Exalogic 2.0.1 Tea Break Snippets - Creating Networks
By The Old Toxophilist on Jul 26, 2012
In the majority or Real World scenarios we will need to access
the Virtual Servers running within the Exalogic from an external
client network. To facilitate this we will want to leverage the
10Gb Ethernet connection and hence we will need to create 1 or
more EoIB networks that can be accessed by the Virtual Servers.
During the installation of the Exalogic 2.0.1 Virtual environment
we create a single "EoIB-external-mgmt" network that we could, in
theory, use to access the Virtual Servers we create. Although this
is possible, assuming it has enough IP Address, this would be bad
practice because this network is intended solely for management
functionality and access to the Control VMs. Therefore to provide
the Virtual Servers with external Ethernet access we will need to
create additional EoIB interfaces. Each of these will need to be
VLAN tagged to provide network isolation and partitioning.
Having created our Enterprise Manager Ops Centre
(EMOC) users we will now have a Network Administrator account that
we will use for the next process. We will need to select the
Network Accordion and then either Right-Click on the default
network and Select "Manage Network" or select the default network
and choose the "Manage Network" Action.
Once we have initiated the Manage Networks (this will create a
new managed network) wizard it will allow us to specify all the
external network information. It should be noted that all the
networks that will be need should be created prior to the creation
of the Virtual Server. This is because in the first release we are
not able to add networks, easily, through EMOC once the Virtual
Server has been created.
In this Wizard Panel we will need to define the network
information and IP range available for configuration later in the
wizard. You will see that we specify the initial IP address in a
CIDR format, I do not intend to explain CIDR, then the gateway and
MTU to be used for this network.
You will notice that as well as the name and description you are
able to defined a number of Tags, name/value pairs, that can be
used for searching within EMOC.
Specify Managed Ip Address Range
Here we define the IP addresses that are actually available
within this network. You will notice that we can specify a number
of ranges and hence you do not need to have large contiguous
ranges. The only requirement is that they are permissible within
the network range define in the first wizard panel.
Once the IP addresses have been defined we will need to assign
them to an existing Fabric and because we want to define EoIB we
will use the existing EoIB fabric to allow us access to the
external 10Gb network. As mentioned previously each of these
networks must be VLAN tagged to allow the correct partitioning and
routing across the fabric. So having selected the appropriate
fabric we will need to enter the VLAN Id. We do not need to enter
a Partition Key because EMOC will generate us a unique P-Key as
part of the network creation process.
If you need to define any static routing information for this
network range we can do this in the next wizard panel and this
will be automatically added to the appropriate tables. Within my
example this is not the case.
We no specify additional information, such as the NTP server and
Domain name. These are all optional fields and, as such, can be
At this point we can assign the new network to a specific server
pool(s) within the rack or if we do not select a pool the
whole rack. Thus we can restricted the network access to specific
parts of the rack.
If we specify a Server Pool we will be taken to Step 7 and allowed to configure the interfaces.
At this point we can also specify if the network is to be manage
/ associated with one of the Proxy Controllers. This is not a
requirement and in general we can leave this network free from
association with any of the controllers.
The Summary panel displays all information entered, for review,
and once Finish is selected a Job will be created to create
the network which will then appear in the list of available
This entry was originally posted on the The Old Toxophilist Site.