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09-23-2009 08:00 PM
09-23-2009 08:00 PM
Problem with Flex-10 NIC team accessing internet
FlexNIC 1 + FlexNIC 2
| |
VC Flex10 A - VC Flex10 B
| |
VC 1/10 A - VC 1/10 - B
|
PC 6248 A - PC 6249 - B (stacked)
|
PC 2448
|
Cisco RVS 4000
|
Comcast Cable Modem
The problem I'm having is when the NIC team is in place I can't hardly do anything with the internet. I can access everything on the internal network no matter which switch it's connected to (other blades, servers off 6248 and servers off 2448). I've verified that jumbo frames are not turned on for the NIC team. The team was originally configured as a TLB load balancing. If I switch that to fault tolerance load balancing than everything works fine. Is this some kind of issue with needing to turn on spanning tree (RSTP) on for the RVS4000 or something if I'm in a TLB scenario?
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09-24-2009 04:18 AM
09-24-2009 04:18 AM
Re: Problem with Flex-10 NIC team accessing internet
When teaming 2 NICs together in TLB, one is designated as the primary which will TX and RX and one is designated as the secondary which will TX Only. All communication to the NIC team will go to the TX/RX NIC's MAC Address. When the NIC team is sending traffic out it will balance the traffic between the TX/RX NIC and the TX Only NIC using various algorithms. When the TX Only NIC is used for transmit, it will use its own burnt-in MAC Address as the source address for those frames instead of the NIC Team MAC Address. Maybe the RVS4000 device sees this communication as a security violation OR maybe the RVS 4000 is trying to respond back to the TX Only MAC Address (which the NIC Team will ignore).
THere is probably not much you can do to resolve this other than to not use TLB or maybe there is some settings you can manipulate on the Cisco RVS 4000 device.
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09-24-2009 05:51 AM
09-24-2009 05:51 AM
Re: Problem with Flex-10 NIC team accessing internet
What are you guys using for your NIC teaming algorithm on FlexNICs?
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09-24-2009 09:18 AM
09-24-2009 09:18 AM
Re: Problem with Flex-10 NIC team accessing internet
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09-24-2009 11:37 AM
09-24-2009 11:37 AM
Re: Problem with Flex-10 NIC team accessing internet
You might try a static IP to MAC address entry.
Map the IP address of the team to the team MAC Address on the RVS4000. That might work.
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09-24-2009 09:22 PM
09-24-2009 09:22 PM
Re: Problem with Flex-10 NIC team accessing internet
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12-22-2009 11:34 AM
12-22-2009 11:34 AM
Re: Problem with Flex-10 NIC team accessing internet
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12-23-2009 03:36 AM
12-23-2009 03:36 AM
Re: Problem with Flex-10 NIC team accessing internet
If you are connecting to stacked switches and you have a port trunk/lacp/etherchannel on the stack but going to more than one VC module then it will only make active the paths to one VC module. The others will be standby.
You cannot port truck accross two different VC.
You have to create two different port trunks - one to each VC.
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12-23-2009 07:23 AM
12-23-2009 07:23 AM
Re: Problem with Flex-10 NIC team accessing internet
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03-05-2010 06:54 AM
03-05-2010 06:54 AM