Product overview
The Cisco® 25GBASE SFP28 (Small Form-Factor Pluggable) portfolio offers customers a wide variety of high-density and low-power 25 Gigabit Ethernet connectivity options for data center and high-performance computing networks applications. The 25G Modules are based on SFP28 form factor.
Cisco SFP-25G copper cables
Cisco SFP28 to SFP28 copper direct-attach 25GBASE-CR1 cables are suitable for very short links and offer a highly cost-effective way to establish a 25-Gigabit link between SFP28 ports of Cisco switches within racks and across adjacent racks. Cisco offers passive copper cables in lengths of x= 1, 1.5, 2, 2.5, 3, 4 and 5 meters.
1m, 1.5m, and 2m cables do not require FEC on the host ports; 2.5m and 3m cables require BASE-R FEC (also know as FC-FEC) on the host ports; 4m and 5m cables require RS-FEC on the host ports.
Cisco SFP-25G active optical cables
Cisco SFP28 to SFP28 Active Optical Cables are direct-attach fiber assemblies with SFP connectors. They are suitable for very short distances and offer a cost-effective way to connect within racks and across adjacent racks. Cisco offers Active Optical Cables in lengths of 1, 2, 3, 4, 5, 7, and 1 meters.
AOC cable require BASE-R FEC on the host ports.
Cisco SFP-25G-SR-S
The Cisco 25GBASE-SR Module supports a link length of 7/1m on OM3/4 MMF.
This module requires RS-FEC on the host ports.
Cisco SFP-1/25G-CSR-S
The Cisco 1/25GBASE-CSR Module supports a link length of up to 3/4m over OM3/4 at 1G, and up to 3/4m over OM3/4 at 25G*.
This module requires RS-FEC on the host port for full reach operation at 25G. Using BASE-R FEC the module can support 7/1m over OM3/4 and with-out FEC it can support 3/5m over OM3/4 at 25G*. For 1G operation FEC is not required.
Cisco SFP-1/25G-LR-S
The Cisco 1/25GBASE-LR Module supports a link length of 1 kilometers on standard Single-Mode Fiber (SMF) G.652 at both 1G and 25G.
This module requires RS-FEC on the host ports for operation at 25G.
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