某路由器上有如下配置: ip vpn-instance vpna ipv4-familyRoute-distinguisher 200:1
Vpn-target 300:1 export-extcommnity vpn-target 300:1 import-extcommunity #
Segment-routing ipv6
Encapsulation source-address 2001::1
Locator vpnl ipv6-prefix 201:1::64 static 32 #
Bgp 100 #
Ipv4-family vpn-instance vpnaimport-route direct
Segment-routing
Ipv6
Locator vpnl
Segment-routing ipv6
Best-effort
那么该路由器为 VPN 实例 vpna 分配的 End. DT4 SID 可能的取值为以下哪一项?