No DHCP through vmbr

[dukynuky]

hi,

i have a problem with my proxmox home server.

Modem - seperate proxmox nic - vmbr1 - pfsense

i cant get pfsense to receive a IP with DHCP from the modem. In tcpdump i can see the request on pfsense, on the vmbr and on the physical interface.
The reply only on physical and vmbr. Yes i configured the same mac as on the physical networkcard on the virtual one on the vm.

When i activate dhcp on physical on the proxmox host, dhcp is working. Same on the vmbr1. Pfsense cant get the IP. I already used a plane debian connected to vmbr and it isnt working to.

Now i have no clue, where to look next.

On Vm tcpdump:
13:49:51.334664 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:23:55:7c:16:82, length 300
13:49:59.347717 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:23:55:7c:16:82, length 300

On proxmox host tcpdump vmbr1:
13:49:51.331465 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:23:55:7c:16:82, length 300
13:49:51.347901 IP 83.169.185.2.67 > 91.45.155.192.68: BOOTP/DHCP, Reply, length 308
13:49:59.344535 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:23:55:7c:16:82, length 300
13:49:59.368725 IP 83.169.185.2.67 > 91.45.155.192.68: BOOTP/DHCP, Reply, length 308

proxmox network config:

iface enp4s0 inet manual
auto vmbr1
iface vmbr1 inet manual
bridge-ports enp4s0
bridge-stp off
bridge-fd 0


Edit: i can see ARP requests from the cable network behind the modem on the vm interface. only the dhcp replys seems to be getting lost on the proxmox host

thanks

dukynuky

 

[dukynuky]

Detailed packet info from proxmox host vmbr1:

14:41:32.285841 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328)
    0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:23:55:7c:16:82, length 300, xid 0x7112d58c, secs 17,                                                          Flags [none]
          Client-Ethernet-Address 00:23:55:7c:16:82
          Vendor-rfc1048 Extensions
            Magic Cookie 0x63825363
            DHCP-Message Option 53, length 1: Discover
            Client-ID Option 61, length 7: ether 00:23:55:7c:16:82
            Hostname Option 12, length 7: "pfSense"
            Parameter-Request Option 55, length 10:
              Subnet-Mask, BR, Time-Zone, Classless-Static-Route
              Default-Gateway, Domain-Name, Domain-Name-Server, Hostname
              Option 119, MTU
14:41:32.304787 IP (tos 0x0, ttl 64, id 0, offset 0, flags [none], proto UDP (17), length 336)
    83.169.185.2.67 > 91.45.155.192.68: BOOTP/DHCP, Reply, length 308, xid 0x7112d58c, Flags [none]
          Your-IP 91.45.155.192
          Gateway-IP 83.169.166.98
          Client-Ethernet-Address 00:23:55:7c:16:82
          Vendor-rfc1048 Extensions
            Magic Cookie 0x63825363
            DHCP-Message Option 53, length 1: Offer
            Server-ID Option 54, length 4: 83.169.185.2
            Lease-Time Option 51, length 4: 3958
            Subnet-Mask Option 1, length 4: 255.255.255.0
            BR Option 28, length 4: 91.45.155.255
            Default-Gateway Option 3, length 4: 91.45.155.254
            Domain-Name-Server Option 6, length 8: 83.169.185.33,83.169.185.97
            Hostname Option 12, length 22: "x1-6-00-23-55-7c-16-82"

 

[dukynuky]

Dont ask how and why.. it is working now.. just did the 1000 restart of the proxmox host...