Root Cause Analysis:

Level 1 engineer caused voice mail outage for half of the network.
Forwarded all voice mail calls to one number.
This effectively DOS’d the one number and resulted in a large prime-time outage
When questioned, the Engineer claimed “I was just seeing what that box did. I wasn’t sure so I just put a phone number in.”

Code Snippet:

!
Voicemail Outage

description Don’t remove the IP from this port or shut it down ###
no ip address
shutdown

!
!
1413 Views // November 23, 2015 // @kyzer_davis
More RCA

More RCA

Close
!

Fire in the Patch-Panel

description Combustible patch paneling needs to be a thing
no lex burned-in-address
no lex retry-count 10
no ip address
no shutdown

!
!
!

Telco Tickets

description Only pipe to telco. Hope it doesn’t go down. We’re too cheap to purchase redundancy.
no ip address
encapsulation hdlc
isdn switch-type primary-4ess
isdn protocol-emulate network
no cdp enable

!
!
!

Cruise Control for Cool

description CAPSLOCK IS A LOT LIKE YELLING ALL THE TIME
no monitor permit-list
monitor event-trace gdoi enable
monitor event-trace ipc enable

!
!
!

Ol’ Rack and Stack Strikes Back

description Part 2, Return of the Revenge
no directions
no ip lookup

!
!
!

CCRA

description Cisco Certified Raccoon Associate
nuff-said

!
!
Comments

Leave a comment!

Close