This object specifies the IPCP DNS option for the dynamic
interface:
'other'
The implementation of this MIB module does not recognize
the configured DNS option.
'accept'
The system accepts any non-zero DNS address form the
peer of a target PPP connection.
'request'
The system requests the DNS address from the peer of a
target PPP connection.
'reject'
The system rejects the DNS option from the peer of a
target PPP connection.
This column is valid only if the 'ipcpDnsOption' bit of the
corresponding instance of cdtPppValid is '1'.