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590 CHAPTER 19: OPEN SHORTEST PATH FIRST (OSPF)
ip ospf policy
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summary
Displays summary information about OSPF routing policies.
Valid Minimum Abbreviation
ip o po s
Important Considerations
■Your system has one unified IP routing table. Routing policies allow
you to control the flow of information amo ng the network, the
protocols, and the routing tables on your system.
■There are two classes of routing policies:
■Import policies — Control which OSPF non-self-originated
external routes are stored in the routing table. OSPF import policies
control only what the local router uses. They do not affect the
propagation of non-self-originated external routes to other routers.
■Export policies — Used on OSPF boun dary routers to control
which self-originated external routing updates are placed in the
link-state database for propagation over the netwo rk. In this way,
export policies govern what other routers le arn with regard to the
local boundary router’s self-originated information.
■The system tracks policies that you define in both OSPF and Routing
Information Protocol (RIP), so the indexes that are assigne d to your
policies may have gaps. For example, if you h ave OSPF policies 1 and
2, and RIP policies 3 through 6, the next policy is 7.
Fields in the IP OSPF Policy Summary D isplay
Field Description
Action Action for the route (accept or reject)
Idx Index number of the interface
Protocol Protocol (for example, OSPF)
Route Source network
Source Source router
Type Whether the policy is an import or export policy
Wt Administrative weig ht (range of values: 1 through 16)