T-Series Traffic Director Installation, Configuration and Administration Guide 3-3
Managing Configurations
CSM blades do not process subscriber data traffic. A set of integrated 1/10Gb switch
modules integrated into the BladeCenter shelf direct (but do not load balance) traffic across
the OSN blades.
The OSN blades of the Unison cluster sit directly in the data path of the network, between
the wireless-side router (such as a GGSN) and an Internet-side gateway. Each OSN has two
interfaces on the data plane for redundancy. VLANs separate the subscriber-side and
Internet-side traffic.
In a typical Unison deployment, the OSNs will be configured for zone-based operation.
With zones, each application blade runs two instances of the OSN software in virtualized
Solaris containers (Zone 0 and Zone 1, as shown). Therefore, each application blade will
have four interfaces (two OSNs and two interfaces per OSN).
As shown in Figure 3-1, a redundant pair of T1000s connect to the wireless-side router,
Internet-side router, and to the Unison cluster via a Layer 2 switch (or a pair of switches for
redundancy). Both 1Gb and 10Gb connections are supported, using fiber optic cable and an
appropriate SFP+ transceiver.
The T1000 supports two-port link-aggregation control protocol (LACP) on 10Gb trunk
connections. More ports can be added per trunk to support extra throughput (up to 50 Gb)
and redundancy requirements.
The T1000 performs firewall load balancing (FWLB), to transparently load balance data
plane traffic across OSNs in the direction of the Internet. Traffic passes through the OSNs
and transparently maintains its Layer 3 information. The T1000 exposes a single IP address
(or multiple, as necessary) as the destination for this traffic. The T1000 uses session
persistency to ensure that traffic returning from the Internet is routed back to the same OSN
from which it originated.
The T1000 also supports optional server load balancing (SLB) in deployments where the
Unison cluster does not function in a transparent, inline mode, but instead has a specific
routable IP address. For example, if Unison WAP Gateway functions are deployed, or
NonInline mode is used with optimization clients, the Unison cluster will have a specific IP
address requiring server load balancing.
Connecting Network Cables to T1000
The T1000 has a set of of SFP and/or SFP+ ports that are used to connect the T1000 data
plane to intermediate switches. For more information, refer to Chapter 2, “Installing the
T1000”.
Managing Configurations
The T1000 offers a range of commands that allow you to set, save, view, cancel, and
compare configurations. You should become familiar with these commands before
continuing with the configuration process.
Important: You must use the save ns config command to apply pending configurations to
the current T1000 configuration.
• All configurations should be performed from the active T1000 in a high-availability
group. You will be informed of the T1000 status when you log on to the CLI.
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