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PTX10004 Switch Fabric

The PTX10004 Switch Interface Boards (SIBs) form the switch fabric for the router.

PTX10004 Switch Interface Board Description

Switch Interface Boards (SIBs) create the switch fabric for the PTX10004. The router contains between three and six SIBs that are installed vertically, mid-chassis, between the line cards and the RCBs in the front and the fan trays in the rear.

The SIBs make up the PTX10004 switching plane that supports the 14.4-Tbps line card and operates in Junos OS Evolved systems. Each SIB has four connectors that correspond to a matching connector on one of the four line cards; see Figure 1.

Figure 1: JNP10004 Switch Interface BoardJNP10004 Switch Interface Board
Table 1: SIB Specifications



Operating system

Junos OS Evolved Release 20.4R1 and later

Supported line cards

PTX10K-LC1201-36CD, PTX10K-LC1202-36MR

Number of SIBs required for operation

All systems require a minimum of 3 SIBs; a system populated with 14.4Tbps line cards requires 6 SIBs


9.43 in. (23.95 cm)


1.77 in. (4.48 cm)


13.22 in. (33.02 cm)


9.81 lb (4.45 kg)

SIBs are hot-removable and hot-insertable field-replaceable units (FRUs). They are not visible from the outside of the router chassis. You must remove one of the fan trays to view the SIBs. For instructions on removing the fan trays, see Remove a PTX10004 Fan Tray. The SIBs are numbered SIB0 to SIB5 from left to right. See Figure 2.

Figure 2: SIBs Installed in a PTX10004SIBs Installed in a PTX10004

Fan tray controllers