I've plugged 2 ports from a Dell server that are teamed and the switch console keeps saying both ports are flapping, what does this mean? Both ports at both ends are configured as speed 1000 and full duplex.
I haven't got access to the switch while I type this, but I know the ports have the following enabled:
flowcontrol receive on
The Dell NICs are configured with jumbo frames (mtu 9000)
We've tried all the different modes on the card but still get the same flapping errors. Dell said we don't need to set anything on the Cisco switch as the Dell NIC should do all the work, maybe we need to?
Lets assume that the server lives on Vlan 25. And that ther switches are stacked so Im using ports G1/0/1 & G2/0/1
For fault tolerance mode ( Worker/Standby)
! int Gi1/0/1 shut desc *** SeRver Eth 1 *** switchport host switchport access vlan 25 no shut ! ! int Gi2/0/1 shut desc *** SeRver Eth 2 *** switchport host switchport access vlan 25 no shut !
For fault Network Load Balancing mode ( Worker/Worker)
This will automatically buils the ether channel ( I have used 25 to match the VLAN)
! int Gi1/0/1 shut desc *** SeRver Eth 1 *** switchport access switchport access vlan 25 channel-group 25 mode active spanning-tree portfast no shut ! ! int Gi2/0/1 shut desc *** SeRver Eth 2 *** switchport access switchport access vlan 25 channel-group 25 mode active spanning-tree portfast no shut !
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