VLAN Tagging Issues ONLY when gateway is set on Linux Bridge

jsalas424

Member
Jul 5, 2020
124
2
18
32
PVE 7.2-3

Per my title, my VLAN tagged VM's can only pull a DHCP address from the router when the gateway the bridge isn't set. Since this is a shared bridge, the hypervisor can't reach the internet for updates etc. Any help to fix this is greatly appreciated!

My home network is running a virtualized pfsense instance on this same hypervisor. When the gateway is set, VM's can't ping the VLAN gateway nor the untagged (192.168.1.1) gateway. If I have two VM's tagged with the same VLAN, they also cannot ping each other when the gateway is set.

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Last edited:

jsalas424

Member
Jul 5, 2020
124
2
18
32
Networking details from the hypervisor when gateway is NOT set and VMs are successfully being tagged and have network access

Code:
root@TracheNodeB:~# ip -details a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 promiscuity 0 minmtu 0 maxmtu 0 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether f8:b1:56:d2:cd:f0 brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68 maxmtu 9000 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
    altname enp0s25
    inet 10.0.0.4/24 scope global eno1
       valid_lft forever preferred_lft forever
    inet6 fe80::fab1:56ff:fed2:cdf0/64 scope link
       valid_lft forever preferred_lft forever
3: enp3s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr1 state UP group default qlen 1000
    link/ether 68:05:ca:01:41:b6 brd ff:ff:ff:ff:ff:ff promiscuity 1 minmtu 68 maxmtu 9212
    bridge_slave state forwarding priority 32 cost 100 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 8000.68:5:ca:1:41:b6 designated_root 8000.68:5:ca:1:41:b6 hold_timer    0.00 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
4: enp3s0f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP group default qlen 1000
    link/ether 68:05:ca:01:41:b7 brd ff:ff:ff:ff:ff:ff promiscuity 1 minmtu 68 maxmtu 9212
    bridge_slave state forwarding priority 32 cost 100 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 8000.68:5:ca:1:41:b7 designated_root 8000.68:5:ca:1:41:b7 hold_timer    0.00 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
5: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 68:05:ca:01:41:b7 brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68 maxmtu 65535
    bridge forward_delay 0 hello_time 200 max_age 2000 ageing_time 30000 stp_state 0 priority 32768 vlan_filtering 1 vlan_protocol 802.1Q bridge_id 8000.68:5:ca:1:41:b7 designated_root 8000.68:5:ca:1:41:b7 root_port 0 root_path_cost 0 topology_change 0 topology_change_detected 0 hello_timer    0.00 tcn_timer    0.00 topology_change_timer    0.00 gc_timer  182.46 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 512 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 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
    inet 192.168.1.25/24 scope global vmbr0
       valid_lft forever preferred_lft forever
    inet6 fe80::6a05:caff:fe01:41b7/64 scope link
       valid_lft forever preferred_lft forever
6: vmbr1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 68:05:ca:01:41:b6 brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68 maxmtu 65535
    bridge forward_delay 0 hello_time 200 max_age 2000 ageing_time 30000 stp_state 0 priority 32768 vlan_filtering 0 vlan_protocol 802.1Q bridge_id 8000.68:5:ca:1:41:b6 designated_root 8000.68:5:ca:1:41:b6 root_port 0 root_path_cost 0 topology_change 0 topology_change_detected 0 hello_timer    0.00 tcn_timer    0.00 topology_change_timer    0.00 gc_timer  201.38 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 512 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 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
    inet6 fe80::6a05:caff:fe01:41b6/64 scope link
       valid_lft forever preferred_lft forever
7: tap300i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UNKNOWN group default qlen 1000
    link/ether ae:b6:eb:ce:93:ee brd ff:ff:ff:ff:ff:ff promiscuity 2 minmtu 68 maxmtu 65521
    tun type tap pi off vnet_hdr on persist off
    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 0 designated_bridge 8000.68:5:ca:1:41:b7 designated_root 8000.68:5:ca:1:41:b7 hold_timer    0.00 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
8: tap300i1: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master fwbr300i1 state UNKNOWN group default qlen 1000
    link/ether 26:ba:25:ee:be:c1 brd ff:ff:ff:ff:ff:ff promiscuity 2 minmtu 68 maxmtu 65521
    tun type tap pi off vnet_hdr on persist off
    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 0 designated_bridge 8000.ca:7a:a2:41:9c:ec designated_root 8000.ca:7a:a2:41:9c:ec hold_timer    0.00 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
9: fwbr300i1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether ca:7a:a2:41:9c:ec brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68 maxmtu 65535
    bridge forward_delay 0 hello_time 200 max_age 2000 ageing_time 30000 stp_state 0 priority 32768 vlan_filtering 0 vlan_protocol 802.1Q bridge_id 8000.ca:7a:a2:41:9c:ec designated_root 8000.ca:7a:a2:41:9c:ec root_port 0 root_path_cost 0 topology_change 0 topology_change_detected 0 hello_timer    0.00 tcn_timer    0.00 topology_change_timer    0.00 gc_timer  119.51 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 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
10: fwpr300p1@fwln300i1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr1 state UP group default qlen 1000
    link/ether d6:e9:a8:95:40:2e brd ff:ff:ff:ff:ff:ff promiscuity 1 minmtu 68 maxmtu 65535
    veth
    bridge_slave state forwarding priority 32 cost 2 hairpin off guard off root_block off fastleave off learning on flood on port_id 0x8002 port_no 0x2 designated_port 32770 designated_cost 0 designated_bridge 8000.68:5:ca:1:41:b6 designated_root 8000.68:5:ca:1:41:b6 hold_timer    0.00 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 8 numrxqueues 8 gso_max_size 65536 gso_max_segs 65535
11: fwln300i1@fwpr300p1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr300i1 state UP group default qlen 1000
    link/ether 3e:26:7b:df:0e:ed brd ff:ff:ff:ff:ff:ff promiscuity 1 minmtu 68 maxmtu 65535
    veth
    bridge_slave state forwarding priority 32 cost 2 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 8000.ca:7a:a2:41:9c:ec designated_root 8000.ca:7a:a2:41:9c:ec hold_timer    0.00 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 8 numrxqueues 8 gso_max_size 65536 gso_max_segs 65535
12: tap420i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UNKNOWN group default qlen 1000
    link/ether 06:e4:23:76:4e:03 brd ff:ff:ff:ff:ff:ff promiscuity 2 minmtu 68 maxmtu 65521
    tun type tap pi off vnet_hdr on persist off
    bridge_slave state forwarding priority 32 cost 100 hairpin off guard off root_block off fastleave off learning on flood on port_id 0x8003 port_no 0x3 designated_port 32771 designated_cost 0 designated_bridge 8000.68:5:ca:1:41:b7 designated_root 8000.68:5:ca:1:41:b7 hold_timer    0.00 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
14: veth101i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr101i0 state UP group default qlen 1000
    link/ether fe:1e:e0:c2:84:68 brd ff:ff:ff:ff:ff:ff link-netnsid 0 promiscuity 1 minmtu 68 maxmtu 65535
    veth
    bridge_slave state forwarding priority 32 cost 2 hairpin off guard off root_block off fastleave off learning on flood on port_id 0x8002 port_no 0x2 designated_port 32770 designated_cost 0 designated_bridge 8000.fa:8e:60:5:32:22 designated_root 8000.fa:8e:60:5:32:22 hold_timer    0.00 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 8 numrxqueues 8 gso_max_size 65536 gso_max_segs 65535
15: fwbr101i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether fa:8e:60:05:32:22 brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68 maxmtu 65535
    bridge forward_delay 0 hello_time 200 max_age 2000 ageing_time 30000 stp_state 0 priority 32768 vlan_filtering 0 vlan_protocol 802.1Q bridge_id 8000.fa:8e:60:5:32:22 designated_root 8000.fa:8e:60:5:32:22 root_port 0 root_path_cost 0 topology_change 0 topology_change_detected 0 hello_timer    0.00 tcn_timer    0.00 topology_change_timer    0.00 gc_timer  111.50 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 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
16: fwpr101p0@fwln101i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether ae:ad:9b:a7:46:09 brd ff:ff:ff:ff:ff:ff promiscuity 1 minmtu 68 maxmtu 65535
    veth
    bridge_slave state forwarding priority 32 cost 2 hairpin off guard off root_block off fastleave off learning on flood on port_id 0x8005 port_no 0x5 designated_port 32773 designated_cost 0 designated_bridge 8000.68:5:ca:1:41:b7 designated_root 8000.68:5:ca:1:41:b7 hold_timer    0.00 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 8 numrxqueues 8 gso_max_size 65536 gso_max_segs 65535
17: fwln101i0@fwpr101p0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr101i0 state UP group default qlen 1000
    link/ether 46:fe:36:da:76:d3 brd ff:ff:ff:ff:ff:ff promiscuity 1 minmtu 68 maxmtu 65535
    veth
    bridge_slave state forwarding priority 32 cost 2 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 8000.fa:8e:60:5:32:22 designated_root 8000.fa:8e:60:5:32:22 hold_timer    0.00 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 8 numrxqueues 8 gso_max_size 65536 gso_max_segs 65535
18: tap69420i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UNKNOWN group default qlen 1000
    link/ether 3a:f2:47:91:8d:ea brd ff:ff:ff:ff:ff:ff promiscuity 2 minmtu 68 maxmtu 65521
    tun type tap pi off vnet_hdr on persist off
    bridge_slave state forwarding priority 32 cost 100 hairpin off guard off root_block off fastleave off learning on flood on port_id 0x8004 port_no 0x4 designated_port 32772 designated_cost 0 designated_bridge 8000.68:5:ca:1:41:b7 designated_root 8000.68:5:ca:1:41:b7 hold_timer    0.00 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
 
Last edited:

jsalas424

Member
Jul 5, 2020
124
2
18
32
Networking details inside a working VLAN tagged VM on the same hypervisor:

Code:
jon@zonemindergpu:~$  ip -details a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 promiscuity 0 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: enp6s18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 26:77:a8:6e:5e:4f brd ff:ff:ff:ff:ff:ff promiscuity 0 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
    inet 192.168.3.10/24 brd 192.168.3.255 scope global dynamic enp6s18
       valid_lft 4775sec preferred_lft 4775sec
    inet6 fe80::2477:a8ff:fe6e:5e4f/64 scope link
       valid_lft forever preferred_lft forever
 

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