RES: AIX With 3 Network Adapters (Was: No Subject)

Daniel, 

  Since it's not possible to have multiple default gateways, you could
probably define explicit routes to each of your subnets using the
appropriate ip address/gateway for each of the adapters


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Paul Gondim van Dongen
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-----Mensagem original-----
De: Daniel Sparrman [mailto:daniel.sparrman AT EXIST DOT SE] 
Enviada em: Friday, January 17, 2003 9:29
Para: ADSM-L AT VM.MARIST DOT EDU
Assunto: 


Hi

Thanks for the respone.

Yes, all clients are located in different subnets. Some of the clients are
connected through the same IP subnet, but most of them are on different
subnets.

Running only the GB adapter wont be enough. There is approx. 150 TSM
clients, and they are located on 6 different subnets.

The problem is that if we use the default gateway on the GB adapter(or any
other adapter), the switch will flood. This is because the switch is using
"Spanning Tree". What it reallys means is, that if a client connects to the
TSM server on one of the two 100Mbs ethernet adapters, and the TSM server
responds on the GB adapter(which have the default gateway), the Cisco switch
wont like it, as it keeps track of the mac-address within the packet. When
the TSM server responds, it will respond with the mac-address of the GB
adapter, instead of the original mac-address from the 100Mbs Ethernet
adapter. This causes the switch to get schizofrenic, as it sends one packet
to one mac-address, but recieves a respone from another mac-address...

This is solved in AIX 5L, which have the possibility to have multiple
default gateways bound to different network interfaces. This means that if
you have three adapters, you can have 3 different default gateways, one for
each adapter.

The question was if somebody has been able to solve this on a lower level of
AIX, such as ML 4.3.3.09.

Best Regards

Daniel Sparrman


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