Time Constants
Packet Tracer 4.11 uses the following time constants:
RIP default update | 30 sec |
RIP default timeout | 3 min |
RIP default flush timeout | 4 min |
RIP default hold-down | 3 min |
MAC table entry timeout | 5 min |
ARP request timer | 2 sec |
ARP table entry timeout | 4 hrs |
CDP update timer | 1 min |
CDP neighbor hold-down timer | 3 min |
DHCP client timeout | 5 sec |
CSMA/CD waiting time to resend | random |
LMI timeout | 15 sec |
LMI signaling | 5 sec |
Inverse ARP | 30 sec |
HDLC keepalive | 5 sec |
HDLC timeout | 15 sec |
NAT entries timeout | Depends on the encapsulation protocol |
NAT entry encapsulated in a UDP | 5 min |
NAT entry encapsulated in a TCP | 24 hrs |
NAT entry encapsulated in a IC | 1 min |
CHAP timeout | 5 sec |
CHAP re-authenticate timeout | 10 sec |
DIALING no answer timeout | 5 sec |
DIALING no dial tone timeout | 2 sec |
PPP keepalive interval | 5 sec |
Timeout | 15 sec |
EIGRP Hello time interval period | 5 sec |
EIGRP Hold time interval period | 15 sec |
ICMP | 1 ms |
STP Max Age | 20 sec |
STP Hello | 2 sec |
STP Forward Delay | 15 sec |
STP Topology Change Notify Timer | 2 sec |
STP Topology Change Timer | 35 sec |
OSPF SPF Hold Time | 10 sec |
OSPF LS Refresh Time | 30 min |
OSPF SPF Delay Timer | 5 sec |
OSPF LSA Retransmission Time | 5 sec |
OSPF minimum LSA Arrival Time | 1 sec |
OSPF Delayed Acknowledgment Timer | 2.5 sec |
OSPF Dead Interval | 40 sec |
OSPF Hello | 10 sec |
OSPF Wait Interval | 40 sec |
TCP Connection Timeout | 60 sec |
TCP Retransmission Timeout | 0.1 sec |
TCP Inactivity Timeout | 5 min |
TCP Close Timeout | 10 sec |
DNS Request Timeout | 3 sec |
DHCP Timeout | 5 sec |
DHCP Discovery Timeout | 55 sec |
DTP Hello | 30 sec |
DTP Timeout | 5 min |
Password Timeout | 30 sec |