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vm:proxmox:issues:no_dhcp_offer [2022/10/26 20:27] – niziakvm:proxmox:issues:no_dhcp_offer [2022/10/27 21:08] (current) – niziak
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 ====== No DCHPOFFERS received ====== ====== No DCHPOFFERS received ======
  
-Host networt was changed to use bond0 as vmbr0 interface. +Host network was changed to use bond0 as vmbr0 interface. 
-Now problems appears - guest cannot obtain IP address:+<code> 
 +01:00.0 Ethernet controller: Emulex Corporation OneConnect 10Gb NIC (be3) (rev 02) 
 +01:00.1 Ethernet controller: Emulex Corporation OneConnect 10Gb NIC (be3) (rev 02) 
 +</code> 
 + 
 +Now problems appears - guests (LXCs and VMs) cannot obtain IP address:
 <code> <code>
 dhclient[478]: DHCPDISCOVER on ens18 to 255.255.255.255 port 67 interval 7 dhclient[478]: DHCPDISCOVER on ens18 to 255.255.255.255 port 67 interval 7
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-Solution+===== Workaround ===== 
 Disable MAC learning on bridge. Now it behaves like hub, and every packet will be passed to every port. Disable MAC learning on bridge. Now it behaves like hub, and every packet will be passed to every port.
  
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 </code> </code>
  
 +===== Solution =====
 +
 +Upgrade Emulex OC11 card firmware to recent version. More here: [[hw:server:10gbe#firmware]]
 +
 +
 +====== References ======
 +
 +
 +Important:
 +  - [[https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1946028|DHCP Offer not traversing linux bridge]]
 +    - "Ok, I should have waited for the firmware upgrade before posting this. They seemed to be pretty outdated, went from FW v10.2.377.29 to v11.4.1186.4 And............... drum roll......... it worked. Fixed the problem."
 +
 +Others:
 +  - [[https://forum.proxmox.com/threads/guest-promisc.25090/#post-125788|guest promisc]]
 +  - [[https://forum.proxmox.com/threads/vm-push-eth-into-promisc-mode.5245/#post-37741|VM-push eth into promisc mode]]
 +  - [[https://forum.proxmox.com/threads/my-bridge-does-not-work.4726/page-2#post-31207|My bridge does not work]]
 +  - [[https://forum.proxmox.com/threads/be2net-driver.5275/#post-30345|]]
 +  - [[http://www.linux-kvm.org/page/HOWTO_BONDING|NIC Bonding]]
 +  - [[https://forum.proxmox.com/threads/network-sensor-monitor-session-promiscuous.37845/#post-434741|Network Sensor (monitor session - promiscuous)]]
 +  - [[https://forum.proxmox.com/threads/send-mirrored-traffic-into-guest-vm.48002/#post-225399|Send mirrored traffic into guest vm]]