A.AF B.AFI C.MAC D.Area E.SysID F.A-Selector G.N-Selector H.IP-address
A.0 B.1 C.2 D.3
A.Sending out a graceful restart PDU B.Sending an LSP that contains no TLVs. C.Sending out a restarts TLV with the RR bit set. D.Reflooding its LSP with a maximum sequence number.