Generating ifIndexes for various interfaces

To generate ifIndex for a specific interface, perform the following steps.

Enter SLX-OS Linux shell from privileged EXEC mode.
```
device# start-shell
```

Retrieve syntax to find available options to generate ifIndex.

[admin@SLX]# /fabos/cliexec/ifindex_gen.py -h
usage: ifindex_gen.py [-h] -i INTF_TYPE [-t LC_TYPE] [-m MODE] [-s SLOT]
                      [-p PORT] [-sp SUB_PORT] [-lp LAG_PORT]
                      [-vb VE_BRIDGE_ID] [-vi VE_INTF_ID] [-tt TUNNEL_TYPE]
                      [-ti TUNNEL_ID] [-lbi LB_INTF_ID] [-mi MGMT_INTF_ID]
                      [-d DISP_MODE]
arguments:
-h, --help        show this help message and exit 
-i INTF_TYPE      Interface type: [phy (physical) | lag | ve | tunnel | lb 
                  (loopback) | mgmt (management)] 
-t LC_TYPE        LC type: [72x10G | 36x100G]                             
-m MODE           PortGroup Mode: [40g | 100g] (required when LC type is  
                  36x100G) 
-s SLOT           Slot #: [1-8]                                           
-p PORT           Port #: [1-72] for 72x10G, [1-60] for 36x100G LC type   
-sp SUB_PORT      Sub Port #: [1-4] for break-out ports (required when LC 
                  type is 36x100G, PortGroup Mode is 40g and break-out is 
                  enabled)                                                 
-lp LAG_PORT      LAG Port #: [1-512] 
-vb VE_BRIDGE_ID  VE Bridge ID: [0-255] 
-vi VE_INTF_ID    VE Interface ID: [1-4096] 
-tt TUNNEL_TYPE   Tunnel type: [vxlan | gre | nvgre | mpls] 
-ti TUNNEL_ID     Tunnel ID: [1-1024] 
-lbi LB_INTF_ID   Loopback Interface ID: [1-255] 
-mi MGMT_INTF_ID  Management Interface ID: [1-2] 
-d DISP_MODE      Output Display Mode: [bin | dec | hex | all] (default: 
                  dec)

Note: The parameters -t, -m, -s, -p, and -sp are the sub-options specific to physical interface.

Generate ifIndex for a specific interface. In this example, ifIndex is generated for a physical interface.

[admin@SLX]# /fabos/cliexec/ifindex_gen.py -i physical -t 72x10G -s 2 -p 65 -d all
Decimal :  413171855
Hex     :  18a0808f
Binary  :  00011000101000001000000010001111