Module Redundancy And Gres; Targeted Traffic Distribution On Aggregated Ethernet Interfaces In A Virtual; Chassis; Targeted Distribution In A Virtual Chassis - Juniper EX9200 Features Manual

CHAPTER 6

Module Redundancy and GRES

Targeted Traffic Distribution on Aggregated Ethernet Interfaces in a Virtual Chassis

Targeted Distribution in a Virtual Chassis

Copyright © 2017, Juniper Networks, Inc.

Targeted Traffic Distribution on Aggregated Ethernet Interfaces in a Virtual

Chassis on page 51
Configuring Module Redundancy for a Virtual Chassis on page 52
Determining GRES Readiness in a Virtual Chassis Configuration on page 54
By default, member routers or switches in an EX9200 or MX Series Virtual Chassis use
hash-based traffic distribution for subscriber interfaces in aggregated Ethernet bundles
configured without link protection. The hash-based model distributes subscriber interface
traffic over multiple links in the bundle, enabling you to load balance multiple traffic
flows through the logical subscriber interface.
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.
Targeted Distribution in a Virtual Chassis on page 51
Benefits of Targeted Distribution on page 52
Targeted distribution enables you to configure the Virtual Chassis to send (target) all
egress data traffic for a logical subscriber interface across a single member link in an
aggregated Ethernet bundle, also referred to as an IEEE 802.3ad link aggregation group
(LAG) bundle. You configure targeted distribution for a demux subscriber interface on
the Virtual Chassis master router or switch.
With targeted distribution, the router or switch in a Virtual Chassis assigns the primary
member link and backup member link for the aggregated Ethernet bundle across all
Virtual Chassis port links that belong to the aggregated Ethernet bundle. To accomplish
load balancing, the router or switch evenly distributes the demux subscriber interfaces
over these member links.
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