| cranium2004 |
05-20-2005 08:48 PM |
pinging problem
Hello,
Please i require help from you peoples. I am running ethereal on linux on pcs with pc1 with ip address=192.18.1.250 and pc2 with ip=192.168.1.10. I am pinging from pc1 to p2 but sometimes packet goes normal way and sometimes i think frame corrupted. Following my capture analysis ON PC2. First Frame is corrupted why? frame5 correctly received.
what is the reason i am not able to receive frame correctly sometimes?
Does following packet makes entry in ifconfig anyalysis. I check but no counter increased on PC2. neither packet counted as RX packets nor dropped why?
Code:
eth1 Link encap:Ethernet HWaddr 00:08:A1:43:61:F5
inet addr:192.168.1.10 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:33 errors:0 dropped:0 overruns:0 frame:0
TX packets:29 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3494 (3.4 Kb) TX bytes:2246 (2.1 Kb)
Interrupt:9 Base address:0x9c00
No. Time Source Destination Protocol Info
1 0.000000 40:00:40:01:b6:54 45:00:00:54:00:00 0xc0a8 Ethernet II
Frame 1 (98 bytes on wire, 98 bytes captured)
Arrival Time: May 20, 2005 15:57:13.599959000
Time delta from previous packet: 0.000000000 seconds
Time since reference or first frame: 0.000000000 seconds
Frame Number: 1
Packet Length: 98 bytes
Capture Length: 98 bytes
Protocols in frame: eth:data
Ethernet II, Src: 40:00:40:01:b6:54, Dst: 45:00:00:54:00:00
Destination: 45:00:00:54:00:00 (45:00:00:54:00:00)
Source: 40:00:40:01:b6:54 (40:00:40:01:b6:54)
Type: Unknown (0xc0a8)
Data (84 bytes)
0000 45 00 00 54 00 00 40 00 40 01 b6 54 c0 a8 01 fa E..T..@.@..T....
0010 c0 a8 01 0a 08 00 df 9d 52 0e 00 01 22 bf 8d 42 ........R..."..B
0020 1e 4e 0d 00 08 09 0a 0b 0c 0d 0e 0f 10 11 12 13 .N..............
0030 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 21 22 23 ............ !"#
0040 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 31 32 33 $%&'()*+,-./0123
0050 34 35 36 37 00 00 00 00 00 00 00 00 00 00 00 00 4567............
0060 00 00 ..
Frame 5 (98 bytes on wire, 98 bytes captured)
Arrival Time: May 20, 2005 16:12:42.872068000
Time delta from previous packet: 177.629913000 seconds
Time since reference or first frame: 182.659884000 seconds
Frame Number: 5
Packet Length: 98 bytes
Capture Length: 98 bytes
Protocols in frame: eth:ip:icmp:data
Ethernet II, Src: 00:08:a1:43:62:91, Dst: 00:08:a1:43:61:f5
Destination: 00:08:a1:43:61:f5 (192.168.1.10)
Source: 00:08:a1:43:62:91 (CnetTech_43:62:91)
Type: IP (0x0800)
Internet Protocol, Src Addr: 192.168.1.250 (192.168.1.250), Dst Addr: 192.168.1.10 (192.168.1.10)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
0000 00.. = Differentiated Services Codepoint: Default (0x00)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 84
Identification: 0x0000 (0)
Flags: 0x04 (Don't Fragment)
0... = Reserved bit: Not set
.1.. = Don't fragment: Set
..0. = More fragments: Not set
Fragment offset: 0
Time to live: 64
Protocol: ICMP (0x01)
Header checksum: 0xb654 (correct)
Source: 192.168.1.250 (192.168.1.250)
Destination: 192.168.1.10 (192.168.1.10)
Internet Control Message Protocol
Type: 8 (Echo (ping) request)
Code: 0
Checksum: 0xdf9d (correct)
Identifier: 0x520e
Sequence number: 0x0001
Data (56 bytes)
0000 00 08 a1 43 61 f5 00 08 a1 43 62 91 08 00 45 00 ...Ca....Cb...E.
0010 00 54 00 00 40 00 40 01 b6 54 c0 a8 01 fa c0 a8 .T..@.@..T......
0020 01 0a 08 00 df 9d 52 0e 00 01 22 bf 8d 42 1e 4e ......R..."..B.N
0030 0d 00 08 09 0a 0b 0c 0d 0e 0f 10 11 12 13 14 15 ................
0040 16 17 18 19 1a 1b 1c 1d 1e 1f 20 21 22 23 24 25 .......... !"#$%
0050 26 27 28 29 2a 2b 2c 2d 2e 2f 30 31 32 33 34 35 &'()*+,-./012345
0060 36 37 67
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