Installation guide

3 – Planning
Port Licensing
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D
3.3.3
Latency
Latency is a measure of how fast a frame travels from one port to another. The
factors that affect latency include transmission rate and the source/destination
port relationship as shown in Table 3-3.
3.4
Port Licensing
The SANbox 5200 product can come from the factory as an 8-, 12-, 16-, or 20-port
switch, enabling ports 0–7, 0–11, 0–15, or 0–19 respectively. You can upgrade the
SANbox 5200 switch to enable additional ports up to the 20-port maximum
through the purchase of a license key.
Consider the number of ports that you require and the need for 10 Gbps ports.
Make arrangements to purchase the necessary license key from your switch
distributor or authorized reseller. Refer to ”Upgrading the SANbox 5200 Switch”
on page 4-22 for information about using the license key to upgrade your switch.
Table 3-3. Port-to-Port Latency
Source/Destination Rates Same Switch I
1 Gbps - 1 Gbps < 0.6 µsec
1 Gbps - 10 Gbps < 18 µsec
2 Gbps - 2 Gbps < 0.4 µsec
2 Gbps - 10 Gbps < 8 µsec
10 Gbps - 1 Gbps < 0.6 µsec
10 Gbps - 2 Gbps < 0.4 µsec
10 Gbps - 10 Gbps < 0.2 µsec