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Juniper Networks commissioned Network Test to assess interoperability, with an emphasis on data center
connectivity, between Juniper and Cisco switches. From Juniper, the devices tested included the EX9200,
QFX5100, and EX4300 switches and MX80 router; from Cisco, the devices tested were the Nexus 7010
and Catalyst 3850 switches, the Cisco 5508 Wi-Fi controller, and Cisco 3602 and 3702 Wi-Fi access
points. In every test case where Juniper and Cisco switches supported the same protocol, all switches
correctly forwarded traffic.
These results demonstrate that users don’t need to be locked into a single-vendor solution. Juniper devices
fully supported all the open networking standards described here, and interoperated with Cisco gear even
in cases where Cisco-proprietary protocols were involved.
In this evaluation, Network Test validated the interoperability of 18 protocols. The following table
summarizes results of interoperability testing.
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*! Cases noted as “not tested” refer to situations where either the Juniper or Cisco software image tested did not support a given
protocol. Details for each protocol are given later in this document. Appendix B lists software versions tested for each switch.
**!The Juniper EX4300 and Juniper QFX5100 both support all permutations of spanning tree tested. At testing time, the Juniper
EX4300 did not support spanning tree when it is part of a Virtual Chassis Fabric. Network Test evaluated spanning tree on the
Juniper EX4300 in standalone mode.
***!Tested with the Juniper EX4300; at test time, the Juniper QFX5100 did not support power over Ethernet.
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