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[from nanog] The End of Empire

Stefan `Sec` Zehl - Fri Aug 17 10:40:19 2001

Darth Vader took two giant strides toward the immense visiscreen that
occupied the forward wall of the bridge of his flagship Imperial star
destroyer.  "We've got them now," he rumbled.  Whirling on the
technicians cowering at their consoles, Vader snapped, "Tractor beam!"

"Yes, Lord Vader," replied one, bending attentively to his task.  Then
he looked up hesitantly.

Vader gestured dramatically at the screen, indicating the fleeing
spacecraft.  "I want a tractor beam on that ship," he declared. "Now!"
The technician busied himself with switches and dials.

"Where's that tractor beam?" roared Vader, his voice dark with menace.
The other technicians turned frightened eyes on their peer.  They knew what
happened when Darth Vader's instructions weren't executed instantly.

"The tractor beam seems to be down, sir," quavered the technician.

"What do you mean down?" Vader inquired with a disturbing silkiness to
his voice.

"It's not accepting commands, sir," the technician explained.  Another
technician leaned over and examined the console.  "That's odd. The beam
itself is showing green," he pointed out.

"Yes, I know," agreed the first.

"But I'm not getting any acknowledgment to my 'Engage' command." He
pressed a button several times to demonstrate.

"Maybe the network's down again," suggested a third technician.

"Oh, that could be," admitted the first technician.  "The network
might be down, Lord Vader," he informed the large black figure trembling
with rage.

"What network?" Vader asked ominously.

The second technician jumped in.  "Since we've moved to a distributed
architecture on the Imperial star destroyers, everything is on a network.
It was felt that the direct connections were too unreliable."

The third technician added. "The tractor beam is on one of the
peripherals sub networks, with the printers and the scanners. It's not on
the main weapons network."

"Why isn't the tractor beam on the weapons network?" asked Vader, now
more puzzled than angry.

The technicians exchanged sheepish looks. It was embarrassing to have
to point out something so obvious to a superior. The second technician
cleared his throat. "Well, sir, the weapons network is a higher priority.
It makes more sense to put the less commonly used systems on a separate
sub network that has lower QOS."

"QOS?" Vader queried.

"Hang on a second," said the first technician. "If the network is down,
how come we're getting a green light for the tractor beam?"

The third technician brightened. "Ah! Maybe the console is retrieving
old MIB data and displaying that."

"MIB?" rumbled Vader.

The first technician answered "We use SNMP to monitor the network
elements. When the server queries the element, it stores its current status.
If the network goes down, it can't query the element anymore, and all
you have is the latest status in the MIB." He turned to the other
technicians, musing.

"We really should have an indicator of when the last successful query was,
instead of just a green or red light."

"Good idea," said the third technician. "I'll call tech support."

"Say," said the second technician. "How about if we ping the tractor
beam? ...  Let me bring up a telnet window."

"Telnet?" asked Vader, now obviously confused. "Ping?"

The first technician glanced briefly at Vader, a little annoyed at the
interruptions. Why couldn't this guy keep up with the service bulletins?
"The system runs Unix, but the consoles run NT 5000," he replied with
exaggerated patience. "You need a telnet window to ping the element."
He turned his attention back to the screen. "That's strange. It comes back
'active'. Listen, when you get tech support tell them we can't engage
the tractor but we can ping it."

"Right," said the third technician. "I'm still on hold."

"Here's a thought," said the second technician. "What if we just call
the guys down at tractor control and have them engage the beam manually?"
Vader seemed to brighten up at this, and swiveled his head from one to
another.

"Good idea," said the first technician. He lifted his communicator and
tapped the switch several times.  "Nothing," he said.

The second technician shook his head. "Didn't we tell them we couldn't
do voice and data with that little bandwidth?"

Suddenly Vader noticed the visiscreen and let out a bellow of anger.
"They're gone!" he boomed.

The third technician looked up smiling. "Hey, I got tech support!"


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