minimum configure time of ospf hello packet intervals

I am doing cisco 360 nmc lab igp lesson 1, section 1.10, this is what it
asks

1.10 tuning ospf timers using subsecond timers

- hello packets should be sent every 250 ms on vlan 30

- hello packets should be considered valid for the minimum configurable time
on vlan 30

but then the answer key says that this is the correct command :

ip ospf dead-interval minimal hello-multiplier 4

However...

R3(config-if)#ip ospf dead-interval minimal hello-multiplier ?
  <3-20> Number of Hellos sent within 1 second

If the question is asking me to configure the minimum configurable time,
wouldn't

ip ospf dead-interval minimal hello-multiplier 20

be the correct command ?

thanks

scuba

Blogs and organic groups at http://www.ccie.net
Received on Mon Nov 09 2009 - 09:39:55 ART