3Com corebuilder 3500 Implementation Manual page 412

412 C 14: O
HAPTER PEN
Table 51 OSPF Export Policies for Directly Connected Interfaces
Origin
Protocol
Direct
Direct
S P F (OSPF)
HORTEST ATH IRST
Export Policies for Direct Interfaces
Table 51 shows the possible export policies that can be applied to directly
connected router interfaces.
Policy
Interface Action
Specific non-OSPF Accept
interface or All
non-OSPF
interfaces
Specific non-OSPF Reject
interface or All
non-OSPF
interfaces
Export Example 1: Prohibit Advertisement of non-OSPF Interfaces
The policy defined in Table 52 prohibits an autonomous system boundary
router from advertising any directly connected non-OSPF interfaces.
Table 52 Export Policy to Reject Direct Interfaces
Policy Field
Policy type
Origin Protocol
IP interfaces
Policy action
Administrative weight
The router prohibits the address of any of its directly connected RIP
interfaces from being placed in external link advertisements. As a result,
the interfaces are not advertised over the network.
Because all OSPF routers must maintain similar link state databases and
shortest path trees, you cannot define an export policy to restrict the
advertisement of directly connected OSPF interfaces.
External
Metric Metric
Adjustment Type
C Type 1,
Type 2
N/A N/A
Definition
export
dir
all
reject
1
Description
The specified interfaces are
advertised as a Type 1 or
Type 2 metric with a cost
of C.
Do not advertise the
specified interfaces.