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тАО02-18-2002 06:50 AM
тАО02-18-2002 06:50 AM
Network Load Balancing
Hello every body!
I need your help urgently! I am trying to configure NLB in two servers that play the role of Smtp Servers. They forward the messages from the internal Exchange Server to Internet. I am having a lot of problems because the machines are connected to a switch, and this is what occurs: only one Nlb node can relay messages to Internet (the one with the less number from 1 to 32)and the other one can only go out when the first node is down. I have configured both nodes to work 50%/50%, and Nlb shares the messages between both nodes, but only one can go out to Internet. I have also noticed that the switch sees different Mac Adresses for both nodes, besides from each node, when you run Ipconfig /all, you can see the same. These masc adresses aren??t the physical adresses of the network cards without Nlb.
Can you help me????
I don??t have more ideas. I have tried to put a hub between the two Nlb Servers and the switch but it goes the same.
Thank you very much.
Regards,
Marta
I need your help urgently! I am trying to configure NLB in two servers that play the role of Smtp Servers. They forward the messages from the internal Exchange Server to Internet. I am having a lot of problems because the machines are connected to a switch, and this is what occurs: only one Nlb node can relay messages to Internet (the one with the less number from 1 to 32)and the other one can only go out when the first node is down. I have configured both nodes to work 50%/50%, and Nlb shares the messages between both nodes, but only one can go out to Internet. I have also noticed that the switch sees different Mac Adresses for both nodes, besides from each node, when you run Ipconfig /all, you can see the same. These masc adresses aren??t the physical adresses of the network cards without Nlb.
Can you help me????
I don??t have more ideas. I have tried to put a hub between the two Nlb Servers and the switch but it goes the same.
Thank you very much.
Regards,
Marta
3 REPLIES 3
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тАО02-20-2002 08:15 AM
тАО02-20-2002 08:15 AM
Re: Network Load Balancing
hi,
what type of switch do you have? You should not only enable load balancing function on the NICs but also 2 ports of the switch. Could be named like load-balancing, port-trunking, FastEtherChannel (FEC) or similar.
hth
robert
what type of switch do you have? You should not only enable load balancing function on the NICs but also 2 ports of the switch. Could be named like load-balancing, port-trunking, FastEtherChannel (FEC) or similar.
hth
robert
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тАО03-04-2002 06:04 AM
тАО03-04-2002 06:04 AM
Re: Network Load Balancing
Hi Robert,
Could you explain it to me, please?
I dont know the exact model of the switch, I think it is a Cisco Catalist 5500 (is this possible?). I would try to get the model exactly. Do I have to configure something in the switch? Can you explain it to me more slowly, please?
Thank you very much for your help.
Marta
Could you explain it to me, please?
I dont know the exact model of the switch, I think it is a Cisco Catalist 5500 (is this possible?). I would try to get the model exactly. Do I have to configure something in the switch? Can you explain it to me more slowly, please?
Thank you very much for your help.
Marta
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тАО03-06-2002 08:24 AM
тАО03-06-2002 08:24 AM
Re: Network Load Balancing
marta,
be careful if you are not sure what to do in the switch config, better ask your switch-admin. But if you are interested in configuring "etherchannel" on Cisco 5000serie you should go to
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat5000/rel_6_3/config/channel.htm
there you can find the info needed (i hope so)
hth
robert
be careful if you are not sure what to do in the switch config, better ask your switch-admin. But if you are interested in configuring "etherchannel" on Cisco 5000serie you should go to
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat5000/rel_6_3/config/channel.htm
there you can find the info needed (i hope so)
hth
robert
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