Bonding ethernet interfaces on different layer 2 - vlans

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Hallo,

With 2 servers with two nic for interconnect, each nic has its own dedicated switch and vlan for each server,

I am wondering if it is possible to bond in mode 1 (a/b) those two nics, says eth0 and eth1, in a layer 2 vlan on different switches to use them as interconnect.

Thanks in advice,

edm

Vd
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Responses

Jamie Bainbridge's picture Red Hat Guru 7257 points
24 August 2015 10:49 PM

If the two bonding slaves connect into the same broadcast domain, it's a valid config:

+------+       +------+
| SW1  ==trunk== SW2  |
|VLAN10|       |VLAN10|
+--+---+       +--+---+
   |              |    
   |              |    
   |              |    
+--+---+       +--+---+
| eth0 |       | eth1 |
+------+-------+------+
|bond0 (active backup)|
+---------------------+

If the two bonding slaves are in different broadcast domains, that is wrong:

+------+       +------+
| SW1  |       | SW2  |
|VLAN10|       |VLAN20|
+--+---+       +--+---+
   |              |    
   |              |    
   |              |    
+--+---+       +--+---+
| eth0 |       | eth1 |
+------+-------+------+
|bond0 (active backup)|
+---------------------+
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