ipv4到ipv6的网关转换，需要对ip层比较了解-ipv4 gateway to ipv6 conversion, the need to understand ip layer

实现了双协议栈的SNMP，能同时兼容IPv4和IPv6两个底层协议。能给IPv6的开发人员提供一定的参考参考作用。 -achieve double the SNMP protocol stack, it could also compatible with IPv4 and IPv6 two underlying agreements. IPv6 can provide developers with a reference references.