More details

[Aniruddha Bohra]

Hello
    Using the same configuration as my previous message to the list
but adding several print statements, I have the following info :
Host 0 is on eth1 subnet - sends a SYN - which never reaches the Host1 
on eth2
which however reaches at least the ARPQuerier (Out on eth2 printf).

One thing to note is that the incoming packet is 60 bytes while the 
outgoing packet is 58.


/var/log/messages says
Jun 18 20:51:31 hora-7 kernel: chatter: eth1 IP:   60 | 000476df 
ce580010 4200827c 08004510 002c0042 40004006
Jun 18 20:51:31 hora-7 kernel: chatter: Forward to eth2:   44 | 4510002c 
00424000 400601b8 0a0a0a0e c0a86402 04140017
Jun 18 20:51:31 hora-7 kernel: chatter: Out on eth2:   58 | 00104200 
827d0004 76dd2978 08004510 002c0042 40003f06
Jun 18 20:51:31 hora-7 kernel: chatter: Out on eth2:   42 | ffffffff 
ffff0004 76dd2978 08060001 08000604 00010004
Jun 18 20:51:31 hora-7 kernel: chatter: Local delivery:   60 | 000476dd 
29780010 4200827d 08060001 08000604 00020010
Jun 18 20:51:34 hora-7 kernel: chatter: eth1 IP:   60 | 000476df 
ce580010 4200827c 08004510 002c0043 40004006
Jun 18 20:51:34 hora-7 kernel: chatter: Forward to eth2:   44 | 4510002c 
00434000 400601b7 0a0a0a0e c0a86402 04140017
Jun 18 20:51:34 hora-7 kernel: chatter: Out on eth2:   58 | 00104200 
827d0004 76dd2978 08004510 002c0043 40003f06
Jun 18 20:51:40 hora-7 kernel: chatter: eth1 IP:   60 | 000476df 
ce580010 4200827c 08004510 002c0044 40004006
Jun 18 20:51:40 hora-7 kernel: chatter: Forward to eth2:   44 | 4510002c 
00444000 400601b6 0a0a0a0e c0a86402 04140017
Jun 18 20:51:40 hora-7 kernel: chatter: Out on eth2:   58 | 00104200 
827d0004 76dd2978 08004510 002c0044 40003f06

tcpdump on host 0 says :
[root at ghoomar0 root]# tcpdump -i eth1
tcpdump: listening on eth1
19:52:16.467224 10.10.10.14.1044 > 192.168.100.2.telnet: S 
3629135766:3629135766(0) win 5632 <mss 1460> (DF) [tos 0x10]
19:52:19.458799 10.10.10.14.1044 > 192.168.100.2.telnet: S 
3629135766:3629135766(0) win 5632 <mss 1460> (DF) [tos 0x10]
19:52:25.458798 10.10.10.14.1044 > 192.168.100.2.telnet: S 
3629135766:3629135766(0) win 5632 <mss 1460> (DF) [tos 0x10]

tcpdump on host 1 says :
[root at ghoomar1 root]# tcpdump -i eth1
tcpdump: listening on eth1
20:55:32.978911 arp who-has 192.168.100.2 tell 192.168.100.1
20:55:32.978923 arp reply 192.168.100.2 is-at 0:10:42:0:82:7d

Is there any more information I can provide to identify the problem ?

Thanks
Aniruddha