//
Sub-10 seconds
33 entries
Hello timers, keepalives, EAP, IGMP, BFD — anything that ticks fast.
150ms
Default BFD minimum interval (Cisco IOS-XE). Detection time = 150ms × 3 multiplier = 450ms.
1s
Default VRRP hello timer.
1s
Default BFD minimum interval (Junos). Detection time = 1s × 3 = 3s.
1s
LACP fast-rate hello PDU interval (when configured).
1s
IPv6 ND DAD (Duplicate Address Detection) probe interval.
1s
IPv6 ND retransmit timer.
1s
Default EAP-Identity-Request timeout (Unified WLAN).
1s
Default EAP-Request timeout (Unified WLAN).
1s
Default EAPOL-KEY timeout (Unified WLAN).
1s
CleanAir AP sampling interval (Unified WLAN).
1s
Default IGMPv2 group-specific query interval (max response time of 10).
2s
Default IEEE 802.1D STP hello timer.
2s
Default RADIUS / LDAP server timeout (Unified & Autonomous WLAN).
2s
Default NMSP updates from WLC to Loc/MSE server (Unified WLAN).
2s
Default IGMPv2 last-member query count × 2.
3s
Default GLBP hello timer (Cisco IOS).
3s
Default HSRP hello timer (Cisco IOS).
3s
LACP fast-rate timeout (3 × fast-rate hello).
5s
Default EIGRP hello timer on links ≥ 1.544 Mbps (Cisco IOS).
5s
Default LDP hello timer for links (Cisco IOS).
5s
Default TACACS+ / RADIUS server response timeout.
5s
Default OSPF SPF throttle initial delay (5000ms, Cisco IOS-XE).
10s
Default HSRP hold timer (Cisco IOS).
10s
Default IS-IS hello timer (Cisco IOS).
10s
Default OSPF hello on broadcast & point-to-point links (Cisco IOS / JunOS).
10s
Default 802.1x supplicant response timeout (Unified WLAN).
10s
Default Mobility keepalive interval (Unified WLAN).
10s
Default AP discovery timeout (Unified WLAN).
10s
Default LDP hello timer for targeted LDP (Cisco IOS).
10s
Default LMI Frame Relay message.
10s
Default IGMPv2 query response interval.
10s
Default GRE keepalive interval (when enabled; off by default).
10s
Default OSPF SPF throttle hold (10000ms, Cisco IOS-XE).
//
10 seconds to 1 minute
35 entries
STP, UDLD, LLDP, RIP, the slower hellos.
15s
Default EIGRP hold timer on links ≥ 1.544 Mbps (Cisco IOS).
15s
Default IEEE 802.1D STP forwarding delay.
15s
Default UDLD probe interval (Cisco IOS).
15s
CleanAir AP AQI calculation interval (Unified WLAN).
15s
Default LDP hold timer for link hellos (Cisco IOS).
15s
Default LDP hello timer for targeted LDP (JunOS).
20s
Default IEEE 802.1D STP maximum BPDU age.
20s
WCP keep-alive timer (Unified WLAN WiSM / Cat65k / 3750).
30s
Default IS-IS hold timer (Cisco IOS).
30s
Default LLDP advertisement interval (Cisco IOS).
30s
Default OSPF hello on nonbroadcast links (Cisco IOS).
30s
Default RIP update interval.
30s
Default AP heartbeat timeout (Unified WLAN).
30s
Default 802.1x supplicant response timeout (Autonomous WLAN).
30s
Default DTP hello interval (Cisco IOS).
30s
Default PIM hello timer.
30s
Default IPv6 ND reachable time.
30s
LACP slow-rate hello PDU interval (default).
64s
Default NTP poll minimum (2^6 seconds).
40s
Default OSPF hold timer on broadcast & point-to-point links (Cisco IOS / JunOS).
45s
Default LDP hold timer for targeted hellos (JunOS).
60s
Default BGP keepalive interval.
60s
Default BGP scan time for next-hop validation (Cisco IOS).
60s
Default CDP advertisement interval (Cisco IOS).
60s
Default EIGRP hello on links < 1.544 Mbps (Cisco IOS).
60s
Default NAT DNS translation timeout (Cisco IOS).
60s
Default NAT ICMP translation timeout (Cisco IOS).
60s
Default NAT TCP SYN packet translation timeout (Cisco IOS).
60s
Default NAT TCP FIN/RST packet translation timeout (Cisco IOS).
60s
Default RRM neighbor packets (Unified WLAN).
60s
Default CCX location measurement (Unified WLAN).
60s
Default client exclusion (Unified WLAN).
60s
Default IGMP snooping timeout (Unified WLAN).
60s
Default client idle timeout (Autonomous WLAN).
60s
Default LMI Frame Relay full status message (every 6th message).
//
1 to 5 minutes
28 entries
Hold timers, IGMPv2 lifetimes, NAT translations, errdisable recovery.
90s
Traffic stream metric reports (Unified WLAN).
90s
Default LDP hold timer for targeted hellos (Cisco IOS).
90s
LACP slow-rate timeout (3 × 30s slow hello).
90s
Default MSDP SA refresh advertisement timer.
105s
Default PIM hold timer (3.5 × 30s hello).
120s
Default BGP Graceful Restart restart timer.
120s
Default OSPF hello on nonbroadcast links (JunOS).
120s
Default OSPF hold timer on nonbroadcast links (Cisco IOS).
120s
Default AP primary discovery timeout (Unified WLAN).
125s
Default IGMPv2 query interval.
200s
Default IPv6 ND Router Advertisement minimum interval.
180s
Default BGP hold timer.
180s
Default EIGRP hold timer on links < 1.544 Mbps (Cisco IOS).
180s
Default RIP holddown timer.
180s
Default RIP invalidation timer.
180s
EIGRP SIA.
180s
Default RRM off-channel scanning sweep time (Unified WLAN).
240s
Default RIP flush timer.
255s
Default IGMPv2 other-querier-present interval.
260s
Default IGMPv2 group membership interval.
300s
Default DHCP snooping database transfer timeout (Cisco IOS).
300s
Default NAT UDP translation timeout (Cisco IOS).
300s
Default recovery period for many errdisable triggers (Cisco IOS).
300s
Default MAC address table aging time (Cisco IOS).
300s
Default TCP session timer (F5 BIG-IP).
300s
Default client idle timeout (Unified WLAN).
300s
Default ARP timeout (Unified WLAN).
300s
Default RADIUS fallback interval (Unified WLAN).
//
5 minutes to 1 hour
15 entries
WLAN housekeeping, OSPF LSA refresh, NHRP, IGMP leave, NTP poll max.
5m 20s
WCP keep-alive timeout & controller reboot (Unified WLAN WiSM / Cat65k / 3750).
6m
Default BGP Graceful Restart stale-path timer (360s).
10m
Default IPv6 ND Router Advertisement maximum interval (600s).
17m
Default NTP poll maximum (2^10 = 1024 seconds).
30m
Default NHRP holdtime (DMVPN, 1800s).
10m
Default VTY exec-timeout (Cisco IOS).
10m
Default GLBP redirect timer.
10m
Default RF group update interval (Unified WLAN).
10m
Default RRM DCA channel update interval (Unified WLAN).
10m
Default RRM TPC power update interval (Unified WLAN).
15m
CleanAir AQI reporting interval (Unified WLAN).
16m 40s
Default IGMP leave timer (Cisco IOS).
20m
Default rogue entry timeout (Unified WLAN).
30m
OSPF LSA refresh timer.
30m
Default client session timeout (Unified WLAN).
//
1 hour and longer
9 entries
ARP, NAT TCP, OSPF LSA expiration, TCP keepalive, the long-running stuff.
1h
OSPF LSA expiration timer.
1h
Default 802.1X reauthentication timer (3600s, when reauth is enabled).
1h
Default DHCPv6 SOL_MAX_RT (max solicit retransmission interval, 3600s).
2h
Default TCP keepalive timer / interval.
4h
Default ARP timeout (Cisco IOS).
4h
Default GLBP timeout timer.
24h
Default NAT TCP translation timeout (Cisco IOS).
24h
Default WLC local guest user account lifetime (Unified WLAN).
7d
CleanAir persistent device avoidance interval (Unified WLAN).