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    CARP issues

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    • S
      steve40
      last edited by

      Update.

      I swapped out the TP-link with a Cisco switch and the same issue persists. The primary unit is the only unit online and ping -t to 8.8.8.8 from a workstation on the local lan works for about 450 seconds then begins to timeout. If I go into carp settings page and just click "save" and "accept changes" (even without making any changes} it begins to work for another 450 seconds. The switch is a plain vanilla install and the outside interface is running advanced outbound nat which is mapping to the virtual ip

      As an added test, I simultaneously setup a continuous ping to the outside interface VIP address from the same host inside and that ping begins to die at the exact same time as the one to 8.8.8.8. It would stand to reason in my mind that if this were a upstream switch related issue. I also have a laptop sitting on the outside subnet where this internet facing VIP resides and the laptop can ping the VIP and it sees the VIP autogenerated MAC address in it's own arp table.

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      • DerelictD
        Derelict LAYER 8 Netgate
        last edited by

        You'll have to be pore specific, post some screen shots, packet captures, etc.

        It does not stand to reason that you are seeing a CARP problem that nobody else is.

        Proper functioning of CARP does not require an ARP entry on the local firewall for the CARP VIP.

        xn1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=3<RXCSUM,TXCSUM>
	ether f2:92:fa:6a:32:79
	hwaddr f2:92:fa:6a:32:79
	inet6 fe80::f092:faff:fe6a:3279%xn1 prefixlen 64 scopeid 0x6
	inet 172.25.228.18 netmask 0xffffff00 broadcast 172.25.228.255
	inet 172.25.228.140 netmask 0xffffff00 broadcast 172.25.228.255 vhid 228
	inet 172.25.228.65 netmask 0xffffff00 broadcast 172.25.228.255 vhid 228
	inet 172.25.228.66 netmask 0xffffff00 broadcast 172.25.228.255 vhid 228
	inet 172.25.228.67 netmask 0xffffff00 broadcast 172.25.228.255 vhid 228
	inet 172.25.228.17 netmask 0xffffff00 broadcast 172.25.228.255 vhid 228
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	media: Ethernet manual
	status: active
	carp: MASTER vhid 228 advbase 1 advskew 0

        PING 172.25.228.1 (172.25.228.1) from 172.25.228.17: 56 data bytes
64 bytes from 172.25.228.1: icmp_seq=0 ttl=64 time=1.280 ms
64 bytes from 172.25.228.1: icmp_seq=1 ttl=64 time=0.268 ms
64 bytes from 172.25.228.1: icmp_seq=2 ttl=64 time=0.244 ms

--- 172.25.228.1 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.244/0.597/1.280/0.483 ms

        Shell Output - arp -n 172.25.228.17
172.25.228.17 (172.25.228.17) -- no entry

        Chattanooga, Tennessee, USA
        A comprehensive network diagram is worth 10,000 words and 15 conference calls.
        DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
        Do Not Chat For Help! NO_WAN_EGRESS(TM)

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        • S
          steve40
          last edited by

          Hello,

          thanks again for responding. I'm uploading a tcp dump taken off the outside interface
          there are two packet captures. the first was taken while it's working and the second when it stops.
          I've also included my config.xml, loader.conf outpout of sysctl and ifconfig and pciconf files and attached the log file generated around the same time

          thanks 0_1532554827846_debug.tar 0_1532554834563_logs.txt

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          • S
            steve40
            last edited by

            Oh, and sorry for not specifying. The packet captures and other files are in the debug.tar file and the log is in the other file

            thanks again

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            • DerelictD
              Derelict LAYER 8 Netgate
              last edited by

              Please download and post actual pcaps so wireshark can do the heavy lifting.

              Thanks.

              Also please describe exactly what is "working" and what isn't. Like what traffic to actually look at.

              Chattanooga, Tennessee, USA
              A comprehensive network diagram is worth 10,000 words and 15 conference calls.
              DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
              Do Not Chat For Help! NO_WAN_EGRESS(TM)

              1 Reply Last reply Reply Quote 0
              • S
                steve40
                last edited by

                I'm posting a capture of the pfsense capture as it's working. meaning, this is the gateway I am literally connecting to this forum right now through .. I've got a continuous ping running to 8.8.8.8 as well. I about 5 minutes I'll be posting the capture taken when it stops working [0_1532557784353_while-working.cap](Uploading 100%)

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                • S
                  steve40
                  last edited by

                  0_1532557838891_while-working.pcap

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                  • DerelictD
                    Derelict LAYER 8 Netgate
                    last edited by

                    You might want to set the pcaps to more than 100 frames.

                    That showed one request and one reply and no CARP.

                    The best thing to have in your case is probably a transition from working to not working. 10000 frames, 100000 frames. Whatever it takes.

                    Chattanooga, Tennessee, USA
                    A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                    DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                    Do Not Chat For Help! NO_WAN_EGRESS(TM)

                    S 1 Reply Last reply Reply Quote 0
                    • S
                      steve40 @Derelict
                      last edited by

                      0_1532558535343_when-its-broken.pcap

                      1 Reply Last reply Reply Quote 0
                      • S
                        steve40
                        last edited by

                        0_1532558669575_whenitworks.pcap

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                        • DerelictD
                          Derelict LAYER 8 Netgate
                          last edited by Derelict

                          Is there a package you haven't installed?

                          It also appears you are playing fast and loose with what is and isn't RFC1918.

                          Chattanooga, Tennessee, USA
                          A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                          DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                          Do Not Chat For Help! NO_WAN_EGRESS(TM)

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                          • DerelictD
                            Derelict LAYER 8 Netgate
                            last edited by Derelict

                            I see nothing in those captures to indicate a problem.

                            "when-its-broken" When exactly WHAT is broken?

                            Chattanooga, Tennessee, USA
                            A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                            DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                            Do Not Chat For Help! NO_WAN_EGRESS(TM)

                            1 Reply Last reply Reply Quote 0
                            • S
                              steve40
                              last edited by

                              Can no longer connect to the internet and the continuous ping comes to an immediate halt

                              1 Reply Last reply Reply Quote 0
                              • DerelictD
                                Derelict LAYER 8 Netgate
                                last edited by

                                Cannot connect to the internet from where and continuous pings to what? What does cannot connect mean? DNS resolution? HTTP? HTTPS? What? To where? From where?

                                Sorry, but you are going to have to be far more specific. From what you have posted it looks like there is no problem on the WAN.

                                I am fairly sure this is an issue in your virtual environment/switching that will not be solved by changing anything in the firewall settings.

                                https://www.netgate.com/docs/pfsense/routing/connectivity-troubleshooting.html

                                https://www.netgate.com/docs/pfsense/highavailability/troubleshooting-high-availability-clusters.html

                                Chattanooga, Tennessee, USA
                                A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                                DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                                Do Not Chat For Help! NO_WAN_EGRESS(TM)

                                1 Reply Last reply Reply Quote 0
                                • DerelictD
                                  Derelict LAYER 8 Netgate
                                  last edited by

                                  OK so it looks like there is no response to traffic when it is "broken" and the source is the CARP VIP. But the traffic is going out and there is no reply. You will need to investigate upstream and see why that is.

                                  I don't see any ARP requests for the CARP VIP, and certainly none that are going unanswered.

                                  So, it still points to something upstream probably in your layer 2.

                                  Chattanooga, Tennessee, USA
                                  A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                                  DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                                  Do Not Chat For Help! NO_WAN_EGRESS(TM)

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                                  • S
                                    steve40
                                    last edited by

                                    Gone through 3 switches now. 1 TP-link and two Cisco catalyst 2960G both reset to factory defaults running a completely vanilla out of the box config.

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                                    • DerelictD
                                      Derelict LAYER 8 Netgate
                                      last edited by

                                      And?

                                      Look at this file you sent: 1532558530465-when-its-broken.pcap

                                      Set a wireshark filter for icmp

                                      Start at frame 183 and look through frame 212.

                                      When the traffic is sourced from .172 (the CARP VIP) there is no response but the traffic IS being sent.

                                      When the traffic is sourced from .173 (the interface address) there is a response.

                                      You have to figure out what is going on UPSTREAM of the firewall that causes this to be true.

                                      I am going to move this to the Virtualization forum because that is where I'll bet your problem is. Some setting in the hypervisor. Maybe it will only allow one active MAC address on the interface at a time or something.

                                      Chattanooga, Tennessee, USA
                                      A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                                      DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                                      Do Not Chat For Help! NO_WAN_EGRESS(TM)

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                                      • S
                                        steve40
                                        last edited by

                                        Ok. Thanks for the reply

                                        Does anyone on the virtualization side have any ideas? Ive done pci passthrough via hostdev in libvirt xml and pci stubs in grub. Im under the impression that since the OS has no knowledge of the NIC card then neithier does libvirt since its a user space app. As i posted ealier freebesd sees the actual intel chipset instead of the standard e1000 emulated chip that QEMU provides to the guest. Also the mac addresses that pfsense sees on the NICs are those that are hardcoded on the hardware Additionally, the xml config has no entry for these nics and the centos cant even bring them up via ifup as the driver has never bound itself to the card.

                                        Maybe im missing something on the hypervisor side here but im under the impression that atandard anti spoofing mac address feature shouldnt apply here since libvirt is unaware of the existence or the card. Or is it?

                                        Thsnks

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