ADSM-L

[no subject]

2003-01-17 05:03:44
From: Rodney clark <Rodney.Clark AT INGBANK DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Fri, 17 Jan 2003 09:52:06 -0000
Not really sure but you can force traffic via 1 interface by adding a
interface route.
Are the clients in a local subnet or are they behind the router ?
If behind the router why not simply use the gigabit adapter ? and remove the
10/100 adapters

-----Original Message-----
From: Daniel Sparrman [mailto:daniel.sparrman AT EXIST DOT SE]
Sent: Friday 17 January 2003 07:24
To: ADSM-L AT VM.MARIST DOT EDU
Subject: 


Hi

This is perhaps more of a communication question rather than a storage
management question, but I will still ask, considering some of you out
there should have encountered this problem.

One of our customers have a P-Series 610 running AIX ML 4.3.3.09. It's
equipped with 2 100Mbs Ethernet adapters and one GB adapter. Previously,
they all were located on the same subnet. Now, we've move the GB adapter
into a separate subnet.

The configuraiton looks like this:

1st 100Mbs Ethernet = 192.168.1.1/24     default gateway 192.168.1.254
2nd 100Mbs Ethernet = 192.168.1.2/24
1st Gigabit Ethernet = 192.168.5.1/24

This has become a problem. Everytime a client connects to the TSM server,
it responds from the adapter which have the default gateway set. The
customer is running spanning tree, which means that it wont allow the TSM
server to receive data on one adapter, and respond from another. However, I
haven't found a way to have the TSM server respond from the same adapter on
which the client connected. In my opinion, this can only be solved in to
ways; either having a default gateway for each adapter, or, setting some
kind of option, telling the TSM server to awalys respond on the same
adapter on which it received the data.

BUT, the first alternative doesnt work. AIX 4.3.3.09, in contrary to 5L,
wont let me set multiple default gateways, specifying one for each adapter.
In AIX 5L, I have the option, when setting static routes, of binding the
static route to a specific adapter. When trying to add a second default
gateway on AIX 4.3.3.09, it only tells me that there is already a default
gateway.

The second alternative, however, seems theoretically impossible. The AIX
server shouldnt be able to respond to a client, connection from a different
subnet, from the adapter on which it received the initial client session.
This is because the adapter dont have a default gateway, and therefore
shouldn't be able to find it's way to the client, located on a different
subnet.

This problem still existed when we had all adapters running on the same IP
subnet. The GB adapter could recieve data initiated from the clients, but
the respones always went through the first 100Mbs ethernet adapter, which
had the default gateway.

Is there anybody out there running an AIX server with multiple adapters,
which have multiple subnets, and has been able to have the AIX respond to
the client on the same adapter on which the client initially started the IP
session?

Perhaps I'm not a communication expert, but to me, this seems like a fairly
simple problem.

Best Regards

Daniel Sparrman
-----------------------------------
Daniel Sparrman
Exist i Stockholm AB
Propellervägen 6B
183 62 HÄGERNÄS
 Växel: 08 - 754 98 00
Mobil: 070 - 399 27 51

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