Attributes of 400GBASE-SR8 optics offer maximum flexibility for fanout and shuffle applications. Figures 18
and 19 show point-to-point, 2x2 fiber shuffle, 4x4 fiber shuffle and 8x50 G breakout capabilities and applications.
LEFT SR8 Point-to-Point Link
SR8 SR8
SR8 SR8
SR8 SR8
RIGHT SR8 module shown in 8 x 50G breakout
mode to connect a 400G port on a TOR switch to 8 x 50G server ports
May be implemented over a few meters in AOC
October/November/December 2020 I 61
SR8 SR8
RIGHT 2 x 2 fiber shuffle allows a
32-port 400G switch to be used as 64
port 200G switch
SR8 SR8
SR8 SR8
SR8 SR8
SR8 SR8
FIGURE 18: 400GBASE-SR8 point-to-point and shuffle modes.
LEFT 4 x 4 fiber shuffle allows
a 32-port 400G switch to be used
as a 128-port 100G switch
ABOVE SR8 module shown in point-to-point link
FIGURE 19: 400GBASE-SR8 breakout.
SR8
SR
SR
SR
SR
SR
SR
SR
SR