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PacketTracer / opt / pt / help / default / timeConstants.htm
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<p class="MainHeading1"> Time Constants</p></div>
<hr>
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<P> Packet Tracer uses the following time constants:</P>
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<table class="tableModules">
  <tr>
    <td width="240" class="TDpadded">RIP/RIPv6 default update </td>
    <td class="TDpadded"><p class="myList">30 secs</p></td>
  </tr>
  <tr >
    <td class="TDpadded">RIP/RIPv6 default timeout </td>
    <td class="TDpadded"><p class="myList"> 3 mins</p></td>
  </tr>
  <tr >
    <td class="TDpadded">RIP/RIPv6 default flush timeout</td>
    <td class="TDpadded">4 mins</td>
  </tr>
  <tr >
    <td class="TDpadded">RIP/RIPv6 default hold-down</td>
    <td class="TDpadded">3 mins</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">MAC table entry timeout</td>
    <td class="TDpadded">5 mins</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">ARP request timer</td>
    <td class="TDpadded">2 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">ARP table entry timeout</td>
    <td class="TDpadded">4 hrs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">CDP update timer</td>
    <td class="TDpadded">1 min</td>
  </tr>
  <tr >
    <td class="TDpadded">CDP neighbor hold-down timer</td>
    <td class="TDpadded">3 mins</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">DHCP client timeout</td>
    <td class="TDpadded">5 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">CSMA/CD waiting time to resend</td>
    <td class="TDpadded">random</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">LMI timeout</td>
    <td class="TDpadded">15 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">LMI signaling</td>
    <td class="TDpadded">5 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">Inverse ARP</td>
    <td class="TDpadded">30 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">HDLC keepalive</td>
    <td class="TDpadded">5 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">HDLC timeout</td>
    <td class="TDpadded">15 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">NAT/NAT-PT entries timeout</td>
    <td class="TDpadded">Depends on the encapsulation protocol</td>
  </tr>
  <tr >
    <td class="TDpadded">NAT/NAT-PT entry encapsulated in a UDP </td>
    <td class="TDpadded">5 mins</td>
  </tr>
  <tr >
    <td class="TDpadded">NAT/NAT-PT entry encapsulated in a TCP</td>
    <td class="TDpadded">24 hrs</td>
  </tr>
  <tr >
    <td class="TDpadded">NAT/NAT-PT entry encapsulated in a ICMP</td>
    <td class="TDpadded">1 min</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">CHAP timeout </td>
    <td class="TDpadded">5 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">CHAP re-authenticate timeout </td>
    <td class="TDpadded">10 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">DIALING no answer timeout </td>
    <td class="TDpadded">5 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">DIALING no dial tone timeout </td>
    <td class="TDpadded">2 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">PPP keepalive interval </td>
    <td class="TDpadded">5 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">Timeout</td>
    <td class="TDpadded"> 15 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">EIGRP/EIGRPv6 Hello time interval period </td>
    <td class="TDpadded">5 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">EIGRP/EIGRPv6 Hold time interval period </td>
    <td class="TDpadded">15 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">ICMP</td>
    <td class="TDpadded">1 ms</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">STP Max Age</td>
    <td class="TDpadded">20 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">STP Hello</td>
    <td class="TDpadded">2 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">STP Forward Delay</td>
    <td class="TDpadded">15 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">STP Topology Change Notify Timer</td>
    <td class="TDpadded">2 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">STP Topology Change Timer</td>
    <td class="TDpadded">35 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">RSTP Migration Delay Timer</td>
    <td class="TDpadded">3 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">OSPF/OSPFv3 SPF Hold Time</td>
    <td class="TDpadded">10 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">OSPF/OSPFv3 LS Refresh Time</td>
    <td class="TDpadded">30 mins</td>
  </tr>
  <tr >
    <td class="TDpadded">OSPF/OSPFv3 SPF Delay Timer</td>
    <td class="TDpadded">5 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">OSPF/OSPFv3 LSA Retransmission Time</td>
    <td class="TDpadded">5 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">OSPF/OSPFv3 minimum LSA Arrival Time</td>
    <td class="TDpadded">1 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">OSPF/OSPFv3 Delayed Acknowledgment Timer</td>
    <td class="TDpadded">2.5 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">OSPF/OSPFv3 Dead Interval</td>
    <td class="TDpadded">40 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">OSPF/OSPFv3 Hello</td>
    <td class="TDpadded">10 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">OSPF/OSPFv3 Wait Interval</td>
    <td class="TDpadded">40 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">TCP Connection Timeout</td>
    <td class="TDpadded">60 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">TCP Initial Retransmission Timeout</td>
    <td class="TDpadded">300 msec</td>
  </tr>
  <tr >
    <td class="TDpadded">TCP Min Retransmission Timeout</td>
    <td class="TDpadded">50 msec</td>
  </tr>
  <tr >
    <td class="TDpadded">TCP Max Retransmission Timeout</td>
    <td class="TDpadded">1000 msec (1 sec)</td>
  </tr>
  <tr >
    <td class="TDpadded">TCP Inactivity Timeout</td>
    <td class="TDpadded">1 hour</td>
  </tr>
  <tr >
    <td class="TDpadded">TCP Close Timeout</td>
    <td class="TDpadded">10 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">DNS Request Timeout</td>
    <td class="TDpadded">3 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">DHCP Timeout</td>
    <td class="TDpadded">5 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">DHCP Discovery Timeout</td>
    <td class="TDpadded">55 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">DTP Hello</td>
    <td class="TDpadded">30 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">DTP Timeout</td>
    <td class="TDpadded">5 mins</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">Password Timeout</td>
    <td class="TDpadded">30 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">ND Neighbor Request Timer</td>
    <td class="TDpadded">2 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">ND Neighbor Stale Timer</td>
    <td class="TDpadded">30 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">ND Neighbor Timeout Timer</td>
    <td class="TDpadded">4 hrs</td>
  </tr>
  <tr >
    <td class="TDpadded">ND Router Solicitation Interval</td>
    <td class="TDpadded">4 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">ND Router Advertisement Interval</td>
    <td class="TDpadded">&lt;= 16  secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">DHCPv6 Solicitation Timeout</td>
    <td class="TDpadded">1 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">DHCPv6 Request Timeout</td>
    <td class="TDpadded">1 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">LACP Initial Advertise Interval</td>
    <td class="TDpadded">1 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">LACP Advertise Interval</td>
    <td class="TDpadded">30 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">LACP Peer Timeout</td>
    <td class="TDpadded">90 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">PAgP Initial Advertise Interval</td>
    <td class="TDpadded">1 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">PAgP Advertise Interval</td>
    <td class="TDpadded">30 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">PAgP Peer Timeout</td>
    <td class="TDpadded">90 secs</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">NTP Update Time</td>
    <td class="TDpadded">5 min</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">IKE Peer Default Timer</td>
    <td class="TDpadded">86400 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">IPSec Peer default timer</td>
    <td class="TDpadded">3600 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">CBAC/Zone Based TcpSyn Wait time</td>
    <td class="TDpadded">30 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">CBAC/Zone Based TcpFin wait time</td>
    <td class="TDpadded">5 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">CBAC/Zone Based Tcp Idle time</td>
    <td class="TDpadded">3600 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">CBAC/Zone Based Udp Idle time</td>
    <td class="TDpadded">30 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">CBAC/Zone Based Dns Timeout</td>
    <td class="TDpadded">5 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">CBAC/Zone Based Icmp Timeout</td>
    <td class="TDpadded">10 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">Outside Nat Udp time out value</td>
    <td class="TDpadded">300 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">Outside Nat Tcp time out value </td>
    <td class="TDpadded">86400 sec (24hr)</td>
  </tr>
  <tr >
    <td class="TDpadded">Outside Nat Icmp time out value</td>
    <td class="TDpadded">60 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">Outside Nat Standard time out value</td>
    <td class="TDpadded">86400sec (24 hr)</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">SNMP Request Timeout</td>
    <td class="TDpadded">10 sec</td>
  </tr>
   <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">Voip Rtp keepAlive time</td>
    <td class="TDpadded">15 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">Voip Rtp keepAlive wait time</td>
    <td class="TDpadded">90 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">Voip Sccp keepAlive timer</td>
    <td class="TDpadded">30 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">Voip Sccp retry timer</td>
    <td class="TDpadded">10 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">PPPoE reset keepAlive time</td>
    <td class="TDpadded">30 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">PPPoE authentication failed timer</td>
    <td class="TDpadded">10 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">PPPoE keep alive timer</td>
    <td class="TDpadded">10 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">PPPoE WRT300N connect timer</td>
    <td class="TDpadded">30 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">PPPoE WRT300N timeout timer</td>
    <td class="TDpadded">30 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">&nbsp;</td>
    <td class="TDpadded">&nbsp;</td>
  </tr>
  <tr >
    <td class="TDpadded">BGP hold down timer</td>
    <td class="TDpadded">180 sec</td>
  </tr>
   <tr >
    <td class="TDpadded">BGP connect retry timer</td>
    <td class="TDpadded">60 sec</td>
  </tr>
  <tr >
    <td class="TDpadded">BGP keep alive timer</td>
    <td class="TDpadded">60 sec</td>
  </tr>
</table>
</div>
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