AIX

HI ,

I am actually having a network problem with my p610 - AIX 5.2 ML7 . I have two integrated network card en0 and en1 ..en0 with ip 10.10.0.191 and en1 10.10.0.192. When i removed the network cable from en0 , i can't continue to ping en1(10.10.0.192) correctly. It is behaving as if en0 is controlling en1.

I would appreciate if someone could help me.

Thanks and Regards.

Are you sure you pulled the wire from en0?
What does errpt say?

yes, sure my friend i have removed the cable. errpt : - Ethernet down en0. And when try to ping en1 i start having request time out .

But if i remove en1 i can continue pinging en0. It's only when removing en0 that i can't continue pinging en1

Seems to be a problem of routing. Perhaps you had the default route through en0.
Notice both interfaces are in the same network.
Post the output of

Code:

netstat -rn

after and before pulling the cable, and let's see.
Regards.

thanks for your reply.
***************
please see output before pulling cable from en0 .

# netstat -rn
Routing tables
Destination Gateway Flags Refs Use If PMTU Exp Groups

Route Tree for Protocol Family 2 (Internet):
default 10.10.10.10 UGc 0 0 en1 - - =>
default 10.10.10.10 UGc 0 0 en0 - -
10/8 10.10.0.191 U 5 15007 en0 - - =>
10/8 10.10.0.192 U 2 9670 en1 - -
10.10.0.191 127.0.0.1 UGHS 0 0 lo0 - -
10.10.0.192 127.0.0.1 UGHS 9 131 lo0 - -
127/8 127.0.0.1 U 3 18153 lo0 - -

Route Tree for Protocol Family 24 (Internet v6):
::1 ::1 UH 0 0 lo0 16896 -


****************

Please see output after pulling cable from en0:-

# netstat -rn
Routing tables
Destination Gateway Flags Refs Use If PMTU Exp Groups

Route Tree for Protocol Family 2 (Internet):
default 10.10.10.10 UGc 0 0 en1 - - =>
default 10.10.10.10 UGc 0 0 en0 - -
10/8 10.10.0.191 U 5 15167 en0 - - =>
10/8 10.10.0.192 U 3 9864 en1 - -
10.10.0.191 127.0.0.1 UGHS 0 0 lo0 - -
10.10.0.192 127.0.0.1 UGHS 9 131 lo0 - -
127/8 127.0.0.1 U 3 18153 lo0 - -

Route Tree for Protocol Family 24 (Internet v6):
::1 ::1 UH 0 0 lo0 16896 -

This is normal AIX behavior. When you place two adapters on the same subnet, AIX does not route traffic across the adapters based on the adapter from which the traffic originated. Outbound traffic is sent across the first available adapter on that subnet, in this case en0. But since you've removed the physical wire, there is no connectivity.

You really don't want your system set up this way anyway. You're trying up to IP addresses for no good reason. What you really want to do is etherchannel en0 and en1 into either a active/failover or aggregate etherchannel, which would become en2. You then place the single IP address on en2.

Be sure to work with your network people on this one, because they will have to do port grouping on the network switch so that the switch handles the two physical lines as one logincal connection.

______________________
pSeries Tech Talk
Where pSeries professionals gather

Thanks a lot for your reply.

But the problem is that my customer is using Veritas MultiNIC.. to do the failover ...