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March 30th, 2015 14:00
IPv6 Filtering Best Practices
I have a network that is using all Dell Power Connect switches. Beginning in late December, I began noticing a large amount of IPv6 traffic being generated from what I can tell Dell desktops within my network. While using Wireshark, I notice tons of "Multicast Listener Report" which is saturating the network. We believe this is being caused by NIC drivers that need to be updates.
Regardless of the driver update, I'm attempting to figure out a way to lessen the affect of these broadcast across the network. I would like to find a way to filter out or block the IPv6 broadcast from affecting all areas of network.
I currently have a PC 7024F as a main core switch. Each building has a PC 6024 and each floor wiring closet are PC 5324.
Note; the effect is not affecting server or desktops since they are rejecting the packets, the items being affected are systems that are appliances.
Any feedback or suggesting would be greatly associated
Randy
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DELL-Josh Cr
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March 30th, 2015 16:00
Hi Randy,
Are you able to only use ipv4 traffic on those systems? You may be able to filter the ipv6 traffic with an Access control list but it still might cause excess traffic to hit the switch. You would want to do this on the access layer of the network, but the 5324 doesn’t have ACL, so you would have to do it on the 6024. Page 77 http://downloads.dell.com/Manuals/Common/powerconnect-6024_User%27s%20Guide2_en-us.pdf
You could probably block the port the multicasts are on.
ranweb
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April 1st, 2015 11:00
Josh,
Thank you for replying. Currently, there is only IPv4 traffic on the network. I'll review the link provided. In reference to ports that the multicast are on, because of the nature of the broadcast, originating from desktops with non-updated NIC drivers, the ports are all over the network.