40-port SFP+ Line Card in an EX8200 Switch

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. See Figure 1.

Figure 1: 40-port SFP+ Line Card

This topic describes:

Line Card Models

Table 1 shows the model numbers, description of the line card models, the Junos OS release in which the line card 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.

Note: We recommend that you do not install extra-scale line card models and non-extra-scale models in the same switch or Virtual Chassis. If you install extra-scale line cards in a switch or Virtual Chassis that has non-extra-scale models installed, the IPv4 and IPv6 route table sizes default to those of the non-extra-scale models and you will not get the benefit of the increased table sizes of the extra-scale models. You will experience these decreased route table sizes in a Virtual Chassis even when the non-extra-scale line cards are installed in one member switch and the extra-scale line cards are installed in another member switch.

Line Card Components

• 40 oversubscribed 10-gigabit SFP+ ports, which can house SFP+ or SFP transceivers
• 40 dust covers (shipped in an accessory bag)
• 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

The ports on the faceplate of the line card are numbered sequentially. The ports are divided into eight groups, with each group comprising five ports (see Figure 2). Table 2 shows the port numbers on an EX8200-40XS line card and the port groups for each set of ports.

Figure 2: Port Numbering and Port Groups on a 40-port SFP+ Line Card

The ports in each port group share 10 gigabits of bandwidth. Thus, you can transmit up to 10 gigabits of traffic through a port group without packet drop.

The oversubscription ratios for 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.
• To understand how CoS queues are handled on these line cards, see Understanding CoS Queues on EX8200 Line Cards That Include Oversubscribed Ports.
• To see how to configure a different scheduler map for the ports in a group, see Defining CoS Schedulers (CLI Procedure)