Re: trouble configuring two ethernet adapters AIX 5.2

...there doesn't seem to be enough info to work with there. We don't have
an IP for renoir, no lsattr output from anything....entstat -d on ent0 and
ent2 would help in troubleshooting.

...also, what is the need for a separate adapter? Do you just need that
other IP on the network? How about creating an alias for it.

Tried running tcpdump when your having problems? You'll likely be in a
"round-robin" configuration for outgoing traffic when you online the second
adapter (as you are in the same subnet w/ both adapters). BUT....if there
is a problem w/ the other adapter, every bit of traffic that gets directed
it's way will have a problem.

Looked at errpt? I'm surprised in my day to day work how much the basic
logs are overlooked (errpt will report on a good many network issues that
most unices will leave you tracking down switch logs to help figure
out....).

Frank

On Nov 5, 2007 9:45 AM, Enrique Sanchez Vela <esanchezvela@xxxxxxxxx> wrote:

well, is the network adapter configured at the right
speed? full-duplex?, is the network port active and
configured on the right vlan?

best regards,
Enrique.



--- Mark Schlechte <mschlechte@xxxxxxxxx> wrote:

Sorry, no help here but it looks like you having the
same sort of problem I had.
I haven't had time to try and look at this in any
more detail but the systems are exactly the same.

Mark

Paul Deveau <pdeveau@xxxxxxxxxx> 01/Nov/2007
1:14 pm >>>
Hi,

I am having problems configuring two Ethernet
adapters. When I configure
the second adapter I lose some connectivity with the
first adapter. When
I down and detach the second adapter my connectivity
returns. There are
some static routes.

Any ideas? Thanks.


1.
# netstat -r
Routing tables
Destination Gateway Flags Refs
Use If PMTU Exp
Groups

Route Tree for Protocol Family 2 (Internet):
default 172.20.21.1 UG 2
232043 en0 - -
127/8 loopback U 5
1119 lo0 - -
172.20.16.0 renoir UHSb 0
0 en0 - -
=>
172.20.16/21 renoir U 2
5697 en0 - -
renoir loopback UGHS 6
152 lo0 - -
172.20.23.255 renoir UHSb 0
47 en0 - -


2.
# ifconfig en2 172.20.21.55 netmask 255.255.248.0
broadcast
172.20.23.255

3.
# netstat
-r


Routing tables
Destination Gateway Flags Refs
Use If PMTU Exp
Groups

Route Tree for Protocol Family 2 (Internet):
default 172.20.21.1 UG 2
232332 en0 - -
127/8 loopback U 6
1119 lo0 - -
172.20.16.0 renoir UHSb 0
0 en0 - -
=>
172.20.16.0 172.20.21.55 UHSb 0
0 en2 - -
=>
172.20.16/21 renoir U 2
5758 en0 - -
=>
172.20.16/21 172.20.21.55 U 0
0 en2 - -
172.20.21.55 loopback UGHS 0
0 lo0 - -
renoir loopback UGHS 6
152 lo0 - -
172.20.23.255 renoir UHSb 0
47 en0 - -
=>
172.20.23.255 172.20.21.55 UHSb 0
0 en2 - -


4.
# ifconfig en2 down
# ifconfig en2 detach
# netstat -r
Routing tables
Destination Gateway Flags Refs
Use If PMTU Exp
Groups

Route Tree for Protocol Family 2 (Internet):
default 172.20.21.1 UG 4
232342 en0 - -
127/8 loopback U 5
1119 lo0 - -
172.20.16.0 renoir UHSb 0
0 en0 - -
=>
172.20.16/21 renoir U 2
5836 en0 - -
renoir loopback UGHS 6
152 lo0 - -
172.20.23.255 renoir UHSb 0
47 en0 - -

Thanks.

Paul Deveau
University of Ottawa


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