Change IP addresses on adapter used for iSCSI traffic

[stephan.schulze]

Hello,

We're running a four node Proxmox cluster with currently one PetaSAN storage cluster presenting its LUNs via iSCSI in two subnets (192.168.160.0/24 and 192.168.161/24). In the very near future there will be another PetaSAN storage cluster operating in two new subnets (192.168.162.0/24 and 192.168.163.0/24).

Network configuration looks like this:
- bond0 on if0 and if1
- vmbr1 on bond0
- vmbr1:0 with IP address of one storage subnet (192.168.160.100/24)
- vmbr1:1 with IP address of second storage subnet (192.168.161.100/24)

Idea is to add vmbr1:2 and vmbr1:3 in order to add the both other subnets. So far, so good.

My question is: How to get those two additional IP addresses up without bringing vmbr1:0 and vmbr1:1 down - causing the VMs using the existing iSCSI LUNs on existing PetaSAN storage cluster to fail/stale/...?

Thanks for any help / ideas / suggestions

 

[bbgeek17]

You should use non-legacy method described here:
https://wiki.debian.org/NetworkConfiguration#Multiple_IP_addresses_on_one_Interface

Once you edit the configuration, just "ifup vmbr0" and you will get second IP.

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