Publication Date: 2019-05-13 | Views: 549 | Downloads: 0 | Document ID: EKB1100015044
In normal cases, the ABR
automatically generates default Type 7 LSAs and advertises them to the NSSA
only when at least a neighbor in Full state and an interface in Up state exist
in the backbone area.
How to allow an NE20E-S to deliver default routes when a neighbor in Full state
does not exist in the OSPF backbone area?
The backbone-peer-ignore command
ignores the check of the neighbor status of the backbone area. Specifically,
the ABR automatically generates default Type 7 LSAs to the NSSA when an
interface in Up state exists in the backbone area, regardless of whether a
neighbor in Full state exists.
Note that after the nssa
default-route-advertise backbone-peer-ignore no-summary command is run, the
ABR generates default Type 7 LSAs and default Type 3 LSAs when an interface in
Up state exists in the backbone area, regardless of whether a neighbor in Full
state exists. The default Type 3 LSAs take effect in priority over Type 7 LSAs.