Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    pfSense VM on Proxmox: PPPoE only works when parent NIC is PCI passthrough — virtual NIC breaks LAN→WAN traffic

    Scheduled Pinned Locked Moved Plus 25.11 Snapshots
    51 Posts 4 Posters 771 Views 6 Watching
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • N Online
      netblues @w0w
      last edited by netblues

      @w0w Brewing... I know in a while

      Nada. Issue remains the same. I installed directly into latest rc 25.11.r.20251126.1732
      and restored config.

      Only ping over pppoe.

      w0wW 1 Reply Last reply Reply Quote 1
      • w0wW Offline
        w0w @netblues
        last edited by w0w

        @netblues

        ok… thats interesting…

        ifconfig vtnet0 -rxcsum -txcsum -rxcsum6 -txcsum6 -vlanhwtag -vlanhwcsum

        Try this on LAN interface. Hope this works for you...

        I just compared ifconfig output for both working and non working VMs and looks like working VM on every interface have options=880008<VLAN_MTU,LINKSTATE,HWSTATS>
        So I applied it to the pppoe parent - still no go... and then I've tried LAN interface and it worked for me.

        N 1 Reply Last reply Reply Quote 0
        • N Online
          netblues @w0w
          last edited by

          @w0w said in pfSense VM on Proxmox: PPPoE only works when parent NIC is PCI passthrough — virtual NIC breaks LAN→WAN traffic:

          ifconfig vtnet0 -rxcsum -txcsum -rxcsum6 -txcsum6 -vlanhwtag -vlanhwcsum

          Tried that.. Still , no dice. :(

          w0wW 1 Reply Last reply Reply Quote 0
          • w0wW Offline
            w0w @netblues
            last edited by

            @netblues
            Please show your ifconfig output for LAN and pppoe parent interface.

            N 1 Reply Last reply Reply Quote 0
            • N Online
              netblues @w0w
              last edited by netblues

              @w0w I have now created a fresh default install
              Directly install 25.11rc from netgate installer , configured everything by the gui just for a single lan, and a single pppoe connection.

              Automatic outbound nat etc. No changes anywhere

              ping works, everything else on physical lan fails (miserably)
              pfsense (and anything on virtual) can install packages, and has full Internet

              have tried disabling checksums too. No dice

              ifconfig vtnet1
vtnet1: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
   description: WAN
   options=8800a8<VLAN_MTU,JUMBO_MTU,VLAN_HWCSUM,LINKSTATE,HWSTATS>
   ether d4:5d:64:08:66:46
   inet6 fe80::d65d:64ff:fe08:6646%vtnet1 prefixlen 64 scopeid 0x2
   media: Ethernet autoselect (10Gbase-T <full-duplex>)
   status: active
   nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>

pppoe0: flags=10088d1<UP,POINTOPOINT,RUNNING,NOARP,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1492
   description: Ftth1G
   options=0
   inet 100.79.101.245 --> 10.106.108.100 netmask 0xffffffff
   inet6 fe80::d65d:64ff:fe08:6646%pppoe0 prefixlen 64 scopeid 0x7
   nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>

              As a side note, when restoring configuration to a fresh install 25.11rc, all packages got reinstalled, however the widget says no packages.
              I have tried removing it and adding again. Nada.
              Tried adding a new package (from gui), package got installed the widget insists. No packages installed.

              Steps to reproduce. Install fresh pfplus 25.11rc, restore config that has package widget and some packages, wait for the packages reinstallation, and voila !

              w0wW 1 Reply Last reply Reply Quote 0
              • w0wW Offline
                w0w @netblues
                last edited by w0w

                @netblues
                You forgot to show your ifconfig LAN output.

                loader.conf.local (you need to reboot after making changes)

                hw.vtnet.altq_disable=1
hw.vtnet.tso_disable=1
hw.vtnet.csum_disable=1

                LAN

                ix0: flags=1008943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
	options=4813828<VLAN_MTU,JUMBO_MTU,WOL_UCAST,WOL_MCAST,WOL_MAGIC,VLAN_HWFILTER,HWSTATS,MEXTPG>
	ether a0:3------25
	inet6 fe80::aab8:e0ff:fe02:655a%ix0 prefixlen 64 scopeid 0x1
	media: Ethernet autoselect (10Gbase-T <full-duplex>)
	status: active
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>

                WAN parent

                vtnet0: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
	options=880008<VLAN_MTU,LINKSTATE,HWSTATS>
	ether a-----:24
	inet6 fe80::aab8:e0ff:fe02:655a%vtnet0 prefixlen 64 scopeid 0x6
	media: Ethernet autoselect (10Gbase-T <full-duplex>)
	status: active
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>

                Shell Output - sysctl hw.vtnet.

                hw.vtnet.altq_disable: 1
hw.vtnet.lro_mbufq_depth: 0
hw.vtnet.lro_entry_count: 128
hw.vtnet.rx_process_limit: 1024
hw.vtnet.tso_maxlen: 65535
hw.vtnet.mq_max_pairs: 32
hw.vtnet.mq_disable: 0
hw.vtnet.lro_disable: 1
hw.vtnet.tso_disable: 1
hw.vtnet.fixup_needs_csum: 0
hw.vtnet.csum_disable: 1

                Side note — if you have vlans on LAN you should not use -vlanhwtag posted previously, this will break vlans

                N 1 Reply Last reply Reply Quote 0
                • N Online
                  netblues @w0w
                  last edited by

                  @w0w
                  All vlan configuration is handled at the hypervisor level.
                  pf sees only virtual interfaces.

                  Here is the output

                  sysctl hw.vtnet
hw.vtnet.altq_disable: 1
hw.vtnet.lro_mbufq_depth: 0
hw.vtnet.lro_entry_count: 128
hw.vtnet.rx_process_limit: 1024
hw.vtnet.tso_maxlen: 65535
hw.vtnet.mq_max_pairs: 32
hw.vtnet.mq_disable: 0
hw.vtnet.lro_disable: 1
hw.vtnet.tso_disable: 1
hw.vtnet.fixup_needs_csum: 0
hw.vtnet.csum_disable: 1

                  ifconfig vtnet0
vtnet0: flags=1008943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
   options=880028<VLAN_MTU,JUMBO_MTU,LINKSTATE,HWSTATS>
   ether 52:54:00:05:01:fb
   inet 192.168.31.3 netmask 0xffffff00 broadcast 192.168.31.255
   inet6 fe80::5054:ff:fe05:1fb%vtnet0 prefixlen 64 scopeid 0x1
   media: Ethernet autoselect (10Gbase-T <full-duplex>)
   status: active
   nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
                  w0wW 2 Replies Last reply Reply Quote 0
                  • w0wW Offline
                    w0w @netblues
                    last edited by

                    @netblues
                    I kinda screwed up… I forgot to mention that this ix0 is part of a LAGG interface, and the LAN itself is using that LAGG. This shouldn’t really affect anything, but I’ll check if that’s the issue. Also, I don’t remember changing any settings for this NIC on the host, I think I left it as is.

                    1 Reply Last reply Reply Quote 0
                    • w0wW Offline
                      w0w
                      last edited by

                      Configured LAN to use ix0 directly — nothing changed.

                      1 Reply Last reply Reply Quote 0
                      • w0wW Offline
                        w0w @netblues
                        last edited by w0w

                        @netblues said in pfSense VM on Proxmox: PPPoE only works when parent NIC is PCI passthrough — virtual NIC breaks LAN→WAN traffic:

                        JUMBO_MTU

                        Hmm… I don't see any jumbo settings on my vtnet interfaces, did you change something? VM setiings? Nonstandard MTU?

                        Now I have configured it directly for both pppoe and LAN

                        vtnet0: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
	options=880008<VLAN_MTU,LINKSTATE,HWSTATS>
	ether a-
	inet6 fe80::aab8:e0ff:fe02:655a%vtnet0 prefixlen 64 scopeid 0x5
	media: Ethernet autoselect (10Gbase-T <full-duplex>)
	status: active
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
vtnet1: flags=1008943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
	description: LAN
	options=880008<VLAN_MTU,LINKSTATE,HWSTATS>
	ether a-
	inet 10.0.67.2 netmask 0xffffff00 broadcast 10.0.67.255
	inet 10.0.67.5 netmask 0xffffff00 broadcast 10.0.67.255 vhid 5
	inet 10.0.70.5 netmask 0xffffff00 broadcast 10.0.70.255 vhid 10
	inet 10.0.70.11 netmask 0xffffff00 broadcast 10.0.70.255
	inet6 fe80::a236:9fff:fef8:f225%vtnet1 prefixlen 64 scopeid 0x6
	inet6 fd00:1234:abcd:1::2 prefixlen 64
	inet6 fd00:1234:abcd:1::5 prefixlen 64 vhid 12
	carp: MASTER vhid 5 advbase 5 advskew 100
	      peer 224.0.0.18 peer6 ff02::12
	carp: MASTER vhid 10 advbase 5 advskew 100
	      peer 224.0.0.18 peer6 ff02::12
	carp: MASTER vhid 12 advbase 5 advskew 100
	      peer 224.0.0.18 peer6 ff02::12
	media: Ethernet autoselect (10Gbase-T <full-duplex>)
	status: active
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>

                        Ok, I've changed MTU to 9000 in proxmox for the LAN card/bridge/vtnet

                        vtnet1: flags=1008943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
	description: LAN
	options=880028<VLAN_MTU,JUMBO_MTU,LINKSTATE,HWSTATS>

                        Still working for me… no problem.

                        Proxmox settings for WAN parent

                        :~# ethtool -k enp6s0f0
Features for enp6s0f0:
rx-checksumming: on
tx-checksumming: on
        tx-checksum-ipv4: off [fixed]
        tx-checksum-ip-generic: on
        tx-checksum-ipv6: off [fixed]
        tx-checksum-fcoe-crc: on [fixed]
        tx-checksum-sctp: on
scatter-gather: on
        tx-scatter-gather: on
        tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: on
        tx-tcp-segmentation: on
        tx-tcp-ecn-segmentation: off [fixed]
        tx-tcp-mangleid-segmentation: off
        tx-tcp6-segmentation: on
        tx-tcp-accecn-segmentation: off [fixed]
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off
rx-vlan-offload: on
tx-vlan-offload: on
ntuple-filters: off
receive-hashing: on
highdma: on [fixed]
rx-vlan-filter: on
vlan-challenged: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: on [fixed]
tx-gre-segmentation: on
tx-gre-csum-segmentation: on
tx-ipxip4-segmentation: on
tx-ipxip6-segmentation: on
tx-udp_tnl-segmentation: on
tx-udp_tnl-csum-segmentation: on
tx-gso-partial: on
tx-tunnel-remcsum-segmentation: off [fixed]
tx-sctp-segmentation: off [fixed]
tx-esp-segmentation: on
tx-udp-segmentation: on
tx-gso-list: off [fixed]
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off [fixed]
rx-all: off
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
l2-fwd-offload: off
hw-tc-offload: off
esp-hw-offload: on
esp-tx-csum-hw-offload: on
rx-udp_tunnel-port-offload: on
tls-hw-tx-offload: off [fixed]
tls-hw-rx-offload: off [fixed]
rx-gro-hw: off [fixed]
tls-hw-record: off [fixed]
rx-gro-list: off
macsec-hw-offload: off [fixed]
rx-udp-gro-forwarding: off
hsr-tag-ins-offload: off [fixed]
hsr-tag-rm-offload: off [fixed]
hsr-fwd-offload: off [fixed]
hsr-dup-offload: off [fixed]

                        LAN

                         ethtool -k enp6s0f1
Features for enp6s0f1:
rx-checksumming: on
tx-checksumming: on
        tx-checksum-ipv4: off [fixed]
        tx-checksum-ip-generic: on
        tx-checksum-ipv6: off [fixed]
        tx-checksum-fcoe-crc: on [fixed]
        tx-checksum-sctp: on
scatter-gather: on
        tx-scatter-gather: on
        tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: on
        tx-tcp-segmentation: on
        tx-tcp-ecn-segmentation: off [fixed]
        tx-tcp-mangleid-segmentation: off
        tx-tcp6-segmentation: on
        tx-tcp-accecn-segmentation: off [fixed]
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off
rx-vlan-offload: on
tx-vlan-offload: on
ntuple-filters: off
receive-hashing: on
highdma: on [fixed]
rx-vlan-filter: on
vlan-challenged: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: on [fixed]
tx-gre-segmentation: on
tx-gre-csum-segmentation: on
tx-ipxip4-segmentation: on
tx-ipxip6-segmentation: on
tx-udp_tnl-segmentation: on
tx-udp_tnl-csum-segmentation: on
tx-gso-partial: on
tx-tunnel-remcsum-segmentation: off [fixed]
tx-sctp-segmentation: off [fixed]
tx-esp-segmentation: on
tx-udp-segmentation: on
tx-gso-list: off [fixed]
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off [fixed]
rx-all: off
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
l2-fwd-offload: off
hw-tc-offload: off
esp-hw-offload: on
esp-tx-csum-hw-offload: on
rx-udp_tunnel-port-offload: on
tls-hw-tx-offload: off [fixed]
tls-hw-rx-offload: off [fixed]
rx-gro-hw: off [fixed]
tls-hw-record: off [fixed]
rx-gro-list: off
macsec-hw-offload: off [fixed]
rx-udp-gro-forwarding: off
hsr-tag-ins-offload: off [fixed]
hsr-tag-rm-offload: off [fixed]
hsr-fwd-offload: off [fixed]
hsr-dup-offload: off [fixed]
                        N 1 Reply Last reply Reply Quote 0
                        • N Online
                          netblues @w0w
                          last edited by

                          @w0w I see minor differences on the physical kvm interface, but I haven't done anything special, its at defaults.

                          The mtu has been adjusted to 1508, but that can't be the issue. In any case, the brigded interfaces all use 1500 as mtu.

                          As is, the same bridges are used at the same time by pfpls @25.07 pfplus @25.11rc and pfCE 2.8.1 with multiple pppoe connections over the same parent vlam.

                          Only new rc fails to work as described above.

                          ethtool -k enp1s0.31
Features for enp1s0.31:
rx-checksumming: off [fixed]
tx-checksumming: on
   tx-checksum-ipv4: off [fixed]
   tx-checksum-ip-generic: on
   tx-checksum-ipv6: off [fixed]
   tx-checksum-fcoe-crc: off [requested on]
   tx-checksum-sctp: off [requested on]
scatter-gather: on
   tx-scatter-gather: on
   tx-scatter-gather-fraglist: off [requested on]
tcp-segmentation-offload: on
   tx-tcp-segmentation: on
   tx-tcp-ecn-segmentation: on
   tx-tcp-mangleid-segmentation: on
   tx-tcp6-segmentation: on
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off [fixed]
rx-vlan-offload: off [fixed]
tx-vlan-offload: off [fixed]
ntuple-filters: off [fixed]
receive-hashing: off [fixed]
highdma: on
rx-vlan-filter: off [fixed]
vlan-challenged: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [requested on]
tx-gre-segmentation: off [requested on]
tx-gre-csum-segmentation: off [requested on]
tx-ipxip4-segmentation: off [requested on]
tx-ipxip6-segmentation: off [requested on]
tx-udp_tnl-segmentation: off [requested on]
tx-udp_tnl-csum-segmentation: off [requested on]
tx-gso-partial: off [fixed]
tx-tunnel-remcsum-segmentation: off [fixed]
tx-sctp-segmentation: on
tx-esp-segmentation: off [fixed]
tx-udp-segmentation: on
tx-gso-list: on
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off [fixed]
rx-all: off [fixed]
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
l2-fwd-offload: off [fixed]
hw-tc-offload: off [fixed]
esp-hw-offload: off [fixed]
esp-tx-csum-hw-offload: off [fixed]
rx-udp_tunnel-port-offload: off [fixed]
tls-hw-tx-offload: off [fixed]
tls-hw-rx-offload: off [fixed]
rx-gro-hw: off [fixed]
tls-hw-record: off [fixed]
rx-gro-list: off
macsec-hw-offload: off [fixed]
rx-udp-gro-forwarding: off
hsr-tag-ins-offload: off [fixed]
hsr-tag-rm-offload: off [fixed]
hsr-fwd-offload: off [fixed]
hsr-dup-offload: off [fixed]

                          ethtool -k enp1s0.835
Features for enp1s0.835:
rx-checksumming: off [fixed]
tx-checksumming: on
	tx-checksum-ipv4: off [fixed]
	tx-checksum-ip-generic: on
	tx-checksum-ipv6: off [fixed]
	tx-checksum-fcoe-crc: off [requested on]
	tx-checksum-sctp: off [requested on]
scatter-gather: on
	tx-scatter-gather: on
	tx-scatter-gather-fraglist: off [requested on]
tcp-segmentation-offload: on
	tx-tcp-segmentation: on
	tx-tcp-ecn-segmentation: on
	tx-tcp-mangleid-segmentation: on
	tx-tcp6-segmentation: on
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off [fixed]
rx-vlan-offload: off [fixed]
tx-vlan-offload: off [fixed]
ntuple-filters: off [fixed]
receive-hashing: off [fixed]
highdma: on
rx-vlan-filter: off [fixed]
vlan-challenged: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [requested on]
tx-gre-segmentation: off [requested on]
tx-gre-csum-segmentation: off [requested on]
tx-ipxip4-segmentation: off [requested on]
tx-ipxip6-segmentation: off [requested on]
tx-udp_tnl-segmentation: off [requested on]
tx-udp_tnl-csum-segmentation: off [requested on]
tx-gso-partial: off [fixed]
tx-tunnel-remcsum-segmentation: off [fixed]
tx-sctp-segmentation: on
tx-esp-segmentation: off [fixed]
tx-udp-segmentation: on
tx-gso-list: on
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off [fixed]
rx-all: off [fixed]
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
l2-fwd-offload: off [fixed]
hw-tc-offload: off [fixed]
esp-hw-offload: off [fixed]
esp-tx-csum-hw-offload: off [fixed]
rx-udp_tunnel-port-offload: off [fixed]
tls-hw-tx-offload: off [fixed]
tls-hw-rx-offload: off [fixed]
rx-gro-hw: off [fixed]
tls-hw-record: off [fixed]
rx-gro-list: off
macsec-hw-offload: off [fixed]
rx-udp-gro-forwarding: off
hsr-tag-ins-offload: off [fixed]
hsr-tag-rm-offload: off [fixed]
hsr-fwd-offload: off [fixed]
hsr-dup-offload: off [fixed]

                          ethtool -k enp1s0
Features for enp1s0:
rx-checksumming: on
tx-checksumming: on
	tx-checksum-ipv4: on
	tx-checksum-ip-generic: off [fixed]
	tx-checksum-ipv6: on
	tx-checksum-fcoe-crc: off [fixed]
	tx-checksum-sctp: off [fixed]
scatter-gather: on
	tx-scatter-gather: on
	tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: on
	tx-tcp-segmentation: on
	tx-tcp-ecn-segmentation: off [fixed]
	tx-tcp-mangleid-segmentation: off
	tx-tcp6-segmentation: on
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off [fixed]
rx-vlan-offload: on
tx-vlan-offload: on
ntuple-filters: off [fixed]
receive-hashing: on
highdma: on [fixed]
rx-vlan-filter: on [fixed]
vlan-challenged: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [fixed]
tx-gre-segmentation: off [fixed]
tx-gre-csum-segmentation: off [fixed]
tx-ipxip4-segmentation: off [fixed]
tx-ipxip6-segmentation: off [fixed]
tx-udp_tnl-segmentation: off [fixed]
tx-udp_tnl-csum-segmentation: off [fixed]
tx-gso-partial: off [fixed]
tx-tunnel-remcsum-segmentation: off [fixed]
tx-sctp-segmentation: off [fixed]
tx-esp-segmentation: off [fixed]
tx-udp-segmentation: off [fixed]
tx-gso-list: off [fixed]
tx-nocache-copy: off
loopback: off
rx-fcs: off
rx-all: off
tx-vlan-stag-hw-insert: off
rx-vlan-stag-hw-parse: on
rx-vlan-stag-filter: on [fixed]
l2-fwd-offload: off [fixed]
hw-tc-offload: off [fixed]
esp-hw-offload: off [fixed]
esp-tx-csum-hw-offload: off [fixed]
rx-udp_tunnel-port-offload: off [fixed]
tls-hw-tx-offload: off [fixed]
tls-hw-rx-offload: off [fixed]
rx-gro-hw: off [fixed]
tls-hw-record: off [fixed]
rx-gro-list: off
macsec-hw-offload: off [fixed]
rx-udp-gro-forwarding: off
hsr-tag-ins-offload: off [fixed]
hsr-tag-rm-offload: off [fixed]
hsr-fwd-offload: off [fixed]
hsr-dup-offload: off [fixed]
                          1 Reply Last reply Reply Quote 0
                          • stephenw10S Offline
                            stephenw10 Netgate Administrator
                            last edited by

                            Can you ping across it with large packets?

                            When ICMP passes and nothing else does it's usually either an MTU issue or some sort of asymmetric routing problem. But neither should have changed in 25.11.

                            The packages widget issue is known: https://forum.netgate.com/topic/199375/zero-packages-install/

                            N w0wW 2 Replies Last reply Reply Quote 0
                            • N Online
                              netblues @stephenw10
                              last edited by netblues

                              @stephenw10 Obviously yes

                              ping 8.8.4.4 -l 1472 -f

                              Pinging 8.8.4.4 with 1472 bytes of data:
                              Reply from 8.8.4.4: bytes=1472 time=14ms TTL=112
                              Reply from 8.8.4.4: bytes=1472 time=14ms TTL=112
                              Reply from 8.8.4.4: bytes=1472 time=14ms TTL=112
                              Reply from 8.8.4.4: bytes=1472 time=14ms TTL=112

                              Ping statistics for 8.8.4.4:
                              Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
                              Approximate round trip times in milli-seconds:
                              Minimum = 14ms, Maximum = 14ms, Average = 14ms

                              And same config couldn't cause mtu issues imho too.

                              And this is a plain vanila config, only one wan one lan interface, no policy routing, nothing fancy

                              w0wW 1 Reply Last reply Reply Quote 0
                              • stephenw10S Offline
                                stephenw10 Netgate Administrator
                                last edited by

                                Yup I agree it shouldn't. But PPPoE has always had MTU/MSS requirements and if_pppoe specifically had an MSS issue previously.

                                w0wW 1 Reply Last reply Reply Quote 0
                                • w0wW Offline
                                  w0w @stephenw10
                                  last edited by

                                  @stephenw10 said in pfSense VM on Proxmox: PPPoE only works when parent NIC is PCI passthrough — virtual NIC breaks LAN→WAN traffic:

                                  some sort of asymmetric routing problem.

                                  I think these might be some of the commits on the FreeBSD side from the list I posted above. I don’t know whether Netgate uses the vanilla vtnet driver from FreeBSD 16 or their own custom patches. From what I can see, those checksum-related patches could potentially trigger this issue, but ifconfig vtnet0 -rxcsum -txcsum -tso -lro should disable this functionality, so I have no idea what is actually happening.

                                  1 Reply Last reply Reply Quote 0
                                  • w0wW Offline
                                    w0w @stephenw10
                                    last edited by w0w

                                    @stephenw10 said in pfSense VM on Proxmox: PPPoE only works when parent NIC is PCI passthrough — virtual NIC breaks LAN→WAN traffic:

                                    and if_pppoe

                                    BTW, mpd have the same issue. More precisely, the bug is not related to if_pppoe or mpd5, since it appears the same way with both.

                                    1 Reply Last reply Reply Quote 0
                                    • w0wW Offline
                                      w0w @netblues
                                      last edited by

                                      @netblues

                                      Do you have the same settings?

                                      2f15fa41-dcea-4151-8809-7f5bb87f2d90-image.png code_text

                                      1 Reply Last reply Reply Quote 0
                                      • First post
                                        Last post
                                      Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.