<!-- include start from accel-ppp/ppp-options-ipv4.xml.i --> <leafNode name="ipv4"> <properties> <help>IPv4 negotiation algorithm</help> <constraint> <regex>(deny|allow)</regex> </constraint> <constraintErrorMessage>invalid value</constraintErrorMessage> <valueHelp> <format>deny</format> <description>Do not negotiate IPv4</description> </valueHelp> <valueHelp> <format>allow</format> <description>Negotiate IPv4 only if client requests</description> </valueHelp> <completionHelp> <list>deny allow</list> </completionHelp> </properties> <defaultValue>allow</defaultValue> </leafNode> <!-- include end -->