When I try to import existing K8S with only IPv6 on Rancher， got errors following as:
RTNETLINK answers: Network is unreachable
INFO: Environment: CATTLE_ADDRESS= CATTLE_CA_CHECKSUM=36cd95d967a75a163aac1ba836135ae08846a1e9e4e00344be12cbf0d89e34b9 CATTLE_CLUSTER=true CATTLE_CLUSTER_AGENT_PORT=tcp://[2001:db8:42:1::d5f6]:80 CATTLE_CLUSTER_AGENT_PORT_443_TCP=tcp://[2001:db8:42:1::d5f6]:443 CATTLE_CLUSTER_AGENT_PORT_443_TCP_ADDR=2001:db8:42:1::d5f6 CATTLE_CLUSTER_AGENT_PORT_443_TCP_PORT=443 CATTLE_CLUSTER_AGENT_PORT_443_TCP_PROTO=tcp CATTLE_CLUSTER_AGENT_PORT_80_TCP=tcp://[2001:db8:42:1::d5f6]:80 CATTLE_CLUSTER_AGENT_PORT_80_TCP_ADDR=2001:db8:42:1::d5f6 CATTLE_CLUSTER_AGENT_PORT_80_TCP_PORT=80 CATTLE_CLUSTER_AGENT_PORT_80_TCP_PROTO=tcp CATTLE_CLUSTER_AGENT_SERVICE_HOST=2001:db8:42:1::d5f6 CATTLE_CLUSTER_AGENT_SERVICE_PORT=80 CATTLE_CLUSTER_AGENT_SERVICE_PORT_HTTP=80 CATTLE_CLUSTER_AGENT_SERVICE_PORT_HTTPS_INTERNAL=443 CATTLE_CLUSTER_REGISTRY= CATTLE_INGRESS_IP_DOMAIN=sslip.io CATTLE_INSTALL_UUID=1a205246-d0f5-4483-8bf1-942f7231468d CATTLE_INTERNAL_ADDRESS= CATTLE_IS_RKE=false CATTLE_K8S_MANAGED=true CATTLE_NODE_NAME=cattle-cluster-agent-5c4d58f746-jjgl8 CATTLE_RANCHER_WEBHOOK_MIN_VERSION= CATTLE_RANCHER_WEBHOOK_VERSION=2.0.6+up0.3.6 CATTLE_SERVER=https://100.110.141.102:7080 CATTLE_SERVER_VERSION=v2.7.9
INFO: Using resolv.conf: search cattle-system.svc.cluster.local svc.cluster.local cluster.local nameserver 2001:db8:42:1::a options ndots:5
ERROR: https://100.110.141.102:7080/ping is not accessible (Failed to connect to 100.110.141.102 port 7080 after 0 ms: Couldn't connect to server)