Multiple IP address on ProxMox host

[rholder]

G'day.

I have searched for an answer, and not found it, so please excuse me if I am asking something that has been answered.

Set-up:

There are two physical NICs in the server. I have the following:
192.168.1.238 on vmbr1 which goes via eth1
192.168.2.238 on vmbr0 which goes via eth0
192.168.3.238 on vmbr2 which goes via eth0
eth0 is plugged into a switch with the other servers in the 192.168.2.0 and 192.168.3.0 servers.
eth1 is plugged into a switch with the 192.168.1.0 network machines.
192.168.1.0 ==> LAN
192.168.2.0 ==> DMZ
192.168.3.0 ==> DMZ

Problem:
I cannot ping the 192.168.3.238 from any network.
I cannot ping any 192.168.3.x address from the ProxMox host.

Additional info:
I can ping 192.168.1.x and 192.168.2.x from the ProxMox host.
I can ping 192.168.1.238 and 192.168.2.238 from the respective networks.
I can ping all the ProxMox host IP addresses from within the host itself, so I know they are configured and answering.

I have rebooted, a couple times, for various reasons.

I appreciate any suggestions.

Cheers.
Bobby

 

[hec]

You should use vlans that your setup is working as expected.
We are talking about /24 networks right?

The best is to do a 802.3ad on eth0 and eth1. Then 3 vlans on the etherchannel and your setup should work fine.
Here is an example for such a setup:

pmx-00:~# cat /etc/network/interfaces 
# Physical interfaces
auto lo
iface lo inet loopback
iface eth0 inet manual
iface eth1 inet manual


# 802.3ad
auto bond0
iface bond0 inet manual
    slaves eth0 eth1
    bond_miimon 100
    bond_mode 4


# VLANS
auto bond0.101
iface bond0.101 inet manual
    vlan-raw-device bond0


auto bond0.102
iface bond0.102 inet manual
    vlan-raw-device bond0


auto bond0.110
iface bond0.110 inet manual
    vlan-raw-device bond0


auto bond0.111
iface bond0.111 inet manual
    vlan-raw-device bond0


auto bond0.120
iface bond0.120 inet manual
    vlan-raw-device bond0


# Bridges
auto vmbr0
iface vmbr0 inet static
    address 10.0.8.101
        netmask 255.255.255.0
        gateway 10.0.8.1
    bridge_ports bond0.102
    bridge_stp off
    bridge_fd 0


auto vmbr1
iface vmbr1 inet manual
    bridge_ports bond0.101
    bridge_stp off
    bridge_fd 0


auto vmbr2
iface vmbr2 inet manual
        bridge_ports bond0.110
        bridge_stp off
        bridge_fd 0


auto vmbr3
iface vmbr3 inet manual
        bridge_ports bond0.111
        bridge_stp off
        bridge_fd 0


auto vmbr4
iface vmbr4 inet manual
        bridge_ports bond0.120
        bridge_stp off
        bridge_fd 0

As you see i only have one ip address for the proxmox server.

Why are need 3 ips on the proxmox hos? Your firewall/router should route the traffic to the right ip address.

 

[udo]

...
192.168.1.238 on vmbr1 which goes via eth1
192.168.2.238 on vmbr0 which goes via eth0
192.168.3.238 on vmbr2 which goes via eth0
eth0 is plugged into a switch with the other servers in the 192.168.2.0 and 192.168.3.0 servers.
...

Hi Bobby,
you can't connect one nic to two different bridges.

In you case you can use vlan-tagging like hec allready wrote (but your switch must support this).

Then you can use something like
vmbr0 -> eth0.2 (subnet 192.168.2/24)
vmbr2 -> eth0.3 (subnet 192.168.3/24)
if you define vlan2+3 on the switch.

Udo

 

[rholder]

Thank you to both of you for your assistance.

Cheers.
Bobby

 

[kotakomputer]

Since this is only a LAN then simple change subnet to 255.255.248.0.