Bonding two bond interfaces

[Brem Belguebli]

Hi,

Has anyone already tried to build a bond (mode 0) of 2 bonds (mode 4) interfaces.

My need is to have a 2 * 1 Gbs bond interface (mode 4) which could switch to the other 2 * 1 Gbs interface in case one of the links of the first interface came to fail or if the switch connected to came to fail.

I need to guarantee a 2Gbs live bandwitdh.

Topology :

bond2
|
----------
/ mode=0 \
/ \
bond0 bond1
| | mode=4 | | mode=4
eth0 eth1 eth2 eth4
| | PAGP | | PAGP
switch 1 switch 2

Thanks

[Court Campbell]

you can't bond bonds. You could add all four interfaces to a single bond.

[Brem Belguebli]

Hi,

It won't work in my configuration as each couple of cards (bond0 and bond1) is connected to a dedicated CISCO switch and there is etherchanneling (or trunking for non-CISCO) activated (bond mode 4).
You cannot bond (mode 4) when connected to different switches.

[Court Campbell]

It may not work in your configuration, but it can be done.

[Brem Belguebli]

I do not doubt it would, but we needto address two points:

1- Provide live 2 Gbs bandwidth
2- being connected to 2 different switches in case one fails.

The question is : Is it possible to mix both mode 0 and mode 4 in the same bonding interface ?

I'm not sure it is possible.

Regards

[Court Campbell]

it's not possible.