Public bug reported:
Bridges with STP enabled, only if in the non-default namespace,
connecting the nic as a port to the bridge will not add the STP
multicast address to the port nics, causing them to fail in all
important BPDU topology updates. This leads to packet storms,
effectively locking up all connected systems -- all the problems STP is
designed to prevent.
This bug exists in ubuntu's 5.15 generic Jammy and 6.1 22.04c kernels.
100% reproducible. Below you'll see two cases that vary only in that
one takes place in a non-default network namespace. The only material
difference is the nic ports in the non-default namespace lack the STP
bridge multicast address.
Notice in the default namespace, for example, we have:
ip -d link show lan0bridge
31: lan0bridge: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
UP mode DEFAULT group default qlen 1000
link/ether 52:54:e5:79:c5:7a brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68
maxmtu 65535
bridge forward_delay 1500 hello_time 200 max_age 2000 ageing_time 30000
stp_state 1 priority 28 vlan_filtering 0 vlan_protocol 802.1Q bridge_id
001c.52:54:e5:79:c5:7a designated_root 001c.52:54:e5:79:c5:7a root_port 1
root_path_cost 4 topology_change 0 topology_change_detected 0 hello_timer
0.00 tcn_timer 0.00 topology_change_timer 0.00 gc_timer 24.87
vlan_default_pvid 1 vlan_stats_enabled 0 vlan_stats_per_port 0 group_fwd_mask 0
group_address 01:80:c2:00:00:00 mcast_snooping 1 mcast_router 1
mcast_query_use_ifaddr 0 mcast_querier 0 mcast_hash_elasticity 16
mcast_hash_max 4096 mcast_last_member_count 2 mcast_startup_query_count 2
mcast_last_member_interval 100 mcast_membership_interval 26000
mcast_querier_interval 25500 mcast_query_interval 12500
mcast_query_response_interval 1000 mcast_startup_query_interval 3124
mcast_stats_enabled 0 mcast_igmp_version 2 mcast_mld_version 1 nf_call_iptables
0 nf_call_ip6tables 0 nf_call_arptables 0 addrgenmode eui64 numtxqueues 1
numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
And an example port:
ip -d addr show gnv0lan1
32: gnv0lan1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master
lan0bridge state UNKNOWN group default qlen 1000
link/ether 52:54:86:cb:d4:05 brd ff:ff:ff:ff:ff:ff promiscuity 1 minmtu 68
maxmtu 65485
geneve id 7745 remote 192.XXX.XXX.XXx ttl auto dstport 6081 noudpcsum
udp6zerocsumrx
bridge_slave state forwarding priority 32 cost 100 hairpin off guard off
root_block off fastleave off learning on flood on port_id 0x8002 port_no 0x2
designated_port 32770 designated_cost 4 designated_bridge
001c.52:54:e5:79:c5:7a designated_root 0014.52:54:ff:79:8b:4d hold_timer
0.68 message_age_timer 0.00 forward_delay_timer 0.00 topology_change_ack
0 config_pending 0 proxy_arp off proxy_arp_wifi off mcast_router 1
mcast_fast_leave off mcast_flood on mcast_to_unicast off neigh_suppress off
group_fwd_mask 0 group_fwd_mask_str 0x0 vlan_tunnel off isolated off
numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
And the expected
# ip maddr show gnv0lan1
32: gnv0lan1
link 33:33:00:00:00:02 users 2
link 01:00:5e:00:00:01
link 33:33:00:00:00:01
link 01:80:c2:00:00:00 <-- STP multicast address.
...
But in a non-default namespace we have, for example:
root@rssnoc2e0:~# ip netns exec squad0ns ip -d link show sqd0lanbr
20: sqd0lanbr: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1370 qdisc noqueue state
UP mode DEFAULT group default qlen 1000
link/ether 2a:19:e7:b2:98:c6 brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68
maxmtu 65535
bridge forward_delay 1500 hello_time 200 max_age 2000 ageing_time 30000
stp_state 1 priority 10000 vlan_filtering 0 vlan_protocol 802.1Q bridge_id
2710.2a:19:e7:b2:98:c6 designated_root 2710.2a:19:e7:b2:98:c6 root_port 0
root_path_cost 0 topology_change 0 topology_change_detected 0 hello_timer
0.05 tcn_timer 0.00 topology_change_timer 0.00 gc_timer 0.00
vlan_default_pvid 1 vlan_stats_enabled 0 vlan_stats_per_port 0 group_fwd_mask 0
group_address 01:80:c2:00:00:00 mcast_snooping 1 mcast_router 1
mcast_query_use_ifaddr 0 mcast_querier 0 mcast_hash_elasticity 16
mcast_hash_max 4096 mcast_last_member_count 2 mcast_startup_query_count 2
mcast_last_member_interval 100 mcast_membership_interval 26000
mcast_querier_interval 25500 mcast_query_interval 12500
mcast_query_response_interval 1000 mcast_startup_query_interval 3124
mcast_stats_enabled 0 mcast_igmp_version 2 mcast_mld_version 1 nf_call_iptables
0 nf_call_ip6tables 0 nf_call_arptables 0 addrgenmode eui64 numtxqueues 1
numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
And a nic on that bridge:
root@rssnoc2e0:~# ip netns exec squad0ns ip -d link show gnv1lan
21: gnv1lan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1370 qdisc noqueue master
sqd0lanbr state UNKNOWN mode DEFAULT group default qlen 1000
link/ether 4a:cf:01:4b:0a:fd brd ff:ff:ff:ff:ff:ff promiscuity 1 minmtu 68
maxmtu 65485
geneve id 7745 remote 192.XXX.XXX.XXX ttl auto dstport 6081 noudpcsum
udp6zerocsumrx
bridge_slave state forwarding priority 32 cost 2048 hairpin off guard off
root_block off fastleave off learning on flood on port_id 0x8001 port_no 0x1
designated_port 32769 designated_cost 0 designated_bridge
2710.2a:19:e7:b2:98:c6 designated_root 2710.2a:19:e7:b2:98:c6 hold_timer
0.70 message_age_timer 0.00 forward_delay_timer 0.00 topology_change_ack
0 config_pending 0 proxy_arp off proxy_arp_wifi off mcast_router 1
mcast_fast_leave off mcast_flood on mcast_to_unicast off neigh_suppress off
group_fwd_mask 0 group_fwd_mask_str 0x0 vlan_tunnel off isolated off
addrgenmode eui64 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs
65535
And here, we see the STP multicast address is missing:
root@rssnoc2e0:~# ip netns exec squad0ns ip maddr show gnv1lan
21: gnv1lan
link 33:33:00:00:00:01
link 01:00:5e:00:00:01
inet 224.0.0.1
inet6 ff02::1
inet6 ff01::1
root@rssnoc2e0:~#
!! Missing multicast address for STP BPDU reception.
** Affects: linux-signed (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux-signed (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: ubuntu
** Summary changed:
- packet storm as nics in STP enabled bridges lack BDPU maddr 01:80:c2:00:00:00
+ packet storm as nics in STP enabled netns bridges lack BDPU maddr
01:80:c2:00:00:00
** Description changed:
Bridges with STP enabled, only if in the non-default namespace,
connecting the nic as a port to the bridge will not add the STP
multicast address to the port nics, causing them to fail in all
important BPDU topology updates. This leads to packet storms,
effectively locking up all connected systems -- all the problems STP is
designed to prevent.
This bug exists in ubuntu's 5.15 generic Jammy and 6.1 22.04c kernels.
100% reproducible. Below you'll see two cases that vary only in that
one takes place in a non-default network namespace. The only material
difference is the nic ports in the non-default namespace lack the STP
bridge multicast address.
Notice in the default namespace, for example, we have:
-
- ip -d link show lan0bridge
+ ip -d link show lan0bridge
31: lan0bridge: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UP mode DEFAULT group default qlen 1000
- link/ether 52:54:e5:79:c5:7a brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu
68 maxmtu 65535
- bridge forward_delay 1500 hello_time 200 max_age 2000 ageing_time 30000
stp_state 1 priority 28 vlan_filtering 0 vlan_protocol 802.1Q bridge_id
001c.52:54:e5:79:c5:7a designated_root 001c.52:54:e5:79:c5:7a root_port 1
root_path_cost 4 topology_change 0 topology_change_detected 0 hello_timer
0.00 tcn_timer 0.00 topology_change_timer 0.00 gc_timer 24.87
vlan_default_pvid 1 vlan_stats_enabled 0 vlan_stats_per_port 0 group_fwd_mask 0
group_address 01:80:c2:00:00:00 mcast_snooping 1 mcast_router 1
mcast_query_use_ifaddr 0 mcast_querier 0 mcast_hash_elasticity 16
mcast_hash_max 4096 mcast_last_member_count 2 mcast_startup_query_count 2
mcast_last_member_interval 100 mcast_membership_interval 26000
mcast_querier_interval 25500 mcast_query_interval 12500
mcast_query_response_interval 1000 mcast_startup_query_interval 3124
mcast_stats_enabled 0 mcast_igmp_version 2 mcast_mld_version 1 nf_call_iptables
0 nf_call_ip6tables 0 nf_call_arptables 0 addrgenmode eui64 numtxqueues 1
numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
+ link/ether 52:54:e5:79:c5:7a brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu
68 maxmtu 65535
+ bridge forward_delay 1500 hello_time 200 max_age 2000 ageing_time 30000
stp_state 1 priority 28 vlan_filtering 0 vlan_protocol 802.1Q bridge_id
001c.52:54:e5:79:c5:7a designated_root 001c.52:54:e5:79:c5:7a root_port 1
root_path_cost 4 topology_change 0 topology_change_detected 0 hello_timer
0.00 tcn_timer 0.00 topology_change_timer 0.00 gc_timer 24.87
vlan_default_pvid 1 vlan_stats_enabled 0 vlan_stats_per_port 0 group_fwd_mask 0
group_address 01:80:c2:00:00:00 mcast_snooping 1 mcast_router 1
mcast_query_use_ifaddr 0 mcast_querier 0 mcast_hash_elasticity 16
mcast_hash_max 4096 mcast_last_member_count 2 mcast_startup_query_count 2
mcast_last_member_interval 100 mcast_membership_interval 26000
mcast_querier_interval 25500 mcast_query_interval 12500
mcast_query_response_interval 1000 mcast_startup_query_interval 3124
mcast_stats_enabled 0 mcast_igmp_version 2 mcast_mld_version 1 nf_call_iptables
0 nf_call_ip6tables 0 nf_call_arptables 0 addrgenmode eui64 numtxqueues 1
numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
And an example port:
ip -d addr show gnv0lan1
32: gnv0lan1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master
lan0bridge state UNKNOWN group default qlen 1000
- link/ether 52:54:86:cb:d4:05 brd ff:ff:ff:ff:ff:ff promiscuity 1 minmtu
68 maxmtu 65485
- geneve id 7745 remote 192.168.168.129 ttl auto dstport 6081 noudpcsum
udp6zerocsumrx
- bridge_slave state forwarding priority 32 cost 100 hairpin off guard off
root_block off fastleave off learning on flood on port_id 0x8002 port_no 0x2
designated_port 32770 designated_cost 4 designated_bridge
001c.52:54:e5:79:c5:7a designated_root 0014.52:54:ff:79:8b:4d hold_timer
0.68 message_age_timer 0.00 forward_delay_timer 0.00 topology_change_ack
0 config_pending 0 proxy_arp off proxy_arp_wifi off mcast_router 1
mcast_fast_leave off mcast_flood on mcast_to_unicast off neigh_suppress off
group_fwd_mask 0 group_fwd_mask_str 0x0 vlan_tunnel off isolated off
numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
+ link/ether 52:54:86:cb:d4:05 brd ff:ff:ff:ff:ff:ff promiscuity 1 minmtu
68 maxmtu 65485
+ geneve id 7745 remote 192.XXX.XXX.XXx ttl auto dstport 6081 noudpcsum
udp6zerocsumrx
+ bridge_slave state forwarding priority 32 cost 100 hairpin off guard off
root_block off fastleave off learning on flood on port_id 0x8002 port_no 0x2
designated_port 32770 designated_cost 4 designated_bridge
001c.52:54:e5:79:c5:7a designated_root 0014.52:54:ff:79:8b:4d hold_timer
0.68 message_age_timer 0.00 forward_delay_timer 0.00 topology_change_ack
0 config_pending 0 proxy_arp off proxy_arp_wifi off mcast_router 1
mcast_fast_leave off mcast_flood on mcast_to_unicast off neigh_suppress off
group_fwd_mask 0 group_fwd_mask_str 0x0 vlan_tunnel off isolated off
numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
And the expected
# ip maddr show gnv0lan1
32: gnv0lan1
- link 33:33:00:00:00:02 users 2
- link 01:00:5e:00:00:01
- link 33:33:00:00:00:01
- link 01:80:c2:00:00:00 <-- STP multicast address.
+ link 33:33:00:00:00:02 users 2
+ link 01:00:5e:00:00:01
+ link 33:33:00:00:00:01
+ link 01:80:c2:00:00:00 <-- STP multicast address.
...
-
But in a non-default namespace we have, for example:
root@rssnoc2e0:~# ip netns exec squad0ns ip -d link show sqd0lanbr
20: sqd0lanbr: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1370 qdisc noqueue state
UP mode DEFAULT group default qlen 1000
- link/ether 2a:19:e7:b2:98:c6 brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu
68 maxmtu 65535
- bridge forward_delay 1500 hello_time 200 max_age 2000 ageing_time 30000
stp_state 1 priority 10000 vlan_filtering 0 vlan_protocol 802.1Q bridge_id
2710.2a:19:e7:b2:98:c6 designated_root 2710.2a:19:e7:b2:98:c6 root_port 0
root_path_cost 0 topology_change 0 topology_change_detected 0 hello_timer
0.05 tcn_timer 0.00 topology_change_timer 0.00 gc_timer 0.00
vlan_default_pvid 1 vlan_stats_enabled 0 vlan_stats_per_port 0 group_fwd_mask 0
group_address 01:80:c2:00:00:00 mcast_snooping 1 mcast_router 1
mcast_query_use_ifaddr 0 mcast_querier 0 mcast_hash_elasticity 16
mcast_hash_max 4096 mcast_last_member_count 2 mcast_startup_query_count 2
mcast_last_member_interval 100 mcast_membership_interval 26000
mcast_querier_interval 25500 mcast_query_interval 12500
mcast_query_response_interval 1000 mcast_startup_query_interval 3124
mcast_stats_enabled 0 mcast_igmp_version 2 mcast_mld_version 1 nf_call_iptables
0 nf_call_ip6tables 0 nf_call_arptables 0 addrgenmode eui64 numtxqueues 1
numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
+ link/ether 2a:19:e7:b2:98:c6 brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu
68 maxmtu 65535
+ bridge forward_delay 1500 hello_time 200 max_age 2000 ageing_time 30000
stp_state 1 priority 10000 vlan_filtering 0 vlan_protocol 802.1Q bridge_id
2710.2a:19:e7:b2:98:c6 designated_root 2710.2a:19:e7:b2:98:c6 root_port 0
root_path_cost 0 topology_change 0 topology_change_detected 0 hello_timer
0.05 tcn_timer 0.00 topology_change_timer 0.00 gc_timer 0.00
vlan_default_pvid 1 vlan_stats_enabled 0 vlan_stats_per_port 0 group_fwd_mask 0
group_address 01:80:c2:00:00:00 mcast_snooping 1 mcast_router 1
mcast_query_use_ifaddr 0 mcast_querier 0 mcast_hash_elasticity 16
mcast_hash_max 4096 mcast_last_member_count 2 mcast_startup_query_count 2
mcast_last_member_interval 100 mcast_membership_interval 26000
mcast_querier_interval 25500 mcast_query_interval 12500
mcast_query_response_interval 1000 mcast_startup_query_interval 3124
mcast_stats_enabled 0 mcast_igmp_version 2 mcast_mld_version 1 nf_call_iptables
0 nf_call_ip6tables 0 nf_call_arptables 0 addrgenmode eui64 numtxqueues 1
numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
And a nic on that bridge:
root@rssnoc2e0:~# ip netns exec squad0ns ip -d link show gnv1lan
21: gnv1lan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1370 qdisc noqueue master
sqd0lanbr state UNKNOWN mode DEFAULT group default qlen 1000
- link/ether 4a:cf:01:4b:0a:fd brd ff:ff:ff:ff:ff:ff promiscuity 1 minmtu
68 maxmtu 65485
- geneve id 7745 remote 192.168.168.194 ttl auto dstport 6081 noudpcsum
udp6zerocsumrx
- bridge_slave state forwarding priority 32 cost 2048 hairpin off guard off
root_block off fastleave off learning on flood on port_id 0x8001 port_no 0x1
designated_port 32769 designated_cost 0 designated_bridge
2710.2a:19:e7:b2:98:c6 designated_root 2710.2a:19:e7:b2:98:c6 hold_timer
0.70 message_age_timer 0.00 forward_delay_timer 0.00 topology_change_ack
0 config_pending 0 proxy_arp off proxy_arp_wifi off mcast_router 1
mcast_fast_leave off mcast_flood on mcast_to_unicast off neigh_suppress off
group_fwd_mask 0 group_fwd_mask_str 0x0 vlan_tunnel off isolated off
addrgenmode eui64 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs
65535
+ link/ether 4a:cf:01:4b:0a:fd brd ff:ff:ff:ff:ff:ff promiscuity 1 minmtu
68 maxmtu 65485
+ geneve id 7745 remote 192.XXX.XXX.XXX ttl auto dstport 6081 noudpcsum
udp6zerocsumrx
+ bridge_slave state forwarding priority 32 cost 2048 hairpin off guard off
root_block off fastleave off learning on flood on port_id 0x8001 port_no 0x1
designated_port 32769 designated_cost 0 designated_bridge
2710.2a:19:e7:b2:98:c6 designated_root 2710.2a:19:e7:b2:98:c6 hold_timer
0.70 message_age_timer 0.00 forward_delay_timer 0.00 topology_change_ack
0 config_pending 0 proxy_arp off proxy_arp_wifi off mcast_router 1
mcast_fast_leave off mcast_flood on mcast_to_unicast off neigh_suppress off
group_fwd_mask 0 group_fwd_mask_str 0x0 vlan_tunnel off isolated off
addrgenmode eui64 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs
65535
And here, we see the STP multicast address is missing:
root@rssnoc2e0:~# ip netns exec squad0ns ip maddr show gnv1lan
21: gnv1lan
- link 33:33:00:00:00:01
- link 01:00:5e:00:00:01
- inet 224.0.0.1
- inet6 ff02::1
- inet6 ff01::1
- root@rssnoc2e0:~#
+ link 33:33:00:00:00:01
+ link 01:00:5e:00:00:01
+ inet 224.0.0.1
+ inet6 ff02::1
+ inet6 ff01::1
+ root@rssnoc2e0:~#
!! Missing multicast address for STP BPDU reception.
** Summary changed:
- packet storm as nics in STP enabled netns bridges lack BDPU maddr
01:80:c2:00:00:00
+ packet storm as nics in STP enabled netns bridges lack BPDU maddr
01:80:c2:00:00:00
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-signed in Ubuntu.
https://bugs.launchpad.net/bugs/2025311
Title:
packet storm as nics in STP enabled netns bridges lack BPDU maddr
01:80:c2:00:00:00
Status in linux-signed package in Ubuntu:
New
Bug description:
Bridges with STP enabled, only if in the non-default namespace,
connecting the nic as a port to the bridge will not add the STP
multicast address to the port nics, causing them to fail in all
important BPDU topology updates. This leads to packet storms,
effectively locking up all connected systems -- all the problems STP
is designed to prevent.
This bug exists in ubuntu's 5.15 generic Jammy and 6.1 22.04c
kernels. 100% reproducible. Below you'll see two cases that vary
only in that one takes place in a non-default network namespace. The
only material difference is the nic ports in the non-default namespace
lack the STP bridge multicast address.
Notice in the default namespace, for example, we have:
ip -d link show lan0bridge
31: lan0bridge: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UP mode DEFAULT group default qlen 1000
link/ether 52:54:e5:79:c5:7a brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu
68 maxmtu 65535
bridge forward_delay 1500 hello_time 200 max_age 2000 ageing_time 30000
stp_state 1 priority 28 vlan_filtering 0 vlan_protocol 802.1Q bridge_id
001c.52:54:e5:79:c5:7a designated_root 001c.52:54:e5:79:c5:7a root_port 1
root_path_cost 4 topology_change 0 topology_change_detected 0 hello_timer
0.00 tcn_timer 0.00 topology_change_timer 0.00 gc_timer 24.87
vlan_default_pvid 1 vlan_stats_enabled 0 vlan_stats_per_port 0 group_fwd_mask 0
group_address 01:80:c2:00:00:00 mcast_snooping 1 mcast_router 1
mcast_query_use_ifaddr 0 mcast_querier 0 mcast_hash_elasticity 16
mcast_hash_max 4096 mcast_last_member_count 2 mcast_startup_query_count 2
mcast_last_member_interval 100 mcast_membership_interval 26000
mcast_querier_interval 25500 mcast_query_interval 12500
mcast_query_response_interval 1000 mcast_startup_query_interval 3124
mcast_stats_enabled 0 mcast_igmp_version 2 mcast_mld_version 1 nf_call_iptables
0 nf_call_ip6tables 0 nf_call_arptables 0 addrgenmode eui64 numtxqueues 1
numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
And an example port:
ip -d addr show gnv0lan1
32: gnv0lan1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master
lan0bridge state UNKNOWN group default qlen 1000
link/ether 52:54:86:cb:d4:05 brd ff:ff:ff:ff:ff:ff promiscuity 1 minmtu
68 maxmtu 65485
geneve id 7745 remote 192.XXX.XXX.XXx ttl auto dstport 6081 noudpcsum
udp6zerocsumrx
bridge_slave state forwarding priority 32 cost 100 hairpin off guard off
root_block off fastleave off learning on flood on port_id 0x8002 port_no 0x2
designated_port 32770 designated_cost 4 designated_bridge
001c.52:54:e5:79:c5:7a designated_root 0014.52:54:ff:79:8b:4d hold_timer
0.68 message_age_timer 0.00 forward_delay_timer 0.00 topology_change_ack
0 config_pending 0 proxy_arp off proxy_arp_wifi off mcast_router 1
mcast_fast_leave off mcast_flood on mcast_to_unicast off neigh_suppress off
group_fwd_mask 0 group_fwd_mask_str 0x0 vlan_tunnel off isolated off
numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
And the expected
# ip maddr show gnv0lan1
32: gnv0lan1
link 33:33:00:00:00:02 users 2
link 01:00:5e:00:00:01
link 33:33:00:00:00:01
link 01:80:c2:00:00:00 <-- STP multicast address.
...
But in a non-default namespace we have, for example:
root@rssnoc2e0:~# ip netns exec squad0ns ip -d link show sqd0lanbr
20: sqd0lanbr: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1370 qdisc noqueue state
UP mode DEFAULT group default qlen 1000
link/ether 2a:19:e7:b2:98:c6 brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu
68 maxmtu 65535
bridge forward_delay 1500 hello_time 200 max_age 2000 ageing_time 30000
stp_state 1 priority 10000 vlan_filtering 0 vlan_protocol 802.1Q bridge_id
2710.2a:19:e7:b2:98:c6 designated_root 2710.2a:19:e7:b2:98:c6 root_port 0
root_path_cost 0 topology_change 0 topology_change_detected 0 hello_timer
0.05 tcn_timer 0.00 topology_change_timer 0.00 gc_timer 0.00
vlan_default_pvid 1 vlan_stats_enabled 0 vlan_stats_per_port 0 group_fwd_mask 0
group_address 01:80:c2:00:00:00 mcast_snooping 1 mcast_router 1
mcast_query_use_ifaddr 0 mcast_querier 0 mcast_hash_elasticity 16
mcast_hash_max 4096 mcast_last_member_count 2 mcast_startup_query_count 2
mcast_last_member_interval 100 mcast_membership_interval 26000
mcast_querier_interval 25500 mcast_query_interval 12500
mcast_query_response_interval 1000 mcast_startup_query_interval 3124
mcast_stats_enabled 0 mcast_igmp_version 2 mcast_mld_version 1 nf_call_iptables
0 nf_call_ip6tables 0 nf_call_arptables 0 addrgenmode eui64 numtxqueues 1
numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
And a nic on that bridge:
root@rssnoc2e0:~# ip netns exec squad0ns ip -d link show gnv1lan
21: gnv1lan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1370 qdisc noqueue master
sqd0lanbr state UNKNOWN mode DEFAULT group default qlen 1000
link/ether 4a:cf:01:4b:0a:fd brd ff:ff:ff:ff:ff:ff promiscuity 1 minmtu
68 maxmtu 65485
geneve id 7745 remote 192.XXX.XXX.XXX ttl auto dstport 6081 noudpcsum
udp6zerocsumrx
bridge_slave state forwarding priority 32 cost 2048 hairpin off guard off
root_block off fastleave off learning on flood on port_id 0x8001 port_no 0x1
designated_port 32769 designated_cost 0 designated_bridge
2710.2a:19:e7:b2:98:c6 designated_root 2710.2a:19:e7:b2:98:c6 hold_timer
0.70 message_age_timer 0.00 forward_delay_timer 0.00 topology_change_ack
0 config_pending 0 proxy_arp off proxy_arp_wifi off mcast_router 1
mcast_fast_leave off mcast_flood on mcast_to_unicast off neigh_suppress off
group_fwd_mask 0 group_fwd_mask_str 0x0 vlan_tunnel off isolated off
addrgenmode eui64 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs
65535
And here, we see the STP multicast address is missing:
root@rssnoc2e0:~# ip netns exec squad0ns ip maddr show gnv1lan
21: gnv1lan
link 33:33:00:00:00:01
link 01:00:5e:00:00:01
inet 224.0.0.1
inet6 ff02::1
inet6 ff01::1
root@rssnoc2e0:~#
!! Missing multicast address for STP BPDU reception.
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