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Etherchannel - Linux bonding driver

jonathan.wilson
Level 1
Level 1

Hello,

I'm trying to get a new Linux box (RHES4) connected to a pair of 3750 switches in a stack via two gigE in an Etherchannel. One of the gigE's is on each of the 3750s.

On Linux the interface bond0 gets set up using eth0 and eth1 as slaves. However, I've tried various bonding "modes" and the best I can do is create an Etherchannel where one gigE is on standby waiting for the first to go down.

The Linux /etc/modules.conf contains:

alias bond0 bonding

options bonding miimon=100 mode=2

The 3750 switch contains:

int port-channel6

switchport mode access

int gi1/0/15

switchport mode access

channel-group 6 mode active

int gi2/0/9

switchport mode access

channel-group 6 mode active

What combination of modes on the switch and Linux will let me use both gigE in load balanced and yet failure tolerant way?

Regards,

Jonathan Wilson

3 Replies 3

scottmac
Level 10
Level 10

What kind of NICs are you using?

Some may only support primary/secondary modes.

Let us know

Scott

Scott,

Built-in NICs on an HP BL25p - HP calls them "NC370i". They use the 'tg3' driver. They appear to be a Broadcom 5700 chipset.

Thanks,

Jonathan

Whoops, those are NC7781 NICs, not NC370i's.

Thanks

Jonathan

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