You may need to look at more than one solution here. Please check if you can confirm that at LAN switch level the overall utilization of TSM port is higher than 85% AND if multiple TSM clients have backup problems because of 'network bottleneck' on TSM GigEth interface. Etherchannel and load balancing could be implemented at LAN switch level or at AIX host level or DNS server, but with different focuses. Before adding more NIC here and there, take a step back and try to gether as much information as possible. No one can do any better job than you do at your environment. Cheer!
Gus >>> [EMAIL PROTECTED] 03/29/05 12:23 AM >>> Hi, I don't know whether you can "merge" your two network adapter cards and associated ip into a logical channel called etherchannel might help you out. I know AIX supports etherchannel. Try smitty etherchannel to help you with the config. All the best -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] Behalf Of Justin Derrick Sent: Monday, March 28, 2005 10:13 PM To: ADSM-L@VM.MARIST.EDU Subject: Re: Using multiple Ethernet adapters on AIX TSM server? Hi Kevin. >I am currently using one GigE adapter on my TSM server, and I have so >much traffic coming into it during the night that I need to add another. >The new adatper will have a different IP, but will be on the same subnet >as the first one. I am not sure of the right / best way to configure >it. If you're maxing out your GigE connection, adding another line to it may just push the bottleneck upstream to the switch -- you'll want to work with your network folks to determine the best place to lay new pipes. >It's my understanding that provided this second adapter has its own IP >address, that I can specify that address in the dsm.opt file on certain >clients that I want to come in over that adapter. Correct? You've got the right idea. Again, depending on your traffic patterns (lots of small clients vs. a few huge clients) it might make sense to associate more IP addresses with the host name on your DNS server, and have DNS provide load balancing (by passing out IPs for the same hostname in a round-robin fashion). This is especially useful if it's the GigE that's the bottleneck to the switch. This is a good general-purpose fix, but to truly optimize your connectivity, you have to dig into your usage patterns to develop the best solution. You'll want to remove the bottleneck, not just push it upstream. =) >>From an AIX standpoint, do I set the default gateway for the new adapter >to be the same as the other one? Or do I make the first adapter the >default gateway for the second one? Depends on how you set up subnets. To specifically answer your second question, NO. =) - If you add the second IP to the *same* subnet, then they have the same gateway (possibly a bottleneck). - If you add the second IP to a *different* subnet, it may or may not (but it SHOULD, really) have a different gateway associated with it. -JD. This mail has originated from the Internet. The State Bank of Mauritius disclaims all liability as regards to its content. Please verify its source and content before acting thereon. The information contained in this e-mail message, and any attachment thereto, is confidential and may be disclosed without our express permission. If you are not the intended recipient or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that you have received this message in error and that any review, dissemination, distribution or copying of this message, or any attachment thereto, in whole or in part, is strictly prohibited. If you have received this message in error, please immediately notify us by telephone, fax or e-mail and delete the message and all of its attachments. Thank you. Every effort is made to keep our network free from viruses. You should, however, review this e-mail message, as well as any attachment thereto, for viruses. We take no responsibility and have no liability for any computer virus which may be transferred via this e-mail message.