
“I will pick up the hook.
You will see something new.
Four things. And I call them
The SDN glue.
These things will not harm you.
They want to move frames.”
Then, out of the box
Came her SDN claims!
And they came out quite fast.
They said, “Are you ready?
Now should we get started
Let’s get going already!”
The devs and the apps
Did not know what to do.
So they sat and they watched
Watched the SDN glue.
They stood in their shock
But the admin said “No!
Those things should not be
On this net! Make them go!”
“They should not be here
When the CTOs not!
Put them out! Put them out!”
Admin yelled with a shot.
“Have no fear, Mr. admin,”
Said the SDN gal.
“These things are good things
And good for morale.”
“They’re great. Oh so great!
They have come to fix things.
They will give back control
To the network today.”
“The first is an overlay,
Number two a vSwitch
But that’s only halfway.”
Was the gals latest pitch.
“We’ll next need control
For the flows as they go.
Something to manage
Those flows as they flow.
But there’s still one more piece
Of this SDN madness.
Device management system
To avoid admin sadness.”
Then the SDN gal
Said with conviction
“We aren’t quite done yet
There’s one more restriction.
We must tie these together
In a cohesive fashion,
If we do not
It’s all stormy weather.
We will organize things
With apps at the center
And let those developers
For once spread their wings.”
“You see in the past,”
Said the SDN gal.
“The net was restrictive
the apps were in hell.
Now we change things around
Put the apps back in focus.
Using these tricks,
And some good hocus pocus.
With a sprinkle of tears
From the unicorn clan,
And a dash of fine dust
A pixie put in this can.
We’ll accomplish the task.”
SDN gal said as she drank from her flask.
And lo and behold,
The network sprang back.
The packets were flowing,
TCP sent it’s ACK.
The admin stood shocked,
As he used the controller.
With this type of thing,
He would be the high roller!
He gaped in amazement
At the tenancy scale.
No longer 4000,
It was net holy grail.
The apps back online,
As CTO entered.
A disaster avoided, he was left with no sign.
Of the mess that had happened,
While he was out and about.
But the faint sound of snoring
SDN girl drunk and passed out.
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