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Juniper Networks/Cisco Systems Switch Interoperability Cookbook

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combined into a Virtual Chassis Fabric; these all use the same link aggregation

commands given here. Note that LAG member interfaces can reside on different physical

switches in a Virtual Chassis or Virtual Chassis Fabric configuration; see the Junos

Software Configuration Guide for more details.

Interfaces xe-5/3/1 and xe-12/3/0 on the Juniper switch make up the members of the

LAG. On the Cisco switch, the LAG members are interfaces TenGigabitEthernet1/1/3

and TenGigabitEthernet1/1/4. LACP is enabled on all LAG members.

Figure 6 shows the topology used to validate link aggregation and LACP functionality.

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Juniper!commands!

Juniper Junos uses the ae interface notation to define each “aggregated Ethernet”

instance. The procedure is as follows:

1. Configure the desired number of link aggregation instances (just one, in this example):

admin@EX9208> configure

admin@EX9208# set chassis aggregated-devices ethernet device-count 1

2. Specify the members to be included within the aggregated Ethernet bundle:

admin@EX9208# set interfaces xe-5/3/1 ether-options 802.3ad ae1

admin@EX9208# set interfaces xe-12/3/0 ether-options 802.3ad ae1

3. Enable LACP on the aggregated Ethernet instance:

admin@EX9208# set interfaces ae1 aggregated-ether-options lacp active

admin@EX9208# set interfaces ae1 description "linkagg to 3850"

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Cisco Ex SERIES Manual de usuario Pagina 28