Cisco Cisco Prime IP Express 8.3 Technical References

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A two-component 32 bit number, with 16 bits of major version and 16 bits of minor version.
AT_VPNID (vpnid)
A 7-byte standard VPN ID, as defined in RFC 2685.
AT_VPREFIX (prefix-var)
A 1 to 17-octet sequence representing an IPv6 prefix.See RFC 7227, section 5.3.
AT_ZEROSIZE (zero-size)
A sequence of bytes representing certain DHCP options that have an option code and a length, where the length is always
zero.