eigrp hello/hold timers...

play with these at your own peril...

dls1(config-if)#do sh ip eigrp int det f0/24
EIGRP-IPv4:(1) interfaces for process 1

                        Xmit Queue   Mean   Pacing Time   Multicast    Pending
Interface        Peers  Un/Reliable  SRTT   Un/Reliable   Flow Timer   Routes
Fa0/24             0        0/0         0       0/1            0           0
  Hello interval is 5 sec
  Next xmit serial
  Un/reliable mcasts: 0/0  Un/reliable ucasts: 0/0
  Mcast exceptions: 0  CR packets: 0  ACKs suppressed: 0
  Retransmissions sent: 0  Out-of-sequence rcvd: 0
  Topology-ids on interface - 0
  Authentication mode is not set
dls1(config-if)#ip hello-interval eigrp 1 3
dls1(config-if)#do sh ip eigrp int det f0/24
EIGRP-IPv4:(1) interfaces for process 1

                        Xmit Queue   Mean   Pacing Time   Multicast    Pending
Interface        Peers  Un/Reliable  SRTT   Un/Reliable   Flow Timer   Routes
Fa0/24             0        0/0         0       0/1            0           0
  Hello interval is 3 sec
  Next xmit serial
  Un/reliable mcasts: 0/0  Un/reliable ucasts: 0/0
  Mcast exceptions: 0  CR packets: 0  ACKs suppressed: 0
  Retransmissions sent: 0  Out-of-sequence rcvd: 0
  Topology-ids on interface - 0
  Authentication mode is not set
dls1(config-if)#

you can see it using show run as well...

as with stp, the timers are set as the default for a variety of good reasons... you are not smarter than the default values...