Hello! I'm trying to build mapping from IP to AS number with bgpdump-1.4.99.15 and my custom toolkit. So I downloaded dump http://archive.routeviews.org/bgpdata/2015.11/RIBS/rib.20151128.0600.bz2 and trying to parse it with bgpdump. For about 90% of full BGP table I'm getting correct values for ASPATH. For example for my ASN 198068 I got: TIME: 11/28/15 06:00:03 TYPE: TABLE_DUMP_V2/IPV4_UNICAST PREFIX: 46.36.223.0/24 SEQUENCE: 55029 FROM: 147.28.7.2 AS3130 ORIGINATED: 11/11/15 18:25:25 ORIGIN: IGP ASPATH: 3130 2914 9002 198068 NEXT_HOP: 147.28.7.2 MULTI_EXIT_DISC: 2 COMMUNITY: 2914:410 2914:1201 2914:2202 2914:3200 3130:380 But some prefixes I'm getting very strange ASPATH with ASN enclosed in curly quotes. For example you could look at: TIME: 11/28/15 06:00:01 TYPE: TABLE_DUMP_V2/IPV4_UNICAST PREFIX: 5.39.176.0/21 SEQUENCE: 5583 FROM: 147.28.7.1 AS3130 ORIGINATED: 11/13/15 08:02:15 ORIGIN: IGP ASPATH: 3130 2914 3356 8530 {198753} NEXT_HOP: 147.28.7.1 AGGREGATOR: AS8530 91.143.64.24 COMMUNITY: 2914:420 2914:1007 2914:2000 2914:3000 3130:380 How I should interpret this record "3130 2914 3356 8530 {198753}"? Who are origin for this prefix 8530 or 198753? After some time of digging to this data I got more strange example: TIME: 11/28/15 06:00:06 TYPE: TABLE_DUMP_V2/IPV4_UNICAST PREFIX: 69.43.64.0/18 SEQUENCE: 108538 FROM: 195.208.112.161 AS3277 ORIGINATED: 11/27/15 13:37:08 ORIGIN: IGP ASPATH: 3277 3267 174 32432 {6939,46887} NEXT_HOP: 195.208.112.161 AGGREGATOR: AS32432 38.88.209.254 COMMUNITY: 3277:3267 3277:65321 3277:65323 3277:65331 So I really haven't any ideas about this ASPATH: 3277 3267 174 32432 {6939,46887}. Could you clarify both cases (with single and multiple AS numbers) with curly quotes? -- Sincerely yours, Pavel Odintsov