A router has been configured with OSPF authentication on interface fa0/0. The OSPF
neighbor relationship is not forming. You issue a “debug ip ospf events” command and see
the following log message:
05:01:35: OSPF: Rcv pkt from 192.168.2.2, OSPF_VL0 : Mismatch Authentication type.
Input packet specified type 0, we use type 1
Using this information, which of the following is true? Choose the best answer.
A.
Fa0/0 on the local router has the following configuration.
ip ospf authentication type-1
B.
Fa0/0 on the local router has the following configuration.
ip ospf authentication
C.
Fa0/0 on the local router has the following configuration.
ip ospf authentication null
D.
Fa0/0 on the local router has the following configuration.
ip ospf authentication message-digest
This message indicates this information:
Type 0 indicates that no authentication is enabled.
Type 1 is for plain text authentication to be enabled.
Type 2 means that MD5 authentication is enabled.
area 0 authentication
!— Plain text authentication is enabled for !— all interfaces in Area 0.
area 0 authentication message-digest –>
!— MD5 authentication is enabled for !— all interfaces in Area 0.
Reference:http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13697-25.html