1IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto GRE (47), length 54) 2 253.120.2.55 > 192.168.1.1: GREv0, Flags [none], length 34 3 IS-IS, length 30 4 L1 LSP, hlen: 27, v: 1, pdu-v: 1, sys-id-len: 6 (6), max-area: 7 (7) 5 lsp-id: ffff.ffff.ffff.ff-ff, seq: 0xffffffff, lifetime: 65535s 6 chksum: 0xffff (incorrect should be 0x0fe8), PDU length: 65535, Flags: [ L1 IS ] 7 IS Neighbor(s) (variable length) TLV #7, length: 0 8 1 straggler bytes 9IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto GRE (47), length 54) 10 234.176.145.73 > 192.168.1.1: GREv0, Flags [none], length 34 11 IS-IS, length 30 12 L1 LSP, hlen: 27, v: 1, pdu-v: 1, sys-id-len: 6 (6), max-area: 7 (7) 13 lsp-id: ffff.ffff.ffff.ff-ff, seq: 0xffffffff, lifetime: 65535s 14 chksum: 0xffff (incorrect should be 0x0fe8), PDU length: 65535, Flags: [ L1 IS ] 15 IS Neighbor(s) (variable length) TLV #7, length: 0 16 1 straggler bytes 17IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto GRE (47), length 54) 18 225.91.211.91 > 192.168.1.1: GREv0, Flags [none], length 34 19 IS-IS, length 30 20 L1 LSP, hlen: 27, v: 1, pdu-v: 1, sys-id-len: 6 (6), max-area: 7 (7) 21 lsp-id: ffff.ffff.ffff.ff-ff, seq: 0xffffffff, lifetime: 65535s 22 chksum: 0xffff (incorrect should be 0x0fe8), PDU length: 65535, Flags: [ L1 IS ] 23 IS Neighbor(s) (variable length) TLV #7, length: 0 24 1 straggler bytes 25IP (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto GRE (47), length 54) 26 160.196.17.46 > 192.168.1.1: GREv0, Flags [none], length 34 27 IS-IS, length 30 28 L1 LSP, hlen: 27, v: 1, pdu-v: 1, sys-id-len: 6 (6), max-area: 7 (7) 29 lsp-id: ffff.ffff.ffff.ff-ff, seq: 0xffffffff, lifetime: 65535s 30 chksum: 0xffff (incorrect should be 0x0fe8), PDU length: 65535, Flags: [ L1 IS ] 31 IS Neighbor(s) (variable length) TLV #7, length: 0 32 1 straggler bytes 33IP (tos 0x0, ttl 128, id 0, offset 0, flags [DF], proto GRE (47), length 54) 34 246.181.173.63 > 192.168.1.1: GREv0, Flags [none], length 34 35 IS-IS, length 30 36 L1 LSP, hlen: 27, v: 1, pdu-v: 1, sys-id-len: 6 (6), max-area: 7 (7) 37 lsp-id: ffff.ffff.ffff.ff-ff, seq: 0xffffffff, lifetime: 65535s 38 chksum: 0xffff (incorrect should be 0x0fe8), PDU length: 65535, Flags: [ L1 IS ] 39 IS Neighbor(s) (variable length) TLV #7, length: 0 40 1 straggler bytes 41