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Juniper Networks/Cisco Systems Switch Interoperability Cookbook

! ! !

Topology!

Figure 2 shows the GRE validation test bed. This example uses a GRE tunnel between a

Juniper Virtual Chassis (here, comprising two Juniper EX9208 switches) and a Cisco

Nexus 7010 switch. The GRE tunnel endpoints are in the 192.18.44.0/24 subnet, and the

tunnel uses a 10-gigabit Ethernet link between switches.

Even though a different subnet (192.18.38.0/24) is configured on the physical interfaces

of both switches, traffic will traverse the GRE tunnel. In this example, the Juniper and

Cisco devices use OSPF to learn about network reachability.

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Juniper!commands!

1. Define IP addresses on the inter-switch link and the link to the Spirent TestCenter

traffic generator/analyzer. Note that these addresses are associated with the physical

interfaces, not the GRE tunnel:

admin@ex9208> configure

admin@ex9208# set interfaces xe-5/0/5 description "physical interface to

Nexus 7010 e3/9"

admin@ex9208# set interfaces xe-5/0/5 unit 0 family inet address

192.18.38.1/24

admin@ex9208# set interfaces ge-2/0/0 description "physical interface to

STC"

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Cisco Ex SERIES Manual de usuario Pagina 10