The option of sub after the define ipv4 address provides us the secondaries options.
I haven't found any literature of the maximum numbers of secondaries that you can craft. I'm sure a limitation exists on the max numbers.
Juniper SRX ( support for secondaries exists per-interface, limits are set JunOS version and possible hardware platform model-type )
Cisco ASA ( no support for secondaries per-interface )
Fortinet Fortigate ( max 32 secondaries address per-interfaces )
If you should use secondaries be very carefully and be aware of the limits such as dhcp issues or lack of dhcp-scopes for secondaries.
" In a newly designed network, there's no need for secondaries interfaces or if you need it, your design is probably bad or should be reviewed for possible other designs constraints "
NSE ( Network Security Expert) and Route/Switching Engineer.
kfelix -----a----t---- socpuppets ---dot---com
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