what is device's switch capacity and system switching capacity?

ernesto_cupet6 · Created Mar 10, 2020 15:24:52

Hello friend

Note that the value before the slash (/) refers to the device's switching capability, while the value after the slash (/) means the chip's switching capability.

Note that switching capacity depend on number of ports so two switch of the same family can have probably the same chip installed (same chip's switching capability) but different number of ports so differents switching capability. The chip's switching capability can give you the idea of how powerful is the chip installed.

DDSN · Created Mar 15, 2022 03:19:14

The switching capacity (backplane bandwidth) of a switch refers to the maximum amount of data that can be transmitted between a switch interface processor or interface card and a data bus. The switching capacity indicates the total data exchange capability of the switch, in bps.

The switching capacity of the switch = Number of ports * Rate of the port *2 (full-duplex).

For example, the switching capacity of a 24-port 100M switch is =24*100*2=4.8Gbps.

Switch capacity =Forwarding performance *8* (64+8+12)*2 =Forwarding performance*1344 .

Therefore, you need to evaluate the performance of a switch based on the forwarding performance and switching capacity, but not only the interface rate and the number of interfaces.

A 24-port 100 Mbit/s switch must have a forwarding performance of 3.5712Mpps and a switching capacity of 4.8 Gbps. If the two parameters cannot reach this value, the performance of the switch does not meet the requirement.

ernesto_cupet6 · Created Mar 10, 2020 15:24:52

Hello friend

Note that the value before the slash (/) refers to the device's switching capability, while the value after the slash (/) means the chip's switching capability.

Note that switching capacity depend on number of ports so two switch of the same family can have probably the same chip installed (same chip's switching capability) but different number of ports so differents switching capability. The chip's switching capability can give you the idea of how powerful is the chip installed.

LAMINOV · Created Jan 6, 2021 15:58:01

Hi,

Many thanks

DDSN · Created Mar 15, 2022 03:19:14

The switching capacity (backplane bandwidth) of a switch refers to the maximum amount of data that can be transmitted between a switch interface processor or interface card and a data bus. The switching capacity indicates the total data exchange capability of the switch, in bps.

The switching capacity of the switch = Number of ports * Rate of the port *2 (full-duplex).

For example, the switching capacity of a 24-port 100M switch is =24*100*2=4.8Gbps.

Switch capacity =Forwarding performance *8* (64+8+12)*2 =Forwarding performance*1344 .

Therefore, you need to evaluate the performance of a switch based on the forwarding performance and switching capacity, but not only the interface rate and the number of interfaces.

A 24-port 100 Mbit/s switch must have a forwarding performance of 3.5712Mpps and a switching capacity of 4.8 Gbps. If the two parameters cannot reach this value, the performance of the switch does not meet the requirement.

what is device's switch capacity and system switching capacity?

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what is device's switch capacity and system switching capacity?

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