PPP Trace Examples
The following examples show how ppptrace can be used to detect and diagnose problems with a PPP link.
Trace Example 1--Successful Link Establishment
The following example trace shows an exchange of LPC and IPNCP packets that results in a PPP link established successfully between two hosts:
18:10:32: ipdptp0 Send: LCP Packet Config Request [id: 15] [length: 0012] Maximun Receive unit: 1500 Magic Number: 4e0d20fb Protocol Field Compression Address and Control Field Compression 18:10:32: ipdptp0 Recv: LCP Packet Config Request [id: 15] [length: 0012] Maximun Receive unit: 1500 Magic Number: 4e0d20fb Protocol Field Compression Address and Control Field Compression 18:10:32: ipdptp0 Recv: LCP Packet Config Request [id: 1c] [length: 0012] Maximun Receive unit: 1500 Magic Number: 17d1cf32 Protocol Field Compression Address and Control Field Compression 18:10:32: ipdptp0 Send: LCP Packet Config Request [id: 16] [length: 0012] Maximun Receive unit: 1500 Magic Number: 4e0d20fb Protocol Field Compression Address and Control Field Compression 18:10:32: ipdptp0 Send: LCP Packet Config Ack [id: 1c] [length: 0012] Maximun Receive unit: 1500 Magic Number: 17d1cf32 Protocol Field Compression Address and Control Field Compression 18:10:33: ipdptp0 Recv: LCP Packet Config Request [id: 1d] [length: 0012] Maximun Receive unit: 1500 Magic Number: 17d1cf32 Protocol Field Compression Address and Control Field Compression 18:10:33: ipdptp0 Send: LCP Packet Config Ack [id: 1d] [length: 0012] Maximun Receive unit: 1500 Magic Number: 17d1cf32 Protocol Field Compression Address and Control Field Compression 18:10:33: ipdptp0 Recv: LCP Packet Config Ack [id: 16] [length: 0012] Maximun Receive unit: 1500 Magic Number: 4e0d20fb Protocol Field Compression Address and Control Field Compression 18:10:33: ipdptp0 Send: NCP Packet Internet Protocol Config Request [id: 17] [length: 0010] IP Compression Protocol Van Jacobson IP Address: 129.157.204.61 18:10:33: ipdptp0 Recv: NCP Packet Internet Protocol Config Request [id: 1e] [length: 0010] IP Compression Protocol Van Jacobson IP Address: 129.157.204.177 18:10:33: ipdptp0 Send: NCP Packet Internet Protocol Config Ack [id: 1e] [length: 0010] IP Compression Protocol Van Jacobson IP Address: 129.157.204.177 18:10:33: ipdptp0 Recv: NCP Packet Internet Protocol Config Ack [id: 17] [length: 0010] IP Compression Protocol Van Jacobson IP Address: 129.157.204.61 |
Trace Example 2 -- Failed CHAP Negotiation
The following example trace shows the sequence of events that occur at the caller side, when the caller requests CHAP authentication from a peer that is not configured to support CHAP:
11:17:41: ipdptp0 Send: LCP Packet Config Request [id: 55] [length: 0012] Maximun Receive unit: 1500 Magic Number: ae36559a Protocol Field Compression Address and Control Field Compression 11:17:42: ipdptp0 Recv: LCP Packet Config Request [id: 55] [length: 0012] Maximun Receive unit: 1500 Magic Number: ae36559a Protocol Field Compression Address and Control Field Compression 11:17:42: ipdptp0 Recv: LCP Packet Config Request [id: 0e] [length: 0017] Maximun Receive unit: 1500 Authentication protocol: CHAP using MD5 algorithm Magic Number: 3ca14856 Protocol Field Compression Address and Control Field Compression 11:17:42: ipdptp0 Send: LCP Packet Config Reject [id: 0e] [length: 0009] Authentication protocol: CHAP using MD5 algorithm 11:17:42: ipdptp0 Recv: LCP Packet Terminate Request [id: 0f] [length: 0004] 11:17:42: ipdptp0 Send: LCP Packet Terminate Ack [id: 0f] [length: 0004] 11:17:45: ipdptp0 Send: LCP Packet Config Request [id: 56] [length: 0012] Maximun Receive unit: 1500 Magic Number: ae36559a Protocol Field Compression Address and Control Field Compression 11:17:48: ipdptp0 Send: LCP Packet Config Request [id: 57] [length: 0012] Maximun Receive unit: 1500 Magic Number: ae36559a Protocol Field Compression Address and Control Field Compression . . . 11:18:09: ipdptp0 Send: LCP Packet Config Request [id: 5f] [length: 0012] Maximun Receive unit: 1500 Magic Number: ae36559a Protocol Field Compression Address and Control Field Compression |
The following example trace shows the corresponding sequence of events that occur at the answering side:
18:28:21: ipdptp0 Send: LCP Packet Config Request [id: 20]
[length: 0017]
Maximun Receive unit: 1500
Authentication protocol: CHAP using MD5 algorithm
Magic Number: f16105df
Protocol Field Compression
Address and Control Field Compression
18:28:21: ipdptp0 Recv: LCP Packet Config Reject [id: 20]
[length: 0009]
Authentication protocol: CHAP using MD5 algorithm
18:28:21: ipdptp0 Send: LCP Packet Terminate Request [id: 21]
[length: 0004]
18:28:21: ipdptp0 Recv: LCP Packet Terminate Ack [id: 21]
[length: 0004]
|
Trace Example 3 -- Successful CHAP Negotiation
The following example trace shows the sequence of events that occur at the caller side, when CHAP authentication is negotiated successfully:
13:49:58: ipdptp0 Send: LCP Packet Config Request [id: 62] [length: 0012] Maximun Receive unit: 1500 Magic Number: 7bc9c0bb Protocol Field Compression Address and Control Field Compression 13:49:59: ipdptp0 Recv: LCP Packet Config Request [id: 62] [length: 0012] Maximun Receive unit: 1500 Magic Number: 7bc9c0bb Protocol Field Compression Address and Control Field Compression 13:49:59: ipdptp0 Recv: LCP Packet Config Request [id: 1b] [length: 0016] Maximun Receive unit: 1500 Authentication protocol: PAP Magic Number: 406bdebf Protocol Field Compression Address and Control Field Compression 13:49:59: ipdptp0 Send: LCP Packet Config Request [id: 63] [length: 0012] Maximun Receive unit: 1500 Magic Number: 7bc9c0bb Protocol Field Compression Address and Control Field Compression 13:49:59: ipdptp0 Send: LCP Packet Config Ack [id: 1b] [length: 0016] Maximun Receive unit: 1500 Authentication protocol: PAP Magic Number: 406bdebf Protocol Field Compression Address and Control Field Compression 13:49:59: ipdptp0 Recv: LCP Packet Config Request [id: 1c] [length: 0016] Maximun Receive unit: 1500 Authentication protocol: PAP Magic Number: 406bdebf Protocol Field Compression Address and Control Field Compression 13:49:59: ipdptp0 Send: LCP Packet Config Ack [id: 1c] [length: 0016] Maximun Receive unit: 1500 Authentication protocol: PAP Magic Number: 406bdebf Protocol Field Compression Address and Control Field Compression 13:49:59: ipdptp0 Recv: LCP Packet Config Ack [id: 63] [length: 0012] Maximun Receive unit: 1500 Magic Number: 7bc9c0bb Protocol Field Compression Address and Control Field Compression 13:49:59: ipdptp0 Send: PAP Packet Authenticate Request [id: 01] [length: 0010] Peer ID: 4e 41 4d 45 (NAME) Password: 50 41 53 53 57 44 (PASSWD) 13:49:59: ipdptp0 Recv: PAP Packet Authenticate Ack [id: 01] [length: 0005] No message 13:49:59: ipdptp0 Send: NCP Packet Internet Protocol Config Request [id: 64] [length: 0010] IP Compression Protocol Van Jacobson IP Address: 129.157.204.61 13:49:59: ipdptp0 Recv: NCP Packet Internet Protocol Config Request [id: 1d] [length: 0010] IP Compression Protocol Van Jacobson IP Address: 129.157.204.177 13:49:59: ipdptp0 Send: NCP Packet Internet Protocol Config Ack [id: 1d] [length: 0010] IP Compression Protocol Van Jacobson IP Address: 129.157.204.177 13:49:59: ipdptp0 Recv: NCP Packet Internet Protocol Config Ack [id: 64] [length: 0010] IP Compression Protocol Van Jacobson IP Address: 129.157.204.61 |
Trace Example 4 -- Dump of Successful ping
The following example trace shows a dump of the PPP frames exchanged during the successful execution of a ping(1M) command over an established PPP link:
18:38:37: ipdptp0 Send: Internet Protocol Packet 21 45 00 00 54 86 e1 40 00 ff 01 58 9d 81 9d cc "!E..T..@...X...." 3d 81 9d cc b1 08 00 f9 4c 02 51 00 00 2f ba 26 "=.......L.Q../.&" 8d 00 01 bb 16 08 09 0a 0b 0c 0d 0e 0f 10 11 12 "................" 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 21 22 "..............!"" 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 31 32 "#$%&'()*+,-./012" 33 34 35 36 37 "34567 " 18:38:37: ipdptp0 Recv: Internet Protocol Packet ff 03 00 21 45 00 00 54 ec 77 40 00 ff 01 f3 06 "...!E..T.w@....." 81 9d cc b1 81 9d cc 3d 00 00 01 4d 02 51 00 00 ".......=...M.Q.." 2f ba 26 8d 00 01 bb 16 08 09 0a 0b 0c 0d 0e 0f "/.&............." 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f "................" 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f ".!"#$%&'()*+,-./" 30 31 32 33 34 35 36 37 "01234567 " 18:38:38: ipdptp0 Send: Internet Protocol Packet 21 45 00 00 54 86 e2 40 00 ff 01 58 9c 81 9d cc "!E..T..@...X...." 3d 81 9d cc b1 08 00 3f 98 02 51 00 01 2f ba 26 "=......?..Q../.&" 8e 00 02 74 c8 08 09 0a 0b 0c 0d 0e 0f 10 11 12 "...t............" 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 21 22 "..............!"" 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 31 32 "#$%&'()*+,-./012" 33 34 35 36 37 "34567 " |
Trace Example 5 -- Dump of Successful telnet Session
The following example trace shows a dump of the PPP frames exchanged during the successful execution of a telnet(1) command over an established PPP link:
18:40:44: ipdptp0 Send: Internet Protocol Packet 21 45 00 00 2c 86 ee 40 00 ff 06 58 b3 81 9d cc "!E..,..@...X...." 3d 81 9d cc b1 80 35 00 17 94 b9 9a 00 00 00 00 "=.....5........." 00 60 02 22 38 2a be 00 00 02 04 05 b4 ".`."8*....... " 18:40:44: ipdptp0 Recv: Internet Protocol Packet ff 03 00 21 45 00 00 2c ec 84 40 00 ff 06 f3 1c "...!E..,..@....." 81 9d cc b1 81 9d cc 3d 00 17 80 35 93 e9 98 00 ".......=...5...." 94 b9 9a 01 60 12 22 38 fe c2 00 00 02 04 05 b4 "....`."8........" 18:40:44: ipdptp0 Send: VJ Uncompressed TCP/IP Packet 2f 45 00 00 28 86 ef 40 00 ff 00 58 b6 81 9d cc "/E..(..@...X...." 3d 81 9d cc b1 80 35 00 17 94 b9 9a 01 93 e9 98 "=.....5........." 01 50 10 22 38 16 80 00 00 ".P."8.... " 18:40:44: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 10 17 5c ff fd 03 ff fb 18 "-..\...... " 18:40:44: ipdptp0 Recv: VJ Uncompressed TCP/IP Packet ff 03 00 2f 45 00 00 28 ec 85 40 00 ff 00 f3 1f ".../E..(..@....." 81 9d cc b1 81 9d cc 3d 00 17 80 35 93 e9 98 01 ".......=...5...." 94 b9 9a 07 50 10 22 32 16 80 00 00 "....P."2.... " 18:40:45: ipdptp0 Recv: VJ Compressed TCP/IP Packet ff 03 00 2d 12 fe 70 06 ff fd 18 "...-..p.... " 18:40:45: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 0c 16 77 03 06 "-..w.. " 18:40:45: ipdptp0 Recv: VJ Compressed TCP/IP Packet ff 03 00 2d 1f 26 52 ff fb 03 ff fa 18 01 ff f0 "...-.&R........." 18:40:45: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 14 e4 8d 09 ff fa 18 00 53 55 4e 2d 43 4d 44 "-........SUN-CMD" ff f0 ".. " 18:40:45: ipdptp0 Recv: VJ Compressed TCP/IP Packet ff 03 00 2d 0c 16 61 0d 09 "...-..a.. " 18:40:46: ipdptp0 Recv: VJ Compressed TCP/IP Packet ff 03 00 2d 10 7f a0 ff fb 01 ff fd 01 0d 0a 0d "...-............" 0a 55 4e 49 58 28 72 29 20 53 79 73 74 65 6d 20 ".UNIX(r).System." 56 20 52 65 6c 65 61 73 65 20 34 2e 30 20 28 62 "V.Release.4.0.(b" 6c 6f 6e 64 65 29 0d 0a 0d 00 0d 0a 0d 00 "londe)........ " 18:40:46: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 1c 18 1d 37 0d ff fd 01 ff fc 01 "-...7....... " 18:40:46: ipdptp0 Recv: VJ Compressed TCP/IP Packet ff 03 00 2d 1c b4 01 06 37 6c 6f 67 69 6e 3a 20 "...-....7login:." 18:40:46: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 0c 16 1d 07 06 "-..... " 18:40:46: ipdptp0 Recv: VJ Compressed TCP/IP Packet ff 03 00 2d 1f 15 13 ff fe 01 "...-...... " 18:40:46: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 04 16 1a 03 "-.... " 18:40:53: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 10 a4 10 72 "-...r " 18:40:53: ipdptp0 Recv: VJ Compressed TCP/IP Packet ff 03 00 2d 1c a4 0f 01 03 72 "...-.....r " 18:40:53: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 0b 16 18 "-... " 18:40:54: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 10 a7 0e 6f "-...o " 18:40:54: ipdptp0 Recv: VJ Compressed TCP/IP Packet ff 03 00 2d 1b a7 0d 6f "...-...o " 18:40:54: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 0b 16 16 "-... " 18:40:54: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 10 a7 0c 6f "-...o " 18:40:54: ipdptp0 Recv: VJ Compressed TCP/IP Packet ff 03 00 2d 1b a7 0b 6f "...-...o " 18:40:55: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 0b 16 14 "-... " 18:40:55: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 10 a2 0a 74 "-...t " 18:40:56: ipdptp0 Recv: VJ Compressed TCP/IP Packet ff 03 00 2d 1b a2 09 74 "...-...t " 18:40:56: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 0b 16 12 "-... " 18:40:59: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 10 09 08 0d 00 "-..... " 18:40:59: ipdptp0 Recv: VJ Compressed TCP/IP Packet ff 03 00 2d 1c 08 fc 02 01 0d 0a "...-....... " 18:40:59: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 0b 16 0e "-... " 18:40:59: ipdptp0 Recv: VJ Compressed TCP/IP Packet ff 03 00 2d 1f 2e 33 50 61 73 73 77 6f 72 64 3a "...-..3Password:" 20 ". " 18:40:59: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 04 16 04 0a "-.... " 18:45:46: ipdptp0 Recv: Internet Protocol Packet ff 03 00 21 45 00 00 28 ec 92 40 00 ff 06 f3 12 "...!E..(..@....." 81 9d cc b1 81 9d cc 3d 00 17 80 35 93 e9 98 5e ".......=...5...^" 94 b9 9a 20 50 11 22 38 16 03 00 00 "....P."8.... " 18:45:46: ipdptp0 Send: VJ Compressed TCP/IP Packet 2d 04 16 03 01 "-.... " 18:45:46: ipdptp0 Send: Internet Protocol Packet 21 45 00 00 28 87 02 40 00 ff 06 58 a3 81 9d cc "!E..(..@...X...." 3d 81 9d cc b1 80 35 00 17 94 b9 9a 20 93 e9 98 "=.....5........." 5f 50 11 22 38 16 02 00 00 "_P."8.... " 18:45:46: ipdptp0 Recv: VJ Compressed TCP/IP Packet ff 03 00 2d 2c 16 02 01 0b 02 "...-,..... " |
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