4-16
Field Description
OSPF: packet size > ip length OSPF packet size exceeds IP packet length
OSPF: transmit error OSPF transmission error
OSPF: interface down OSPF interface is down, unavailable
OSPF: unknown neighbor OSPF neighbors are unknown
HELLO: netmask mismatch Network mask mismatch
HELLO: hello timer mismatch Interval of HELLO packet is mismatched
HELLO: dead timer mismatch Interval of dead neighbor packet is mismatched
HELLO: extern option mismatch Extern option of Hello packet is mismatched
HELLO: router id confusion Hello packet: Router ID confusion
HELLO: virtual neighbor unknown Hello packet: unknown virtual neighbor
HELLO: NBMA neighbor unknown Hello packet: unknown NBMA neighbor
DD: neighbor state low
Database description (DD) packet: asynchronous neighbor
state
DD: router id confusion DD packet: router id unidentifiable
DD: extern option mismatch DD packet: external route flag error
DD: unknown LSA type DD packet: unknown LSA type
LS ACK: neighbor state low
Link state acknowledgment (LS ACK) packet: asynchronous
neighbor state
LS ACK: wrong ack Link state acknowledgment packet: ack error
LS ACK: duplicate ack Link state acknowledgment packet: ack duplication
LS ACK: unknown LSA type Link state acknowledgment packet: unknown LSA type
LS ACK: ACK length wrong Link state acknowledgment packet: ACK length error
LS REQ: neighbor state low
Link state request (LS REQ) packet: asynchronous neighbor
state
LS REQ: empty request Link state request packet: empty request
LS REQ: wrong request Link state request packet: erroneous request
LS REQ: wrong length Link state request packet: length error
LS UPD: neighbor state low Link state update packet: asynchronous neighbor state
LS UPD: newer self-generate LSA Link state update packet: newer LSA generated by itself
LS UPD: LSA checksum wrong Link state update packet: LSA checksum error
LS UPD:received less recent LSA Link state update packet: received less recent LSA
LS UPD: unknown LSA type Link state update packet: unknown LSA type
OSPF routing: next hop not exist Next hop of OSPF routing does not exist
DD: MTU option mismatch MTU option of DD packet is mismatched
ROUTETYPE: wrong type value Route type: the value of the type is wrong
LS UPD: LSA length wrong Link state update packet: LSA length error