cisco monitor capture with vpn without pcap file

I have a network with some errors
I connect it remotly using l2tp vpn vpdn
I need trubleshoot it using wireshark
I have config the router with monitor capture to make router get packet
My proplem ia
Monitor capture just work to export data to file and u can get file to wireshark using tftp or ftp or any
The file size is so big
I need router direct send the packets to vpn client to see it with wireshark without get it as file