Cisco ASR 9000 Series Configurazione delle impostazioni di rete - Pagina 5

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Configuring the Satellite Network Virtualization (nV) System on the Cisco ASR 9000 Series Router

SAT1, SAT2, and the host Cisco ASR 9000 Series Router need not be located in the same geographic

Note

location. This means that the ICLs need not be of nominal length for only intra-location or intra-building

use. The ICLs may be tens, hundreds, or even thousands of miles in length, thereby creating a logical

satellite switch spanning a large geography.

In a Cisco ASR 9000 Series Router multi-chassis cluster system, there are multiple Cisco ASR 9000

Note

Series Router systems within a single virtual switch system. Logically however, it is still considered a

single host system.

Features Supported in the Satellite nV System

This section provides details of the features of a satellite system.

Satellite System Physical Topology

The satellite system supports the point-to-point hub and spoke physical topology for the ICLs between

satellite switches and the host Cisco ASR 9000 Series Router. This topology allows a physical Ethernet

MAC layer connection from the satellite to the Cisco ASR 9000 Series Router. This can be realized

using a direct Ethernet over Fiber or Ethernet over Optical transport (such as Ethernet over a SONET/

SDH/ CWDM/ DWDM network).

This topology also allows a satellite switch to be geographically at a separate location, other than that

of the host Cisco ASR 9000 Series Router. There is no limit set for the distance, and the solution works

even when the satellite is placed at a distance of tens, hundreds, or even thousands of miles from the host.

Inter-Chassis Link Redundancy Modes and Load Balancing

The Cisco ASR 9000 Series Satellite system supports these redundancy modes:

•

In the redundant ICL mode, the load balancing of traffic between members of the IC bundle is done using

a simple hashing function based on the satellite access port ID, and not based on the flow based hash

using L2 or L3 header contents from the packets. This ensures that a single ICL is used by all packets

for a given satellite access port. As a result, the actions applied for QoS and other features consider all

the packets belonging to a single satellite access port.

For more details on QoS application and configuration on ICLs, see Cisco ASR 9000 Series Aggregation

Services Router Modular Quality of Service Configuration Guide.

Cisco ASR 9000 Series Aggregation Services Router Interface and Hardware Component Configuration Guide

OL-26061-03

Non-redundant inter-chassis links mode - In this mode, there is no link level redundancy between

inter-chassis links of a satellite.

Redundant inter-chassis links mode - In this mode, the link level redundancy between

inter-chassis links are provided using a single link aggregation (LAG) bundle.

Overview of Port Extender Model

HC-711