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How many ICMPv6 multicast packets per second?
I got about 30,000 ICMPv6 Multicast packets (so also on every network port). Unfortunately it was VLAN1, the main-vlan for all computers, printers and servers -.- the calculated packets per second combined on all network ports results in 8,640,000 packets per second processed by the switches…
What does excessive IPv6 multicast listener report traffic mean?
My purpose is to share our experiences, symptoms, and commands used to identify the problem so that others faced with this situation can more quickly identify and isolate the problem. Certain Intel NICs, when the host machine goes to sleep, will send out excessive amounts of IPv6 multicast listener report traffic.
Where does the multicast listener report come from?
With the wirshark protocoll I could see that the multicast-pakets (“Multicast Listener Report”) were send from HP devices: You can also check the vendor on this site (thanks to Jason). This three devices are HP Z-Workstations. There are same problems also reported with HP EliteOne 800 and Lenovo computers.
Why is there no spanning tree in IPv6?
The usual suspects of spanning tree, broadcast storms, and high processor utilization were all missing. The lack of high processor utilization turns out to be a platform dependent and may be different on your network. We thought we had stabilized the network, but were proven wrong.
What causes a malformed or unhandled IP packet?
Malformed or Unhandled IP Packets will occur if you are using SonicOS standard firmware and there is a multi-casting device on the network. SonicOS Standard firmware cannot handle multicasting and will generate these errors. These errors were previously hidden and only displayed during debugging.
What happens if I don’t enable multicast on my SonicWall?
If Multicast support is not enabled on the interface, the SonicWall will drop this packet and log the message “Malformed or unhandled IP Packet dropped, IP Protocol 2”. To enable Multicast support on an interface, check the Enable Multicast Support box in the Interface configuration under the Advanced tab. (Enhanced firmware only)