User Manual

OSPF and OSPFv3
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M6100, M5300, and M7100 Series Managed Switches
configured the same. If all OSPF routers are capable of operating according to RFC
2328, RFC 1583 Compatibility must be disabled.
11. Set the Opaque LSA Status to Enable if OSPF will store and flood opaque LSAs.
An opaque LSA is used for flooding user-defined information within an OSPF router
domain.
12. When the number of nondefault external LSAs exceeds a configured limit, the router enters
an overflow state as defined in RFC 1765.
Use the Exit Overflow Interval field to specify how long in seconds OSPF must wait
before attempting to leave overflow state. In overflow state, OSPF cannot originate
nondefault external LSAs. If the Exit Overflow Interval is 0, OSPF does not leave the
overflow state until it is disabled and reenabled. The range is 0 to 2,147,483,647
seconds. The default is 0.
13. Configure the SPF Delay Time.
This is the number of seconds from when OSPF receives a topology change to the start
of the next SPF calculation. Delay Time is an integer from 0 to 65535 seconds. The
default is 5 seconds. A value of 0 means that there is no delay; that is, the SPF
calculation is started upon a topology change.
14. Configure the SPF Hold Time.
This is the minimum time in seconds between two consecutive SPF calculations. The
range is 0 to 65,535 seconds. The default time is 10 seconds. A value of 0 means that
there is no delay; that is, two SPF calculations can be done, one immediately after the
other.
15. Use the External LSDB Limit field to set the number of the external LSDB limit for OSPF.
If the value is –1, then there is no limit. When the number of nondefault AS-external-LSAs
in a router’s link state database reaches the external LSDB limit, the router enters
overflow state. The router never holds more than the external LSDB limit none-default
AS-external-LSAs in the database. The external LSDB limit must be set identically in all
routers attached to the OSPF backbone and/or any regular OSPF area. The range for the
External LSDB Limit field is –1 to 2147483647. The default value is –1.
16. Use the Default Metric field to set a default for the metric of redistributed routes.
This field is blank if a default metric was not configured. The range of valid values is 1 to
16777214. The default value is 0.
17. Use the Maximum Paths field to set the number of paths that OSPF can report for a given
destination.
The range of valid values is 1 to 16. The default value is 4.
18. Configure the AutoCost Reference Bandwidth to control how OSPF calculates link cost.
Specify the reference bandwidth in megabits per second. Unless a link cost is configured,
the link cost is computed by dividing the reference bandwidth by the interface bandwidth.
The range is 1 to 4294967. The default is 100.