Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

 

Virtual Chassis Slot Number Mapping for Use with SNMP

 

Junos OS supports the use of SNMP to monitor the routers, switches, and other devices in your network. For example, the Juniper Networks jnxBoxAnatomy enterprise-specific Chassis MIB contains the jnxFruTable object, which shows the status of field-replaceable units (FRUs) in the chassis. Within the jnxFruTable object, the jnxFruSlot object displays the slot number where the FRU is installed.

If you are using the jnxFruSlot object in jnxFruTable to display the slot numbers of line cards installed in a member router of an MX Series Virtual Chassis or a member switch of an EX9200 Virtual Chassis, keep in mind that the offset used for slot numbering in the Virtual Chassis affects the value that appears for the jnxFruSlot object.

Table 1 lists the jnxFruSlot number that appears in the jnxFruTable of the jnxBoxAnatomy MIB, and the corresponding line card physical slot number in each member router of a two-member EX9200 or MX Series Virtual Chassis. For example, a jnxFruSlot value of 15 corresponds to physical slot 3 in member 0 of the Virtual Chassis. A jnxFruSlot value of 30 corresponds to physical slot 6 in member 1 of the Virtual Chassis.

Table 1: jnxFruSlot Numbers and Corresponding Slot Numbers in an MX Series or EX9200 Virtual Chassis

jnxFruSlot Number

Line Card Slot Number

MX Series or EX9200 Virtual Chassis Member ID

Line Cards in MX Series Virtual Chassis Member ID 0 (offset = 12):

12

0

0

13

1

0

14

2

0

15

3

0

16

4

0

17

5

0

18

6

0

19

7

0

20

8

0

21

9

0

22

10

0

23

11

0

Line Cards in MX Series Virtual Chassis Member ID 1 (offset = 24)

24

0

1

25

1

1

26

2

1

27

3

1

28

4

1

29

5

1

30

6

1

31

7

1

32

8

1

33

9

1

34

10

1

35

11

1