[ale] network problem

[Dow Hurst]

Run an "arp -a" on both boxes after trying from both boxes to ping each 
other.  If you don't have ARP entries for each machine in each others 
arp tables it may show a local switch or hub incompatibility with your 
bonding situation.  This is a lower level diagnostic for seeing if your 
MAC addresses are propagating between these two machines.  They should 
register each other's MAC address so the icmp packets will be passed to 
the right machine on your local LAN by the switch in between them.  Or, 
if you have a hub then the machines will just grab the packets addressed 
to them up off the wire.  If the MAC addresses are not propagating then 
you have a interface configuration problem maybe at the driver level 
that might be able to be corrected by adding an option to your driver 
when it is loaded into the kernel.  An example would be putting an 
option on a 3Com driver to tell it to be either full duplex or half 
duplex.  So finding out what the options are for each of your cards and 
the bonding driver would be handy at that point.  Try the arp -a after 
pinging and let us know if you have those addresses registered properly.
Dow


ChangingLINKS.com wrote:

>This is the computer that worked with NFS and works perfectly. I have made no 
>changes to it. The results below are for the client. The other was the server 
>(with 2 nic cards).
>
>
>eth0      Link encap:Ethernet  HWaddr 00:0A:E6:4D:45:A2
>          inet addr:192.168.123.121  Bcast:192.168.123.255  Mask:255.255.255.0
>          inet6 addr: fe80::20a:e6ff:fe4d:45a2/10 Scope:Link
>          UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500  Metric:1
>          RX packets:605 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:466 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:100
>          RX bytes:602269 (588.1 Kb)  TX bytes:38820 (37.9 Kb)
>          Interrupt:11 Base address:0xd400
>
>lo        Link encap:Local Loopback
>          inet addr:127.0.0.1  Mask:255.0.0.0
>          inet6 addr: ::1/128 Scope:Host
>          UP LOOPBACK RUNNING  MTU:16436  Metric:1
>          RX packets:60 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:60 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:0
>          RX bytes:3912 (3.8 Kb)  TX bytes:3912 (3.8 Kb)
>
>sit0      Link encap:IPv6-in-IPv4
>          NOARP  MTU:1480  Metric:1
>          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:0
>          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
>
>Kernel IP routing table
>Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
>192.168.123.0   0.0.0.0         255.255.255.0   U     0      0        0 eth0
>0.0.0.0         192.168.123.120 0.0.0.0         UG    0      0        0 eth0
>
>
>
>On Saturday 15 February 2003 1:11 pm, John Wells wrote:
>  
>
>>Post the output of running 'ifconfig -a' and 'route -n' on both machines.
>>
>>John
>>
>>ChangingLINKS.com said:
>>    
>>
>>>I added two nics to my server.
>>>
>>>Now the clients cannot ping the server. The server cannot ping the
>>>clients.  The server can ping yahoo, the clients can ping each other.
>>>What do I do? I don't even know where to start. I ran a netstat -i, but
>>>I  don't even know what I am looking at.
>>>--
>>>Wishing you Happiness, Joy and Laughter,
>>>Drew Brown
>>>http://www.ChangingLINKS.com
>>>_______________________________________________
>>>Ale mailing list
>>>Ale at ale.org
>>>http://www.ale.org/mailman/listinfo/ale
>>>      
>>>
>>
>>_______________________________________________
>>Ale mailing list
>>Ale at ale.org
>>http://www.ale.org/mailman/listinfo/ale
>>
>>
>>    
>>
>
>  
>

-- 
__________________________________________________________
Dow Hurst                  Office: 770-499-3428
Systems Support Specialist    Fax: 770-423-6744
1000 Chastain Rd., Bldg. 12
Chemistry Department SC428  Email:dhurst at kennesaw.edu
Kennesaw State University         Dow.Hurst at mindspring.com
Kennesaw, GA 30144
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*Computational Chemistry is fun!*
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