The Arista SFP-25G-ER is a SFP28 25GBASE-ER module from Arista Networks for 25 Gbps links. It plugs into a SFP25 / SFP28 port on an Arista switch and is used for 25G server access, leaf-spine fabrics and 10G-to-25G migrations.

Arista specifies the SFP-25G-ER for 40 km on duplex single-mode fiber. Arista notes that proper optical attenuation is required on shorter links to protect the receiver from damage.

Per Arista's published optics data sheet, the SFP-25G-ER transmits −3 to 6 dBm and receives −21 to −4 dBm.

The SFP-25G-ER uses a Duplex LC connector on single-mode (G.652), at 1310 nm. Both ends of the link must use the same optical standard.

It works in Arista switches with SFP25 / SFP28 ports that support this optic. Send us your switch model and EOS version and we will check it against Arista's Transceiver and Cable Guide before dispatch, so you only receive a module that works in your port.

SFP-25G-LR covers up to 10 km; SFP-25G-ER covers up to 40 km. ER has a much stronger transmitter, so on short links it needs an attenuator.

Yes. Next Gen Networks supplies original Arista Networks optics, not third-party lookalikes or grey-market stock. Every unit is checked before dispatch, and we share the serial numbers on request so you can verify them in EOS ('show inventory').

The Arista SFP-25G-ER price in India depends on quantity, delivery city and current stock. Next Gen Networks supplies it with a GST invoice (input tax credit ready) and pan-India dispatch from New Delhi. Send the part number, quantity and delivery city on WhatsApp +91-7827955775 or email Sales@nextgennetworks.in and we reply with a GST quote.

Arista lists maximum power of 2 W for the SFP-25G-ER. Check your switch's per-port power budget for dense deployments.