H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – IPv4 Routing
H3C S7500E Series Ethernet Switches Chapter 3 OSPF Configuration
3-20
An NSSA external LSA originates from the ASBR in a NSSA and is flooded in the NSSA
area only. It has the same format as the AS external LSA.
Figure 3-20 NSSA external LSA format
3.1.6 Supported OSPF Features
I. Multi-process
With multi-process support, multiple OSPF processes can run on a router
simultaneously and independently. Routing information interactions between different
processes seem like interactions between different routing protocols. Multiple OSPF
processes can use the same RID.
An interface of a router can only belong to a single OSPF process.
II. Authentication
OSPF supports authentication on packets. Only packets that pass the authentication
are received. If hello packets cannot pass authentication, no neighbor relationship can
be established.
The authentication type for interfaces attached to a single area must be identical.
Authentication types include non-authentication, plaintext authentication and MD5
ciphertext authentication. The authentication password for interfaces attached to a
network segment must be identical.
III. Hot Standby
 Note:
For hot standby configuration, refer to HA Configuration.