change mac on vmbr0

C

copymaster

Member
Nov 25, 2009
183
0
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hi.
i am using 802.3ad in my network, which seems to work if:

i manually change the mac of one servers vmbr0.

802.3ad depends on the mac address of the interface. unfortunately, my servers all have EVEN mac addresses, which leads to bad performance.

my server has 4 NICS in two bonds

one bond is directly used for iscsi network, changing of mac is easy. I just added a line in /etc/network/interfaces hwaddress ether ....

Code: 
auto bond0
iface bond0 inet static
        hwaddress ether 00:30:48:f7:1e:99
        address  172.12.0.30
        netmask  255.255.255.0
        slaves eth2 eth3
        bond_miimon 100
        bond_mode 802.3ad

That works for this bond.

But the other bond, "bond1" is part of vmbr0

Code: 
auto vmbr0
iface vmbr0 inet static
        #hwaddress ether 00:30:48:f7:1e:9b
        address  192.168.0.101
        netmask  255.255.255.0
        gateway  192.168.0.20
        bridge_ports bond1
        bridge_stp off
        bridge_fd 0

if i comment out the hwaddress line, the server is not reachable, because the base NICS have still the original MAC 00:30:48:f7:1e:9a

If i put the line hwaddress ether in the "bond1" part like this:

Code: 
auto bond1
iface bond1 inet manual
        hwaddress ether 00:30:48:f7:1e:9b
        slaves eth0 eth1
        bond_miimon 100
        bond_mode 802.3ad

It is not working either. What can i do to change the mac to a odd address?
 
copymaster said:
hi.
i am using 802.3ad in my network, which seems to work if:

i manually change the mac of one servers vmbr0.

802.3ad depends on the mac address of the interface. unfortunately, my servers all have EVEN mac addresses, which leads to bad performance.

my server has 4 NICS in two bonds

one bond is directly used for iscsi network, changing of mac is easy. I just added a line in /etc/network/interfaces hwaddress ether ....

Code: 
auto bond0
iface bond0 inet static
        hwaddress ether 00:30:48:f7:1e:99
        address  172.12.0.30
        netmask  255.255.255.0
        slaves eth2 eth3
        bond_miimon 100
        bond_mode 802.3ad

That works for this bond.

But the other bond, "bond1" is part of vmbr0

Code: 
auto vmbr0
iface vmbr0 inet static
        #hwaddress ether 00:30:48:f7:1e:9b
        address  192.168.0.101
        netmask  255.255.255.0
        gateway  192.168.0.20
        bridge_ports bond1
        bridge_stp off
        bridge_fd 0

if i comment out the hwaddress line, the server is not reachable, because the base NICS have still the original MAC 00:30:48:f7:1e:9a

If i put the line hwaddress ether in the "bond1" part like this:

Code: 
auto bond1
iface bond1 inet manual
        hwaddress ether 00:30:48:f7:1e:9b
        slaves eth0 eth1
        bond_miimon 100
        bond_mode 802.3ad

It is not working either. What can i do to change the mac to a odd address?
Click to expand...
Hi,
and what happens, if you change the mac-address at eth0? Like
Code: 
auto eth0
iface eth0 inet [FONT=monospace]static
[/FONT]       hwaddress ether 00:30:48:f7:1e:9b
       address 0.0.0.0
       netmask 0.0.0.0

Udo
 
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