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