From: Cielieska Nathan (ncielieska@gmail.com)
Date: Mon Jan 14 2008 - 18:01:18 ARST
All,
I have been working through the Command Reference for RIP today and
ran into this command. The way i'm reading it (disclaimer) is that
when a router running rip v2 unequivocally knows that an advertised
route is down... or has been added, it shoots a flash update across
to its neighbor notifying them as such thus allowing for faster
update time. Thats how i understand it to work.
Now the flash-update-threshold has a second value that compares
itself with the incoming regular 30 second update. You can suppress
an outgoing flash update by configuring this command with a seconds
value that will match that 30 second timer.
If the timer is greater than the threshold value: flash update is
sent. If the update packet is within the timer,flash update is
suppressed.
For instance:
On the receiving end of a route change or event
router rip
flash-update-threshold 20
When a flash-update came into the router on a particular interface,
the value in the show ip protocols would be referenced.. if its above
20 the flash update is sent, if its under 20.. its suppressed.
Is this correct? Cant find a ton of documentation on the command. I
labbed it up and if i remove/add a network command from R1 it shoots
the flash update to R2. R2 flash-update-threshold 30 configured which
would allow all flash updates to be suppressed. Yet in "debug ip rip"
i still see flash updates being sent out my other interfaces on R2.
Any help would be great.
Regards,
Nate
This archive was generated by hypermail 2.1.4 : Fri Feb 01 2008 - 10:37:59 ARST