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User Guide for Cisco Security Manager 4.4
OL-28826-01
Chapter 64 Configuring Routing Policies
OSPF Routing on Cisco IOS Routers
OSPF Routing on Cisco IOS Routers
Open Shortest Path First (OSPF) is an interior gateway routing protocol that uses link states instead of
distance vectors to distribute routing information within a single autonomous system (AS). OSPF
propagates link-state advertisements (LSAs) instead of routing table updates, which allows OSPF
networks to converge more quickly than RIP networks. You define areas to limit the number of LSAs
that need to be propagated to changes that occur within the area.
Protocol to Redistribute
(continued)
• OSPF—Redistributes a different OSPF process. You can define a
single mapping for each process. Select a process from the
displayed list, then select one or more match criteria:
–
Internal—Routes that are internal to a specific AS.
–
External1—Routes that are external to the AS and imported
into OSPF as a Type 1 external route.
–
External2—Routes that are external to the AS and imported
into the selected process as a Type 2 external route.
–
NSAAExternal1—Not-So-Stubby Area (NSSA) routes that
are external to the AS and imported into the selected process
as Type 1 external routes.
–
NSAAExternal2—(NSSA) routes that are external to the AS
and imported into the selected process as Type 2 external
routes.
• RIP—Redistributes RIP routes.
• Connected—Redistributes routes that are established
automatically by virtue of having enabled IP on an interface. These
routes are redistributed as external to the AS.
Metrics The default metric (cost) of the redistributed route. Metric parameters
include:
• Bandwidth—The minimum bandwidth of the path in kilobits per
second. Valid values range from 1 to 4294967295.
• Delay—The mean latency of the path in units of 10 microseconds.
Valid values range from 0 to 4294967295.
• Reliability—A value expressing the estimated reliability of the
link. Valid values range from 0 to 255, where 255 represents 100%
reliability.
• Effective Bandwidth—A value expressing the effective load on the
link. Valid values range from 1 to 255, where 255 represents 100%
utilization.
• MTU of Path—The maximum transmission unit of the path. Valid
values range from 1 to 65535 bytes.
Table 64-10 EIGRP Redistribution Mapping Dialog Box (Continued)
Element Description