Siemens SCALANCE X-300 Series Operating Instructions Manual page 218

Technical specifications
8.10 SFP technical specifications
Note
The IE Switches X-300 support full wire speed switching complying with IEEE 802.3 on all ports.
The number of packets depends on the packet length according to the IEEE802.3 standard:
Table 8-119 Full wire speed switching
at 100 Mbps
148810
84459
45290
23496
11973
9615
8127
Note
The following applies to IE Switches X-300:
The number of IE Switches X-300 connected in a line influences the frame propagation time.
When a frame passes through an IE Switch X-300, it is delayed by the Store&Forward function
of the IE Switch X-300
● with a 64 byte frame length by approx. 10 microseconds (at 100 Mbps)
● with a 1500 byte frame length by approx. 130 microseconds (at 100 Mbps)
This means that the more IE Switch X-300 devices the frame passes through, the longer the
frame delay.
218
Number of frames
at 1000 Mbps
1488095
844595
452899
234962
119732
96154
81274
At a frame length of (in bytes):
64
128
256
512
1024
1280
1518
Operating Instructions, 11/2019, A5E01113043-24
SCALANCE X-300