Benefits Of Targeted Distribution; Configuring Module Redundancy For A Virtual Chassis - Juniper EX9200 Features Manual

Virtual Chassis Feature Guide for EX9200 Switches

Benefits of Targeted Distribution

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Configuring Module Redundancy for a Virtual Chassis

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Targeted distribution is especially useful in a Virtual Chassis configuration in which
subscriber traffic enters through a Virtual Chassis port on one member router or switch
and exits through a Virtual Chassis port on a different member router or switch. By
combining Virtual Chassis ports from different member router or switches as member
links of the aggregated Ethernet bundle, targeted distribution provides increased
redundancy in the event of a chassis or link failure.
Release Description
13.2 Starting in Junos OS Release 13.2, as an alternative to using hash-based distribution
in an EX9200 or MX Series Virtual Chassis, you can configure targeted traffic
distribution for IP demultiplexing (demux) or VLAN demux subscriber interfaces
in an aggregated Ethernet bundle that is configured without link protection.
Redundancy Mechanisms on Aggregated Ethernet Interfaces in a Virtual Chassis
Configuring Module Redundancy for a Virtual Chassis on page 52
Configuring Chassis Redundancy for a Virtual Chassis
By default, a router or switch uses link redundancy for aggregated Ethernet interfaces
(bundles) configured with targeted traffic distribution. Starting in Junos OS Release 13.2,
as an alternative to using link redundancy, you can configure module redundancy, also
known as FPC redundancy, for a Virtual Chassis configured with targeted traffic distribution
for IP demux or VLAN demux subscribers on aggregated Ethernet interfaces.
In a Virtual Chassis, module redundancy assigns the primary link and backup link to
different MPC/MIC modules or line cards, regardless of the Virtual Chassis role (master
or backup) of the member device in which the module is installed. Module redundancy
provides redundancy protection if a module or a link in the Virtual Chassis fails.
Before you begin:
Configure a Virtual Chassis consisting of two MX Series routers or two EX9200 switches.
See Example: Configuring Interchassis Redundancy for MX Series 3D Universal Edge
Routers Using a Virtual Chassis
Ensure that the aggregated Ethernet bundle is configured without link protection.
See Configuring Aggregated Ethernet Link Protection
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