Cisco ASR 9000 Series System Configuration Guide

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.
Cisco IOS XR Software supports the co-existence of redundant and non-redundant ICL modes on the
same nV satellite shelf (only for 9000v) from Cisco IOS XR Software Release 4.3.x onwards. If a satellite
system is operating in redundant ICL mode, then you cannot configure link bundles of any form (with or
without LACP) on the access ports of that same satellite switch.
Note
If a satellite system is operating in redundant ICL mode, then Ethernet OAM features are not supported
on the access ports of that satellite. Additionally, redundant ICL mode is not supported for Layer 2 fabric
and simple ring network topologies.
Note
For more details on QoS application and configuration on ICLs, see Cisco ASR 9000 Series Aggregation
Services Router Modular Quality of Service Configuration Guide .
Satellite Discovery and Control Protocols
A Cisco proprietary discovery and control protocol is used between the satellite switches and the host Cisco
ASR 9000 Series Router devices, to handle discovery, provisioning, and monitoring of the satellite devices
from the host Cisco ASR 9000 Series Satellite System in-band over the ICLs. The Satellite Discovery And
Control (SDAC) Protocol provides the behavioural, semantic, and syntactic definition of the relationship
between a satellite device and its host.
Satellite Discovery and Control Protocol IP Connectivity
The connectivity for the SDAC protocol is provided through a normal in-band IP routed path over the ICLs
using private and public IP addresses appropriate for the carrier's network.
You can configure a management IP address on the host CLI for each satellite switch and corresponding IP
addresses on the ICLs. You can select addresses from the private IPv4 address space (for example, 10.0.0.0/8
or 192.1.168.0/24) in order to prevent any conflict with normal service level IPv4 addresses being used in the
IPv4 FIB. You can also configure a private VRF that is used for only satellite management traffic, so that the
IP addresses assigned to the satellites can be within this private VRF. This reduces the risk of address conflict
or IP address management complexity compared to other IP addresses and VRFs that are used on the router.
ICL Fabric Port Monitoring
This feature enables the host to create virtual fabric port interfaces locally to represent each of the fabric facing
interfaces on the satellite. Interfaces are created when the satellite informs the host that the port exists and is
in Active state on the topology channel. This allows you to monitor the information related to the links within
fabric ports and get their Layer 1 and Layer 2 parameters from the host. The satellite sends the ICL interface
details to the host through the topology channel messages. You can run SNMP queries on these interfaces.
Cisco ASR 9000 Series Aggregation Services Router nV System Configuration Guide, Release 5.3.x
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Configuring the Satellite Network Virtualization (nV) System
Satellite Discovery and Control Protocols

Cisco ASR 9000 Series Specifications

General

Brand	Cisco
Model	ASR 9000 Series
Category	Network Router
Language	English