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02-15-2010 09:14 AM
02-15-2010 09:14 AM
Probem with Teaming
Hi all ¡¡
I'm trying to install a teaming with a 5500g fabric.
In the 5500g i have lacp enabled in all the ports and spanning tree(rapid).
If i have the 2 NICs conected to the fabric the ping does'nt works.
If i have only one of the 2 NICs in one of the unit of the fabric
the ping works...
Anyone can explain me how to conect a teaming with a fabric please?
Its a broadcom teaming.
Thanks all and sorry to my bad english.
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02-15-2010 11:17 AM
02-15-2010 11:17 AM
Re: Probem with Teaming
For use Teaming in the NIC`s server and connect to switch in fabric, you do not need enable in the port LACP, only connect in both port. I use LACP when connect between switchs only.
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02-15-2010 12:15 PM
02-15-2010 12:15 PM
Re: Probem with Teaming
And it works fine?? Spanning tree not cut one of the conections?
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02-16-2010 02:50 PM
02-16-2010 02:50 PM
Re: Probem with Teaming
Of course, the teaming work well. Spanning tree is more used for Links between Switchs, when you have several paths. The control of trafic is in the NIC, if you setting is Load Balancing in the Teaming, both ports in the NIC TX/RX date through the switch.
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02-18-2010 09:43 AM
02-18-2010 09:43 AM
Re: Probem with Teaming
The correct method to implement teaming (NIC aggregation) using a 5500G-EI switch is creating a static link-aggregation group and assign it to the ports where the server NICs are connected:
link-aggregation group 1 mode static
link-aggregation group 1description SERVER_TEAMING_XYZ
interface giga 1/0/X
port link-aggregation group 1
interface giga 1/0/Y
port link-aggregation group 1
Remember that the ports need to be configured exactly in the same way, only the interface description can be different.
In a scenario of teaming (NIC aggregation with bandwidth increase) If you just connect the NICs to the switch you could force the switch to start a re-learning in the MAC table, what causes high utilization of CPU and memory resources. This occus because the teaming announces a virtual MAC and IP address, but the switch still learns the real MAC addresses from the NICs, binding these real MAC addresses to the virtual IP also, what it means to the switch that there's duplicate MAC addresses with the same IP.
This scenario is different when using failover in the server, when doesn't make difference if the ports are with a link-aggregation group or not.
HTH
Fred Mancen