This article provides information about how to discover the NetScaler SDX mapping of Virtual Interfaces on VPX to physical interface and ethX port mapping.

SDX Mapping of Virtual Interfaces on VPX to Physical Interface and ethX port mapping

To know the mappings from GUI, navigate to Configuration > Network > Interfaces.

In this example, the VPX interface 10/3 is mapped to the physical interface 10/4 on the SDX appliance. 

To know the mappings from NetScaler Command Line Interface (CLI), run the following command:
 > show interface

 1) Interface 10/3 (10G VF Interface, PF 10/4) #2
 flags=0xe460 <ENABLED, UP, UP, HAMON, 802.1q>
 MTU=1500, native vlan=1, MAC=6e:b6:f5:21:5d:db, uptime 43h03m35s
 Actual: media FIBER, speed 10000, duplex FULL, fctl NONE, throughput 10000
 RX: Pkts(2547925) Bytes(287996153) Errs(0) Drops(527183) Stalls(0)
 TX: Pkts(196) Bytes(8532) Errs(0) Drops(0) Stalls(0)
 NIC: InDisc(0) OutDisc(0) Fctls(0) Stalls(0) Hangs(0) Muted(0)
 Bandwidth thresholds are not set.
 ...

https://docs.netscaler.com/en-us/sdx/current-release/manage-monitor-appliance-network-configuration/managing-interfaces.html#display-the-mapping-of-virtual-interfaces-on-the-vpx-instance-to-the-physical-interfaces