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
    53 Posts 4 Posters 790 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.
    • w0wW Away
      w0w
      last edited by

      Configured LAN to use ix0 directly — nothing changed.

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

                      @netblues

                      Do you have the same settings?

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

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

                        @w0w Sure. As I said, default installation with minimal setup, just to make the lan to nat over pppoe to the Internets.

                        2da5b0b5-043d-4462-b5dc-c2367f2fbe95-image.png

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

                          @netblues
                          Just for reference, what hardware is used actually to run the hypervisor and version of the hypervisor?

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