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From Jon Marshall <>
Subject Re: Advanced networking - physical NICs.
Date Tue, 03 Jul 2018 11:58:35 GMT

Many thanks, will give it a go.


From: Paul Angus <>
Sent: 03 July 2018 12:13
Subject: RE: Advanced networking - physical NICs.

Hi Jon,

1. Yes
2. You tell CloudStack what VLAN the public IPs are on, CloudStack will add the VLAN tags
3. CloudStack will do it automatically
4. 'something' like this:


BRIDGE= cloudbr1


DEVICE= cloudbr1

NOTE the public/guest interface (eth1 in this case) will then need to be connected to a trunk
interface on your switch which allows all of the VLANs that you need for public and private

Kind regards,

Paul Angus<>
Shapeblue - The CloudStack Company<>
ShapeBlue are the largest independent integrator of CloudStack technologies globally and are
specialists in the design and implementation of IaaS cloud infrastructures for both private
and public cloud implementations.

53 Chandos Place, Covent Garden, London  WC2N 4HSUK

-----Original Message-----
From: Jon Marshall <>
Sent: 03 July 2018 11:55
Subject: Advanced networking - physical NICs.

I come from a Cisco background so I understand vlans, tagging and how to configure switches
for trunks and I also understand how to configure tagging on CentOS.

The bit that is just not clicking with me is how to configure the NIC with CS using KVM and
advanced networking.

The management/storage NIC is easy as I just assign an IP directly the bridge configuration
file (cloudbr0) as there is no vlan tagging here.

The second NIC I want to run guest and public traffic across and I am using another bridge
- cloudbr1.

Questions -

1) Is it okay to run guest and public traffic on the same NIC ?

2) do the public IPs only live on the VR ie. do I need a cloudbr1.<vlan ID> for the
public IP range ?

3) whenever I add a new guest network once setup do I first need to setup the cloudbr1.<vlan
ID> for that guest network or does cloudstack do this automatically ?

4) Assuming it is okay to run guest and public on same NIC what would the initial configuration
of cloudbr1 look like ?

Apologies for all the questions but I am just getting completely stuck on this

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