Alcatel-Lucent 7750 SR-a8 - 4-Port 10 Gige SFP+ MDA-A Overview; Port Line Rate; Table 68 4-Port 10 Gige SFP+ MDA-A Features; Figure 51 4-Port 10 Gige SFP+ MDA-A Features

4-port 10GigE SFP+ MDA-a Overview
154 7750 SR-a4 and SR-a8 Installation Guide
4-port 10GigE SFP+ MDA-a Overview
Figure 51 shows the 4-port 10GigE SFP+ MDA-a. Table 68 describes the features.
Figure 51: 4-port 10GigE SFP+ MDA-a Features
Port Line Rate
The 4-port 10GigE SFP+ MDA-a card is an oversubscribed 25 Gb/s MDA-a. The card’s
connection to the IOM is only 25 Gb/s. The card supports 10 Gb/s line rate out of each port
only if 2 or fewer ports are in use.
If more than 2 ports are in use, the per-port maximum simultaneous line rate diminishes as a
ratio of 25 Gb/s divided by the number of ports in use. For example, if all 4 ports are installed
and are run at full speed, the line rate is approximately 25 Gb/s divided by 4 ports, which is
6.25 Gb/s per port.
Pwr
7750 MDA-a
4-10GB-SFP+
Stat
3
Lnk Act
4
Lnk Act
1
Lnk Act
2
Lnk Act
24573
1 1
32 5
4
Table 68: 4-port 10GigE SFP+ MDA-a Features
Key Label/Part Description
1 Captive screws Secures the MDA-a in place.
2 7750 MDA-a type -a suffix: The card can operate in any MDA-a slot at or near the line rate. See
Port Line Rate on page 154 for more information.
3 Pwr / Stat Power and Status LED. See 4-port 10GigE SFP+ MDA-a LEDs.
4 Ports Four 10 Gigabit Ethernet SFP+ ports, numbered 1 to 4.
5 MDA-a model 4-10GB-SFP+