Cisco Ex SERIES Bedienungsanleitung PDF herunterladen (Seite 50)

Juniper Networks/Cisco Systems Switch Interoperability Cookbook

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Validation!

The command show services rpm history-results will display up to 50

results of RPM probes and tests:

admin@ex9208# run show services rpm history-results

Owner, Test Probe received Round trip time

myprobe, t1 Fri Apr 18 00:31:20 2014 2802

usec

myprobe, t1 Fri Apr 18 00:31:21 2014 5441

usec

myprobe, t1 Fri Apr 18 00:31:22 2014 9909

usec

myprobe, t1 Fri Apr 18 00:31:23 2014 2754

usec

myprobe, t1 Fri Apr 18 00:31:24 2014 3334

usec

Redundant&Trunk&Group&(RTG)&

Objective!

To validate failover functionality of Juniper’s Redundant Trunk Group (RTG) feature

between Juniper and Cisco switches.

Background!

Juniper’s Redundant Trunk Group (RTG) feature allows definition of primary and

secondary paths between switches and redirects traffic across the secondary trunk if the

primary link fails. RTG provides an alternative to spanning tree bridging for

redundancy. RTG works in mixed Juniper-Cisco environments with no additional

configuration needed on Cisco switch ports. Up to 16 redundant trunk groups can be

defined on a standalone switch or Juniper Virtual Chassis Fabric.

Topology!

In this example, three devices – one from Juniper and two Cisco – form a ring topology.

The devices are the Juniper Virtual Chassis Fabric (in turn comprised of two Juniper

QFX5100 and one Juniper EX4300 switches); a Cisco Nexus 7010; and a Cisco Catalyst

3850. At test time, RTG was not supported in the Juniper EX9200, so it was not included

in this test.

In this example, the inter-switch ports are VLAN trunk ports allowing traffic from VLAN

IDs 2001-2003. However, RTG works equally well with or without VLAN trunking.

Spirent TestCenter traffic generator/analyzers offer frames to access ports on each switch.

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Cisco Ex SERIES Bedienungsanleitung Seite 50