Table 16: Recommended Routing Protocol Timer Settings - Juniper SERVICE AVAILABILITY - CONFIGURATION GUIDE V 11.1.X Configuration Manual

Table 16: Recommended Routing Protocol Timer Settings

Protocol Timers
BFD Use the default timers.
BGP Use the default timers, including graceful restart default timers. If the
expected forwarding outage for the platform is beyond what the BGP
session's graceful restart mechanism can survive, the unified ISSU
initialization process generates a warning message accordingly. In
this event, adjust the timer intervals as advised by the message.
For information about the expected forwarding outage, see
"Interruption in Traffic Forwarding for Layer 3 Routing Protocols
During Unified ISSU" on page 92.
DVMRP Use the default timers.
IGMP Use the default timers.
IS-IS Use the default timers, including graceful restart default timers.
LDP Use the default timers, including graceful restart default timers, except
for the following:
Set the hello hold time to at least 901 seconds for a helper or a
restarter configuration for a link-level adjacency or for LDP
targeted sessions.
OSPF Use the default timers, including graceful restart default timers, except
for the dead interval.
If the expected forwarding outage for the platform is longer than the
configured dead interval, the unified ISSU initialization process
generates a warning message accordingly. In this event, adjust the
timer interval as advised by the message.
For information about the expected forwarding outage, see
"Interruption in Traffic Forwarding for Layer 3 Routing Protocols
During Unified ISSU" on page 92.
PIM Set the query interval to at least 210 seconds.
Unified ISSU generates a warning for any of the following conditions,
but you can ignore the warning without causing a higher FC outage:
The current router is a DR.
The current router is configured as an Auto RP mapping agent
and is chosen as the RP for any group.
The current router is an elected or candidate BSR, or if BSR
candidate RPs are configured.
The graceful restart timer is less than the default value, 30
seconds.
Recommended Settings for Routing Protocol Timers During Unified ISSU
Chapter 4: Configuring a Unified In-Service Software Upgrade
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