Therefore, you are advised not to configure static multicast MAC addresses when the switch is running IGMP snooping. How do I find the original MAC address There must be a way to find it, because it is still burned permanently into the card, but I can't find a tool to read the burned in address. If 01-00-5E-00-00-12 is configured as a static multicast MAC address, VRRP protocol packets cannot be forwarded normally.

For example, the VRRP protocol uses a permanent IPv4 multicast address 224.0.0.18, which is mapped to multicast MAC address 01-00-5E-00-00-12. 1 You would have to add this to your /etc/systemd/network/work file: Neighbor Address LinkLayerAddress But the Description Interface eth0 autoconfigured by PVE suggests this file may be managed by some other software, so it is possible any changes to it may be overwritten.

That should be a line wich starts with default (or 0.0.0.0) and have the IP address to the router after. Use ip route list to see which default router your machine have. Use the new command that replace them and can do more, ip (8). When a static multicast MAC address is configured, a conflict may occur, causing data forwarding errors. 6 Answers Sorted by: 15 Don't use the obsoleted commands ifconfig (8), arp (8) or route (8). MAC address based Layer 2 multicast forwardingĪ conflict occurs in the following situation: If IGMP snooping is enabled and Layer 2 multicast forwarding mode is set to MAC address based mode, the switch generates IPv4 multicast MAC address entries with MAC addresses starting with 0x0100-5e. IP address based Layer 2 multicast forwarding Layer 3 multicast or both Layer 2 and Layer 3 multicast configured

Linux get default mac address