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Routing Commands
285
ProSafe M4100 and M7100 Managed Switches
timers pacing lsa-group
To adjust how OSPF groups LSAs for periodic refresh, use this command in OSPFv2 Router
Configuration mode. OSPF refreshes self-originated LSAs once every 30 minutes. When
OSPF refreshes LSAs, it considers all self-originated LSAs whose age is from 1800 to 1800
plus the pacing group size. Grouping LSAs for refresh allows OSPF to combine refreshed
LSAs into a minimal number of LS Update packets. Minimizing the number of Update
packets makes LSA distribution more efficient. When OSPF originates a new or changed
LSA, it selects a random refresh delay for the LSA. When the refresh delay expires, OSPF
refreshes the LSA. By selecting a random refresh delay, OSPF avoids refreshing a large
number of LSAs at one time, even if a large number of LSAs are originated at one time.
Default
Format
timers pacing lsa-group seconds
Mode
timers spf
Use this command to configure the SPF delay time and hold time. The valid range for both
parameters is 0-65535 seconds.
Default
• delay-time—5
• hold-time—10
Format timers spf <delay-time> <hold-time>
Mode
60 seconds
OSPFv2 Router Configuration
Parameter Description
seconds Width of the window in which LSAs are refreshed. The range for the pacing group window is
from 10 to 1800 seconds.
Router OSPF Config