Network flooded.

[Simcfc73]

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.

[Simcfc73]

Just found a UPNP setting in the camera browser. Think I'll get rid of that.

[Geoff]

Pretty poor if your switches can't handle multicast though.

[Simcfc73]

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.

[Ric_]

Wouldn't putting your cameras on their own VLAN help to prevent the propogation of the broadcast storm?