vxlan interface attrs missing unicast or multicast flag

[fqucuo]

is there any way to find out which cast mode the vxlan interface used by pyroute2？

Two vxlan interfaces: eno1.4096, eno1.4097
eno1.4096 use unicast
eno1.4097 use multicast

ndb.interfaces['eno1.4096']
{'alt_ifname_list': [], 'state': 'up', 'target': 'localhost', 'tflags': 0, 'family': 0, 'ifi_type': 1, 'index': 5708, 'flags': 69699, 'change': 1, 'address': '5a:ab:f3:e7:bb:63', 'broadcast': 'ff:ff:ff:ff:ff:ff', 'ifname': 'eno1.4096', 'mtu': 1450, 'qdisc': 'noqueue', 'txqlen': 1000, 'operstate': 'UNKNOWN', 'linkmode': 0, 'ifalias': None, 'group': 0, 'promiscuity': 0, 'num_tx_queues': 1, 'num_rx_queues': 1, 'proto_down': 0, 'gso_max_segs': 64, 'gso_max_size': 64000, 'carrier_up_count': 0, 'carrier_down_count': 0, 'min_mtu': 68, 'max_mtu': 65535, 'kind': 'vxlan', 'link': None, 'master': None, 'net_ns_pid': None, 'num_vf': None, 'ext_mask': None, 'carrier': 1, 'carrier_changes': 0, 'link_netnsid': None, 'phys_port_name': None, 'event': None, 'new_netnsid': None, 'if_netnsid': None, 'new_ifindex': None, 'alt_ifname': None, 'parent_dev_name': None, 'parent_dev_bus_name': None, 'gro_max_size': None, 'tso_max_size': None, 'tso_max_segs': None, 'slave_kind': None, 'xdp_attached': None, 'xdp_flags': None, 'xdp_prog_id': None, 'xdp_drv_prog_id': None, 'xdp_skb_prog_id': None, 'xdp_hw_prog_id': None, 'vxlan_id': 4096, 'vxlan_group': '239.0.0.1', 'vxlan_link': 4, 'vxlan_local': None, 'vxlan_ttl': 0, 'vxlan_tos': 0, 'vxlan_learning': 1, 'vxlan_ageing': 300, 'vxlan_limit': 0, 'vxlan_proxy': 0, 'vxlan_rsc': 0, 'vxlan_l2miss': 0, 'vxlan_l3miss': 0, 'vxlan_port': 4789, 'vxlan_group6': None, 'vxlan_local6': None, 'vxlan_udp_csum': 1, 'vxlan_udp_zero_csum6_tx': 0, 'vxlan_udp_zero_csum6_rx': 0, 'vxlan_remcsum_tx': 0, 'vxlan_remcsum_rx': 0, 'vxlan_collect_metadata': 0, 'vxlan_label': 0, 'vxlan_df': None}

ndb.interfaces['eno1.4097']
{'alt_ifname_list': [], 'state': 'up', 'target': 'localhost', 'tflags': 0, 'family': 0, 'ifi_type': 1, 'index': 5709, 'flags': 69699, 'change': 1, 'address': 'e6:6b:78:99:0a:b1', 'broadcast': 'ff:ff:ff:ff:ff:ff', 'ifname': 'eno1.4097', 'mtu': 1450, 'qdisc': 'noqueue', 'txqlen': 1000, 'operstate': 'UNKNOWN', 'linkmode': 0, 'ifalias': None, 'group': 0, 'promiscuity': 0, 'num_tx_queues': 1, 'num_rx_queues': 1, 'proto_down': 0, 'gso_max_segs': 64, 'gso_max_size': 64000, 'carrier_up_count': 0, 'carrier_down_count': 0, 'min_mtu': 68, 'max_mtu': 65535, 'kind': 'vxlan', 'link': None, 'master': None, 'net_ns_pid': None, 'num_vf': None, 'ext_mask': None, 'carrier': 1, 'carrier_changes': 0, 'link_netnsid': None, 'phys_port_name': None, 'event': None, 'new_netnsid': None, 'if_netnsid': None, 'new_ifindex': None, 'alt_ifname': None, 'parent_dev_name': None, 'parent_dev_bus_name': None, 'gro_max_size': None, 'tso_max_size': None, 'tso_max_segs': None, 'slave_kind': None, 'xdp_attached': None, 'xdp_flags': None, 'xdp_prog_id': None, 'xdp_drv_prog_id': None, 'xdp_skb_prog_id': None, 'xdp_hw_prog_id': None, 'vxlan_id': 4097, 'vxlan_group': '192.168.100.2', 'vxlan_link': 4, 'vxlan_local': None, 'vxlan_ttl': 0, 'vxlan_tos': 0, 'vxlan_learning': 1, 'vxlan_ageing': 300, 'vxlan_limit': 0, 'vxlan_proxy': 0, 'vxlan_rsc': 0, 'vxlan_l2miss': 0, 'vxlan_l3miss': 0, 'vxlan_port': 4789, 'vxlan_group6': None, 'vxlan_local6': None, 'vxlan_udp_csum': 1, 'vxlan_udp_zero_csum6_tx': 0, 'vxlan_udp_zero_csum6_rx': 0, 'vxlan_remcsum_tx': 0, 'vxlan_remcsum_rx': 0, 'vxlan_collect_metadata': 0, 'vxlan_label': 0, 'vxlan_df': None}

ipr.get_links(ifname='eno1.4096')
{'family': 0, '__align': (), 'ifi_type': 1, 'index': 5708, 'flags': 69699, 'change': 0, 'attrs': [('IFLA_IFNAME', 'eno1.4096'), ('IFLA_TXQLEN', 1000), ('IFLA_OPERSTATE', 'UNKNOWN'), ('IFLA_LINKMODE', 0), ('IFLA_MTU', 1450), ('IFLA_MIN_MTU', 68), ('IFLA_MAX_MTU', 65535), ('IFLA_GROUP', 0), ('IFLA_PROMISCUITY', 0), ('IFLA_NUM_TX_QUEUES', 1), ('IFLA_GSO_MAX_SEGS', 64), ('IFLA_GSO_MAX_SIZE', 64000), ('IFLA_NUM_RX_QUEUES', 1), ('IFLA_CARRIER', 1), ('IFLA_QDISC', 'noqueue'), ('IFLA_IFALIAS', ''), ('IFLA_CARRIER_CHANGES', 0), ('IFLA_PROTO_DOWN', 0), ('IFLA_CARRIER_UP_COUNT', 0), ('IFLA_CARRIER_DOWN_COUNT', 0), ('IFLA_MAP', {'mem_start': 0, 'mem_end': 0, 'base_addr': 0, 'irq': 0, 'dma': 0, 'port': 0}), ('IFLA_ADDRESS', '5a:ab:f3:e7:bb:63'), ('IFLA_BROADCAST', 'ff:ff:ff:ff:ff:ff'), ('IFLA_PAD', ''), ('IFLA_STATS64', {'rx_packets': 0, 'tx_packets': 13, 'rx_bytes': 0, 'tx_bytes': 824, 'rx_errors': 0, 'tx_errors': 0, 'rx_dropped': 0, 'tx_dropped': 0, 'multicast': 0, 'collisions': 0, 'rx_length_errors': 0, 'rx_over_errors': 0, 'rx_crc_errors': 0, 'rx_frame_errors': 0, 'rx_fifo_errors': 0, 'rx_missed_errors': 0, 'tx_aborted_errors': 0, 'tx_carrier_errors': 0, 'tx_fifo_errors': 0, 'tx_heartbeat_errors': 0, 'tx_window_errors': 0, 'rx_compressed': 0, 'tx_compressed': 0}), ('IFLA_STATS', {'rx_packets': 0, 'tx_packets': 13, 'rx_bytes': 0, 'tx_bytes': 824, 'rx_errors': 0, 'tx_errors': 0, 'rx_dropped': 0, 'tx_dropped': 0, 'multicast': 0, 'collisions': 0, 'rx_length_errors': 0, 'rx_over_errors': 0, 'rx_crc_errors': 0, 'rx_frame_errors': 0, 'rx_fifo_errors': 0, 'rx_missed_errors': 0, 'tx_aborted_errors': 0, 'tx_carrier_errors': 0, 'tx_fifo_errors': 0, 'tx_heartbeat_errors': 0, 'tx_window_errors': 0, 'rx_compressed': 0, 'tx_compressed': 0}), ('IFLA_XDP', {'attrs': [('IFLA_XDP_ATTACHED', None)]}), ('IFLA_LINKINFO', {'attrs': [('IFLA_INFO_KIND', 'vxlan'), ('IFLA_INFO_DATA', {'attrs': [('IFLA_VXLAN_ID', 4096), ('IFLA_VXLAN_GROUP', '239.0.0.1'), ('IFLA_VXLAN_LINK', 4), ('IFLA_VXLAN_TTL', 0), ('IFLA_VXLAN_TTL_INHERIT', True), ('IFLA_VXLAN_TOS', 0), ('IFLA_VXLAN_LABEL', 0), ('IFLA_VXLAN_LEARNING', 1), ('IFLA_VXLAN_PROXY', 0), ('IFLA_VXLAN_RSC', 0), ('IFLA_VXLAN_L2MISS', 0), ('IFLA_VXLAN_L3MISS', 0), ('IFLA_VXLAN_COLLECT_METADATA', 0), ('IFLA_VXLAN_AGEING', 300), ('IFLA_VXLAN_LIMIT', 0), ('IFLA_VXLAN_PORT', 4789), ('IFLA_VXLAN_UDP_CSUM', 1), ('IFLA_VXLAN_UDP_ZERO_CSUM6_TX', 0), ('IFLA_VXLAN_UDP_ZERO_CSUM6_RX', 0), ('IFLA_VXLAN_REMCSUM_TX', 0), ('IFLA_VXLAN_REMCSUM_RX', 0), ('IFLA_VXLAN_PORT_RANGE', {'low': 0, 'high': 0})]})]}), ('IFLA_AF_SPEC', {'attrs': [('AF_INET', {'dummy': 65668, 'forwarding': 1, 'mc_forwarding': 0, 'proxy_arp': 0, 'accept_redirects': 0, 'secure_redirects': 0, 'send_redirects': 0, 'shared_media': 1, 'rp_filter': 1, 'accept_source_route': 0, 'bootp_relay': 0, 'log_martians': 0, 'tag': 0, 'arpfilter': 0, 'medium_id': 0, 'noxfrm': 0, 'nopolicy': 0, 'force_igmp_version': 0, 'arp_announce': 0, 'arp_ignore': 0, 'promote_secondaries': 0, 'arp_accept': 0, 'arp_notify': 0, 'accept_local': 0, 'src_vmark': 0, 'proxy_arp_pvlan': 0, 'route_localnet': 0, 'igmpv2_unsolicited_report_interval': 10000, 'igmpv3_unsolicited_report_interval': 1000}), ('AF_INET6', {'attrs': [('IFLA_INET6_FLAGS', 2147483664), ('IFLA_INET6_CACHEINFO', {'max_reasm_len': 65535, 'tstamp': 154155502, 'reachable_time': 28800, 'retrans_time': 1000}), ('IFLA_INET6_CONF', {'forwarding': 0, 'hop_limit': 64, 'mtu': 1450, 'accept_ra': 1, 'accept_redirects': 0, 'autoconf': 0, 'dad_transmits': 1, 'router_solicitations': 4294967295, 'router_solicitation_interval': 4000, 'router_solicitation_delay': 1000, 'use_tempaddr': 0, 'temp_valid_lft': 604800, 'temp_preferred_lft': 86400, 'regen_max_retry': 3, 'max_desync_factor': 600, 'max_addresses': 16, 'force_mld_version': 0, 'accept_ra_defrtr': 1, 'accept_ra_pinfo': 1, 'accept_ra_rtr_pref': 1, 'router_probe_interval': 60000, 'accept_ra_rt_info_max_plen': 0, 'proxy_ndp': 0, 'optimistic_dad': 0, 'accept_source_route': 0, 'mc_forwarding': 0, 'disable_ipv6': 0, 'accept_dad': 1, 'force_tllao': 0, 'ndisc_notify': 0}), ('IFLA_INET6_STATS', {'num': 37, 'inpkts': 0, 'inoctets': 0, 'indelivers': 0, 'outforwdatagrams': 0, 'outpkts': 13, 'outoctets': 824, 'inhdrerrors': 0, 'intoobigerrors': 0, 'innoroutes': 0, 'inaddrerrors': 0, 'inunknownprotos': 0, 'intruncatedpkts': 0, 'indiscards': 0, 'outdiscards': 0, 'outnoroutes': 0, 'reasmtimeout': 0, 'reasmreqds': 0, 'reasmoks': 0, 'reasmfails': 0, 'fragoks': 0, 'fragfails': 0, 'fragcreates': 0, 'inmcastpkts': 0, 'outmcastpkts': 13, 'inbcastpkts': 0, 'outbcastpkts': 0, 'inmcastoctets': 0, 'outmcastoctets': 824, 'inbcastoctets': 0, 'outbcastoctets': 0, 'csumerrors': 0, 'noectpkts': 0, 'ect1pkts': 0, 'ect0pkts': 0, 'cepkts': 0}), ('IFLA_INET6_ICMP6STATS', {'num': 6, 'inmsgs': 0, 'inerrors': 0, 'outmsgs': 13, 'outerrors': 0, 'csumerrors': 0}), ('IFLA_INET6_TOKEN', '::'), ('IFLA_INET6_ADDR_GEN_MODE', 0)]})]})], 'header': {'length': 1552, 'type': 16, 'flags': 2, 'sequence_number': 270, 'pid': 2648916503, 'error': None, 'target': 'localhost', 'stats': Stats(qsize=0, delta=0, delay=0)}, 'state': 'up', 'event': 'RTM_NEWLINK'}

ipr.get_links(ifname='eno1.4097')
{'family': 0, '__align': (), 'ifi_type': 1, 'index': 5709, 'flags': 69699, 'change': 0, 'attrs': [('IFLA_IFNAME', 'eno1.4097'), ('IFLA_TXQLEN', 1000), ('IFLA_OPERSTATE', 'UNKNOWN'), ('IFLA_LINKMODE', 0), ('IFLA_MTU', 1450), ('IFLA_MIN_MTU', 68), ('IFLA_MAX_MTU', 65535), ('IFLA_GROUP', 0), ('IFLA_PROMISCUITY', 0), ('IFLA_NUM_TX_QUEUES', 1), ('IFLA_GSO_MAX_SEGS', 64), ('IFLA_GSO_MAX_SIZE', 64000), ('IFLA_NUM_RX_QUEUES', 1), ('IFLA_CARRIER', 1), ('IFLA_QDISC', 'noqueue'), ('IFLA_IFALIAS', ''), ('IFLA_CARRIER_CHANGES', 0), ('IFLA_PROTO_DOWN', 0), ('IFLA_CARRIER_UP_COUNT', 0), ('IFLA_CARRIER_DOWN_COUNT', 0), ('IFLA_MAP', {'mem_start': 0, 'mem_end': 0, 'base_addr': 0, 'irq': 0, 'dma': 0, 'port': 0}), ('IFLA_ADDRESS', 'e6:6b:78:99:0a:b1'), ('IFLA_BROADCAST', 'ff:ff:ff:ff:ff:ff'), ('IFLA_PAD', ''), ('IFLA_STATS64', {'rx_packets': 0, 'tx_packets': 11, 'rx_bytes': 0, 'tx_bytes': 712, 'rx_errors': 0, 'tx_errors': 0, 'rx_dropped': 0, 'tx_dropped': 0, 'multicast': 0, 'collisions': 0, 'rx_length_errors': 0, 'rx_over_errors': 0, 'rx_crc_errors': 0, 'rx_frame_errors': 0, 'rx_fifo_errors': 0, 'rx_missed_errors': 0, 'tx_aborted_errors': 0, 'tx_carrier_errors': 0, 'tx_fifo_errors': 0, 'tx_heartbeat_errors': 0, 'tx_window_errors': 0, 'rx_compressed': 0, 'tx_compressed': 0}), ('IFLA_STATS', {'rx_packets': 0, 'tx_packets': 11, 'rx_bytes': 0, 'tx_bytes': 712, 'rx_errors': 0, 'tx_errors': 0, 'rx_dropped': 0, 'tx_dropped': 0, 'multicast': 0, 'collisions': 0, 'rx_length_errors': 0, 'rx_over_errors': 0, 'rx_crc_errors': 0, 'rx_frame_errors': 0, 'rx_fifo_errors': 0, 'rx_missed_errors': 0, 'tx_aborted_errors': 0, 'tx_carrier_errors': 0, 'tx_fifo_errors': 0, 'tx_heartbeat_errors': 0, 'tx_window_errors': 0, 'rx_compressed': 0, 'tx_compressed': 0}), ('IFLA_XDP', {'attrs': [('IFLA_XDP_ATTACHED', None)]}), ('IFLA_LINKINFO', {'attrs': [('IFLA_INFO_KIND', 'vxlan'), ('IFLA_INFO_DATA', {'attrs': [('IFLA_VXLAN_ID', 4097), ('IFLA_VXLAN_GROUP', '192.168.100.2'), ('IFLA_VXLAN_LINK', 4), ('IFLA_VXLAN_TTL', 0), ('IFLA_VXLAN_TTL_INHERIT', True), ('IFLA_VXLAN_TOS', 0), ('IFLA_VXLAN_LABEL', 0), ('IFLA_VXLAN_LEARNING', 1), ('IFLA_VXLAN_PROXY', 0), ('IFLA_VXLAN_RSC', 0), ('IFLA_VXLAN_L2MISS', 0), ('IFLA_VXLAN_L3MISS', 0), ('IFLA_VXLAN_COLLECT_METADATA', 0), ('IFLA_VXLAN_AGEING', 300), ('IFLA_VXLAN_LIMIT', 0), ('IFLA_VXLAN_PORT', 4789), ('IFLA_VXLAN_UDP_CSUM', 1), ('IFLA_VXLAN_UDP_ZERO_CSUM6_TX', 0), ('IFLA_VXLAN_UDP_ZERO_CSUM6_RX', 0), ('IFLA_VXLAN_REMCSUM_TX', 0), ('IFLA_VXLAN_REMCSUM_RX', 0), ('IFLA_VXLAN_PORT_RANGE', {'low': 0, 'high': 0})]})]}), ('IFLA_AF_SPEC', {'attrs': [('AF_INET', {'dummy': 65668, 'forwarding': 1, 'mc_forwarding': 0, 'proxy_arp': 0, 'accept_redirects': 0, 'secure_redirects': 0, 'send_redirects': 0, 'shared_media': 1, 'rp_filter': 1, 'accept_source_route': 0, 'bootp_relay': 0, 'log_martians': 0, 'tag': 0, 'arpfilter': 0, 'medium_id': 0, 'noxfrm': 0, 'nopolicy': 0, 'force_igmp_version': 0, 'arp_announce': 0, 'arp_ignore': 0, 'promote_secondaries': 0, 'arp_accept': 0, 'arp_notify': 0, 'accept_local': 0, 'src_vmark': 0, 'proxy_arp_pvlan': 0, 'route_localnet': 0, 'igmpv2_unsolicited_report_interval': 10000, 'igmpv3_unsolicited_report_interval': 1000}), ('AF_INET6', {'attrs': [('IFLA_INET6_FLAGS', 2147483664), ('IFLA_INET6_CACHEINFO', {'max_reasm_len': 65535, 'tstamp': 154192641, 'reachable_time': 21492, 'retrans_time': 1000}), ('IFLA_INET6_CONF', {'forwarding': 0, 'hop_limit': 64, 'mtu': 1450, 'accept_ra': 1, 'accept_redirects': 0, 'autoconf': 0, 'dad_transmits': 1, 'router_solicitations': 4294967295, 'router_solicitation_interval': 4000, 'router_solicitation_delay': 1000, 'use_tempaddr': 0, 'temp_valid_lft': 604800, 'temp_preferred_lft': 86400, 'regen_max_retry': 3, 'max_desync_factor': 600, 'max_addresses': 16, 'force_mld_version': 0, 'accept_ra_defrtr': 1, 'accept_ra_pinfo': 1, 'accept_ra_rtr_pref': 1, 'router_probe_interval': 60000, 'accept_ra_rt_info_max_plen': 0, 'proxy_ndp': 0, 'optimistic_dad': 0, 'accept_source_route': 0, 'mc_forwarding': 0, 'disable_ipv6': 0, 'accept_dad': 1, 'force_tllao': 0, 'ndisc_notify': 0}), ('IFLA_INET6_STATS', {'num': 37, 'inpkts': 0, 'inoctets': 0, 'indelivers': 0, 'outforwdatagrams': 0, 'outpkts': 11, 'outoctets': 712, 'inhdrerrors': 0, 'intoobigerrors': 0, 'innoroutes': 0, 'inaddrerrors': 0, 'inunknownprotos': 0, 'intruncatedpkts': 0, 'indiscards': 0, 'outdiscards': 0, 'outnoroutes': 0, 'reasmtimeout': 0, 'reasmreqds': 0, 'reasmoks': 0, 'reasmfails': 0, 'fragoks': 0, 'fragfails': 0, 'fragcreates': 0, 'inmcastpkts': 0, 'outmcastpkts': 11, 'inbcastpkts': 0, 'outbcastpkts': 0, 'inmcastoctets': 0, 'outmcastoctets': 712, 'inbcastoctets': 0, 'outbcastoctets': 0, 'csumerrors': 0, 'noectpkts': 0, 'ect1pkts': 0, 'ect0pkts': 0, 'cepkts': 0}), ('IFLA_INET6_ICMP6STATS', {'num': 6, 'inmsgs': 0, 'inerrors': 0, 'outmsgs': 11, 'outerrors': 0, 'csumerrors': 0}), ('IFLA_INET6_TOKEN', '::'), ('IFLA_INET6_ADDR_GEN_MODE', 0)]})]})], 'header': {'length': 1552, 'type': 16, 'flags': 2, 'sequence_number': 271, 'pid': 2648916503, 'error': None, 'target': 'localhost', 'stats': Stats(qsize=0, delta=0, delay=0)}, 'state': 'up', 'event': 'RTM_NEWLINK'}

ip -d a s eno1.4096

5708: eno1.4096: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN group default qlen 1000
    link/ether 5a:ab:f3:e7:bb:63 brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68 maxmtu 65535 
    vxlan id 4096 group 239.0.0.1 dev eno1 srcport 0 0 dstport 4789 ttl auto ageing 300 udpcsum noudp6zerocsumtx noudp6zerocsumrx numtxqueues 1 numrxqueues 1 gso_max_size 64000 gso_max_segs 64 
    inet6 fe80::58ab:f3ff:fee7:bb63/64 scope link 
       valid_lft forever preferred_lft forever

ip -d a s eno1.4097

5709: eno1.4097: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN group default qlen 1000
    link/ether e6:6b:78:99:0a:b1 brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68 maxmtu 65535 
    vxlan id 4097 remote 192.168.100.2 dev eno1 srcport 0 0 dstport 4789 ttl auto ageing 300 udpcsum noudp6zerocsumtx noudp6zerocsumrx numtxqueues 1 numrxqueues 1 gso_max_size 64000 gso_max_segs 64 
    inet6 fe80::e46b:78ff:fe99:ab1/64 scope link 
       valid_lft forever preferred_lft forever

Compare ndb outputs or ipr outputs, i can't find out which cast mode the vxlan interface used, but use ip command, i can find group 239.0.0.1 and remote 192.168.100.2 to figure out which cast mode it used.

My problem is: is there any way to find out which cast mode the vxlan interface used by pyroute2？

Thanks a lot!