Routing Commands
281
ProSafe Managed Switch
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 approximately 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
