OSPF/6/CANNOT_ENTER_HELPER

Reasons that the OSPF process cannot enter the helper mode.

• 0. The end state cannot enter the helper, because the client is not Full.
• 1. RestartIng neighbor's retransmission list containing the changes in LSA.
• 2. Helper not enabled.
• 3. Restarting NBR sent graceLSA and helper configuration does not match.
• 4. Neighbor router-id does not match.
• 5. This interface has become the neighbor's helper.
• 6. Helper policy not enabled.
• 7. Grace period error.
• 8. Invalid reason error.