slot. In other configurations, even higher port density can be achieved. This is beneficial because the Cisco
ASR 9000 Series Router has a per-slot non blocking capacity of up to 400 Gbps (with appropriate RSPs)
and there is no other way of physically fitting hundreds of gigabit ethernet ports/ SFPs on the face plate
of a single Cisco ASR 9000 Series line card. As a result, in order to utilize the full capacity of an Cisco
ASR 9000 Series line card, it is necessary to physically separate out the ethernet ports, while maintaining
logical management control. This would appear as if all ports were physically on a single large line card
of the Cisco ASR 9000 Series Router.
2
Reduced cost - All the edge-routing capabilities and application features of the Cisco IOS XR software
are available on low cost access switches.
3
Reduced operating expense - You can seamlessly upgrade software images, and also manage the chassis
and services from a common point. This includes a single logical router view, single point of applying
CLI or XML interface for the entire system of switches, a single point of monitoring the entire system of
switches and a single point of image management and software upgrades for the entire system.
4
Enhanced feature consistency - All the features on the regular GigE ports of Cisco ASR 9000 Series
Router are also available on the access ports of a satellite access switch in a functionally identical and
consistent manner. The typical application of a satellite system would be in the access and aggregation
layers of a network. By integrating the access switches along with the aggregation or core switch, you can
ensure that there are no feature gaps between the access switch and the aggregation or core switch. All
features, such as carrier ethernet features, QoS and OAM, function consistently, from access to core,
because of this integrated approach.
5
Improved feature velocity - With the satellite solution, every feature that is implemented on the
Cisco ASR 9000 Series Router becomes instantly available at the same time in the access switch, resulting
in an ideal feature velocity for the edge switch.
6
Better resiliency - The nV satellite solution enables better multi-chassis resiliency, as well as better
end-to-end QoS. For more information on QoS capabilities, see Cisco ASR 9000 Series Aggregation
Services Router QoS Configuration Guide .
Overview of Port Extender Model
In the Port Extender Satellite switching system also called as Hub and Spoke model, a satellite switch is
attached to its host through physical ethernet ports.
In releases later than Cisco IOS XR Software Release 4.2.1, attachment models beyond the port extender
model are also supported.
Note
The parent Cisco ASR 9000 Series Router is referred as the host in this model. From a management or a
provisioning point of view, the physical access ports of the satellite switch are equivalent to the physical
ethernet ports on the Cisco ASR 9000 Series Router. You do not need a specific console connection for
managing the Satellite Switching System, except for debugging purposes. The interface and chassis level
Cisco ASR 9000 Series Aggregation Services Router nV System Configuration Guide, Release 5.3.x
9
Configuring the Satellite Network Virtualization (nV) System
Overview of Port Extender Model
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