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Understanding Interfaces on the QFabric System

This topic describes:

Four-Level Interface Naming Convention

When you configure an interface on the QFabric system, the interface name needs to follow a four-level naming convention that enables you to identify an interface as part of either a Node device or a Node group. Include the name of the network or server Node group at the beginning of the interface name.

The four-level interface naming convention is:

device-name:type-fpc/pic/port

where device-name is the name of the Node device or Node group. The remainder of the naming convention elements are the same as those in the QFX3500 switch interface naming convention.

An example of a four-level interface name is:

node2:xe-0/0/2

QSFP+ Interfaces

The QFX3500 Node device provides four 40-Gbps QSFP+ (quad small form-factor pluggable plus) interfaces (labeled Q0 through Q3) for uplink connections between your Node device and your Interconnect devices.

The QFX3600 Node device provides 16 40-Gbps QSFP+ interfaces. By default, 4 interfaces (labeled Q0 through Q3) are configured for 40-Gbps uplink connections between your Node device and your Interconnect devices, and 12 interfaces (labeled Q4 through Q15) use QSFP+ direct-attach copper (DAC) breakout cables or QSFP+ transceivers with fiber breakout cables to support 48 10-Gigabit Ethernet interfaces for connections to either endpoint systems (such as servers and storage devices) or external networks. Optionally, you can choose to configure the first eight interfaces (Q0 through Q7) for uplink connections between your Node device and your Interconnect devices, and interfaces Q2 through Q15 for 10-Gigabit Ethernet or 40-Gigabit Ethernet connections to either endpoint systems or external networks (see Configuring the Port Type on QFX3600 Node Devices). Table 1 shows the port mappings for QFX3600 Node devices.

Table 1: QFX3600 Node Device Port Mappings

Port Number

10-Gigabit Ethernet Interfaces (On PIC 0)

40-Gigabit Ethernet Interfaces (On PIC 1)

40-Gigabit Data Plane Uplink Interfaces (On PIC 1)

Q0

Not supported on this port

xle-0/1/0

fte-0/1/0

Q1

Not supported on this port

xle-0/1/1

fte-0/1/1

Q2

xe-0/0/8

xe-0/0/9

xe-0/0/10

xe-0/0/11

xle-0/1/2

fte-0/1/2

Q3

xe-0/0/12

xe-0/0/13

xe-0/0/14

xe-0/0/15

xle-0/1/3

fte-0/1/3

Q4

xe-0/0/16

xe-0/0/17

xe-0/0/18

xe-0/0/19

xle-0/1/4

fte-0/1/4

Q5

xe-0/0/20

xe-0/0/21

xe-0/0/22

xe-0/0/23

xle-0/1/5

fte-0/1/5

Q6

xe-0/0/24

xe-0/0/25

xe-0/0/26

xe-0/0/27

xle-0/1/6

fte-0/1/6

Q7

xe-0/0/28

xe-0/0/29

xe-0/0/30

xe-0/0/31

xle-0/1/7

fte-0/1/7

Q8

xe-0/0/32

xe-0/0/33

xe-0/0/34

xe-0/0/35

xle-0/1/8

Not supported on this port

Q9

xe-0/0/36

xe-0/0/37

xe-0/0/38

xe-0/0/39

xle-0/1/9

Not supported on this port

Q10

xe-0/0/40

xe-0/0/41

xe-0/0/42

xe-0/0/43

xle-0/1/10

Not supported on this port

Q11

xe-0/0/44

xe-0/0/45

xe-0/0/46

xe-0/0/47

xle-0/1/11

Not supported on this port

Q12

xe-0/0/48

xe-0/0/49

xe-0/0/50

xe-0/0/51

xle-0/1/12

Not supported on this port

Q13

xe-0/0/52

xe-0/0/53

xe-0/0/54

xe-0/0/55

xle-0/1/13

Not supported on this port

Q14

xe-0/0/56

xe-0/0/57

xe-0/0/58

xe-0/0/59

xle-0/1/14

Not supported on this port

Q15

xe-0/0/60

xe-0/0/61

xe-0/0/62

xe-0/0/63

xle-0/1/15

Not supported on this port

The QFX5100-48S Node device provides 48 10-Gigabit Ethernet interfaces and 6 40-Gbps QSFP+ interfaces. By default, 4 interfaces (labeled 48 through 51) are configured for 40-Gbps uplink connections between your Node device and your Interconnect devices, and 2 interfaces (labeled 52 and 53) support 40-Gigabit Ethernet connections to either endpoint systems (such as servers and storage devices) or external networks. Optionally, you can choose to configure the middle two interfaces (50 and 51) for 40-Gigabit Ethernet connections to either endpoint systems or external networks, and you can choose to configure the last two interfaces (52 and 53) for uplink connections between your Node device and your Interconnect devices (see Configuring the QSFP+ Port Type on QFX5100 Devices). Table 2 shows the port mappings for QFX5100-48S Node devices.

Table 2: QFX5100-48S Node Device Port Mappings

Port Number

40-Gigabit Ethernet Interfaces (On PIC 1)

40-Gigabit Data Plane Uplink Interfaces (On PIC 1)

48

Not supported on this PIC

fte-0/1/0

49

Not supported on this PIC

fte-0/1/1

50

xle-0/1/2

fte-0/1/2

51

xle-0/1/3

fte-0/1/3

52

xle-0/1/4

fte-0/1/4

53

xle-0/1/5

fte-0/1/5

Link Aggregation

Link aggregation enables you to create link aggregation groups across Node devices within a network Node group or redundant server Node group. You can include up to eight Ethernet interfaces in a LAG. You can have up to 48 LAGs within a redundant server Node group, and 128 LAGs in a network Node group. To configure a LAG, include the aggregated-devices statement at the [edit chassis node-group node-group-name] hierarchy level and the device-count statement at the [edit chassis node-group node-group-name aggregated-devices ethernet] hierarchy level. Additionally, include any aggregated Ethernet options (minimum-links and link-speed) at the [edit interfaces interface-name aggregated-ether-options] hierarchy level and the 802.3ad statement at the [edit interfaces interface-name ether-options] hierarchy level. To configure the Link Aggregation Control Protocol (LACP), include the lacp statement at the [edit interfaces aggregated-ether-options] hierarchy level.