EX8200-48TL Line Card

The line cards in EX8200 switches combine a Packet Forwarding Engine and Ethernet interfaces on a single assembly. They are field-replaceable units (FRUs) that can be installed in the line card slots on the front of the switch chassis. The line cards are hot-insertable and hot-removable: You can remove and replace them without powering off the switch or disrupting switch functions.

The EX8200-48TL (48-port RJ-45 20 Gbps) line card offers maximum port density for the access layer (see Figure 1).

Figure 1: EX8200-48TL Line Card

This topic describes:

Line Card Models

Table 1 shows the model number, description of the line card model, the Junos OS release in which the model was released, the release in which support on EX8200 Virtual Chassis was introduced, and the release in which Virtual Chassis Port (VCP) support was introduced for ports on the line card.

Line Card Components

• 40 oversubscribed RJ-45 ports
• Line card status LEDs—Two status LEDs labeled ON and ST that indicate the online and status information for the line card. See Line Card LEDs in an EX8200 Switch.
• Network port LEDs—Two LEDs per network port that indicate the link/activity and status of each port. See Network Port LEDs in an EX8200 Switch.

Line Card Ports

Table 2 shows the port number, port type, and port throughput on an EX8200-48TL line card.

• The ports 0 through 23 form one port group.
• The ports 24 through 47 form another port group.

The ports in each group share 10 gigabits of bandwidth. You can transmit up to 10 gigabits of traffic through a port group without packet drop. The oversubscription ratios of different port groups can differ from one another; the ratios depend on the amount of traffic being transmitted through a port group.

• To understand how traffic is handled by oversubscribed ports, see Understanding CoS Queues on EX8200 Line Cards That Include Oversubscribed Ports.