l2tp client without user name

how connect l2tp client without user name on mikrotik router


exm:
vpdn-group 1
accept-dialin
protocol l2tp
virtual-template 1
local name lns
no l2tp tunnel authentication
exit

Link https://www.manualslib.com/manual/789223/Zte-Zxr10.html?page=119

Cannot be done, MikroTik configures L2TP based on username.

l2tp tunnel authentication
Purpose Use this command to authenticate peers when the tunnel is configured
for negotiation.
Command Modes VPDN group configuration
Syntax l2tp tunnel authentication
no l2tp tunnel authentication

https://www.manualslib.com/manual/789223/Zte-Zxr10.html?page=119

And also please go through GGSN end configuration as GGSN is acting as LAC


Please find below the sample configuration at GGSN end

l2tp hello retransmit-attempts 3 retransmit-timeout 3 setup-timeout 40

l2tp lac-ip-address <xx.yy.zz.ww> vrf global host

l2tp lns-ip-address <aa.bb.cc.dd> string weight 100

l2tp lns-ip-address <ee.ff.gg.hh> string default weight 100

l2tp multi-lns normal

l2tp proxy disable

l2tp sequencing disable

l2tp session retransmit-attempts 3 retransmit-timeout 3 setup-timeout 60

l2tp tunnel-authentication disable

l2tp tunnel retransmit-attempts 3 retransmit-timeout 3 clear-tunnel-wait-timeout 3 setup-timeout 60

l2tp tunnel-id-number 2

l2tp tunnel-receive-window 20

Those commands are for Cisco.
When the client side is on MikroTik, just put some dummy values in user and password and see how it goes.
For server side, it is not possible I think.