Switches ready to support 25 and 50 Gigabit Ethernet have been a main focus in the development of next-generation Cisco Nexus®
switches. The launch of the Cisco Nexus 93180YC-EX Switch, the industry’s first 25-Gbps-capable
1-Rack-Unit (1RU) switch, underscores that focus. What makes this achievement especially significant
is the fact that the 93180YC-EX was built using the home-grown Cisco® Cloud Scale Application-Specific
Integrated Circuit (ASIC) leveraging 16-nanomet (nm) technology. Since then, Cisco has aggressively
continued to build its 25 and 50 Gigabit Ethernet switch portfolio. The new Cisco Nexus 93180YC-FX
Switch supports the full IEEE requirements for 25 Gigabit Ethernet. The advancements in 16-nm
technology have enabled Cisco to differentiate itself from its competitors. By adding flow tables,
unified ports, congestion control, and other features to its chips, Cisco can offer more to customers
at an affordable price.
At the same time, Cisco realizes that many customers have standardized their architectures on merchant silicon, including
Trident and Tomahawk chip sets from Broadcom. A subset of the Cisco Nexus Family switches, including
Cisco Nexus 3000 Series Switches, continue to support these merchant-silicon ASICs.
Note that two different 25 Gigabit Ethernet standards were developed in parallel: 25-Gbps connectivity between the server
and the ToR switch within the rack, and 25-Gbps connectivity across racks and between switches.
Cisco is leading and actively participating in efforts both to standardize 25 Gigabit Ethernet
and bring it to market. All Cisco Nexus 9200, 9300 EX, and 9500 platform switches based on Cisco
Cloud Scale technology comply with the 25 Gigabit Ethernet consortium specifications.