Just to add to my week of network problems at about 3pm this afternoon my network experienced a major broadcast event. Everything ground to a halt and all the switches were going crazy, my machine forze completely and I couldn't do anything.
Went to server and ran ethereal and found that it was my axis security cameras using SSDP to address 239.255.255.250 with NOTIFY/1.1 in the info part of the scan. Thats all the traffic that was generated.
Not happy.
Just found a UPNP setting in the camera browser. Think I'll get rid of that.
Pretty poor if your switches can't handle multicast though.
Well I thought I had sorted it but it happned over the weekend (one of the IP cameras hadn't switched its UPNP setting off) and again today with a different broadcast problem so I've spent most of the day updating firmware.
The documentation of my new switch says it should handle broadcasts but I found that the latest firmware had this fix
New Features
Added the options to disable or enable "Block packets with unknown multicast address" on "Enable/Disable IGMP" page.
Which should help.
I decided to get a Netgear GSM7224 too and slowly replace the fibre switch by buying modules every now and again.
Wouldn't putting your cameras on their own VLAN help to prevent the propogation of the broadcast storm?
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