9.6 Switching properties
The switching characteristics listed below apply to the devices named in the scope of validity.
Switching properties
Aging time Can be congured (default value: 300 seconds)
Maximum frame size 2048
Max. number of learnable address‐
es
16382
Response to LLDP frames Blocking
Response to spanning tree BPDU
frames
Forwarding
CoS acc. to IEEE 802.1Q Yes
QoS priority queues 8
Switching technique Store and forward
Latency 10 microseconds
Full wire speed switching Frame length (bytes) Number of frames per second
At 100 Mbps At 1000 Mbps With 10 Gbps
64 148810 1488095 14880952
128 84459 844595 8445946
256 45290 452899 4528986
512 23496 234962 2349664
1024 11973 119732 1197318
1280 9615 96154 961538
1518 8127 81274 812744
Note
The number of devices connected in a line, which are named in the scope of validity, inuences
the frame delay. When a frame passes through an IE switch, it is delayed by the store-and-
forward function of the device:
• With a 64-byte frame length by about 10 microseconds (at 100 Mbps)
• With a 1500-byte frame length by about 130 microseconds (at 100 Mbps)
This means that the more devices the frame passes through, the higher the frame run time.
Technical specications
9.6Switching properties
SCALANCE XR-500
116 Operating Instructions, 07/2023, C79000-G8976-C692-01
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