Hello,
Generally speaking, always use "<show command> | display xml rpc" CLI to get a XML RPC:
--- JUNOS 10.4R7.4 built 2011-09-02 05:32:26 UTC
{master}
aarseniev@mx960-re1> ...ve-buffer extensive | display xml rpc
<rpc-reply xmlns:junos="http://xml.juniper.net/junos/10.4R7/junos">
<message>
xml rpc equivalent of this command is not available.
</message>
<cli>
<banner>{master}</banner>
</cli>
</rpc-reply>
Not available in 10.4R7, sorry. Please raise a JTAC case to get this XML RPC added.
HTH
Rgds
Alex