below is the configuration for this interface:
interface Eth-Trunk1.100
ip address 185.241.224.36 255.255.255.254
encapsulation qinq-termination rt-protocol
qinq termination pe-vid 100 ce-vid 4094
isis enable 10
isis circuit-type p2p
isis authentication-mode hmac-sha256 key-id 1 cipher %^%#76$b,YPxJ1Ej5X>L39.ZwdeG;Gg'#V_<KCRhC4e6X{|.89Ve0@B@"0*&3l`Ciw!'A$-<V9nU{Y67n@QJ%^%#
isis ppp-negotiation 3-way only
mpls
mpls ldp
#
when the link go up, we found that even the ARP is not learned, the ARP is incompleted.
after we looked into the product documentation, we test a command:
"arp broadcast enable",
we tried this command, and found that it works after configure this command.
this is a typical case. when we configured a VLAN tag termination sub-interface, we always need to configure this command, otherwise, it may has performance problem.