Timers

1 Second

• Default VRRP hello timer
• Default Group Specific Query interval (Maximum Response Time of 10) for IGMPv2

2 Seconds

• Default IEEE 802.1D STP hello timer
• Default IGMPv2 Last Member Query Count x 2

3 Seconds

• Default GLBP hello timer (Cisco IOS)
• Default HSRP hello timer (Cisco IOS)

5 Seconds

• Default EIGRP hello timer on links >= 1.544 Mbps (Cisco IOS)
• Default LDP hello timer for links (Cisco IOS)

10 Seconds

• Default HSRP hold timer (Cisco IOS)
• Default IS-IS hello timer (Cisco IOS)
• Default OSPF hello timer on broadcast and point-to-point links (Cisco IOS/JunOS)
• Default LDP hello timer for targeted LDP (Cisco IOS)
• Default LMI Frame Relay message
• Default IGMPv2 Query Response Interval

15 Seconds

• Default EIGRP hold timer on links >= 1.544 Mbps (Cisco IOS)
• Default IEEE 802.1D STP forwarding delay
• Default UDLD probe interval (Cisco IOS)
• Default LDP hold timer for link hellos (Cisco IOS)
• Default LDP hello timer for targeted LDP (JunOS)

20 Seconds

• Default IEEE 802.1D STP maximum BPDU age
• WCP Keep-Alive Timer (Cat65k/3750)

30 Seconds

• Default IS-IS hold timer (Cisco IOS)
• Default LLDP advertisement interval (Cisco IOS)
• Default OSPF hello timer on nonbroadcast links (Cisco IOS)
• Default RIP update interval
• Default DTP hello interval (Cisco IOS)

40 Seconds

• Default OSPF hold timer on broadcast and point-to-point links (Cisco IOS/JunOS)

45 Seconds

• Default LDP hold timer for targeted hellos (JunOS)

60 Seconds

• Default BGP keepalive interval
• Default BGP scan time for next-hop validation (Cisco IOS)
• Default CDP advertisement interval (Cisco IOS)
• Default EIGRP hello timer on links < 1.544 Mbps (Cisco IOS)
• Default NAT DNS translation timeout (Cisco IOS)
• Default NAT ICMP translation timeout (Cisco IOS)
• Default NAT TCP SYN packet translation timeout (Cisco IOS)
• Default NAT TCP FIN/RST packet translation timeout (Cisco IOS)
• Default LMI Frame Relay full Status message (every 6th message)

90 Seconds

• Default LDP hold timer for targeted hellos (Cisco IOS)

120 Seconds

• Default OSPF hello timer on nonboradcast links (Junos)
• Default OSPF hold timer on nonbroadcast links (Cisco IOS)

125 Seconds

• Default IGMPv2 Query Interval

180 Seconds

• Default BGP hold timer
• Default EIGRP hold timer on links < 1.544 Mbps (Cisco IOS)
• Default RIP holddown timer
• Default RIP invalidation timer
• EIGRP SIA

240 Seconds

• Default RIP flush timer

255 Seconds

• Default IGMPv2 Other Querier Present Interval

260 Seconds

• Default IGMPv2 Group Membership Interval

300 Seconds

• Default DHCP snooping database transfer timeout (Cisco IOS)
• Default NAT UDP translation timeout (Cisco IOS)
• Default recovery period for many errdisable triggers (Cisco IOS)
• Default MAC address table aging time (Cisco IOS)
• Default TCP session timer (F5 BIG-IP)

10 Minutes

• Default VTY exec-timeout (Cisco IOS)
• Default GLBP redirect timer

16 Minutes, 40 Seconds

• Default IGMP leave timer (Cisco IOS)

30 Minutes

• OSPF LSA refresh timer

60 Minutes

• OSPF LSA expiration timer

120 Minutes

• TCP Keep Alive Timer/Interval (default)

4 Hours

• Default ARP timeout (Cisco IOS)
• Default GLBP timeout timer

24 Hours

• Default NAT TCP translation timeout (Cisco IOS)