bulletin blues
Lifetime Supporting Member
Hello.
I have a question about multicast packets over produced tags.
I've got a home lab setup, and I'm trying to get a better understanding of my cisco switches.
I have a controllogix rev 19, 4 slot chassis. I have a processor in slot 0, and 1756 enbt in slot 1. I have another processor in slot 2, with a second 1756 enbt in slot 3.
Both of the ENBT's get tied to some various other cisco switches, which get trunked back to a 3550.
I have a produced tag from the processor in slot 0, sent out the enbt in slot 1 to a switch. It is being consumed by the processor in slot 2, via the some cisco switches back into the enbt in slot 3. This is working properly, as when I modify the produced tag values in the first processor, it gets updated in the consumed tag processor.
I DO NOT have the use UNICAST selected in the produced tag configuration. This should be multicasting, and I would think that I would see some multicast memberships in the IGMP stats in each of the processor web pages. But I don't.
I also don't see any multicast info in my cisco switches.
I'm running wireshark to see what I can see, but I'm just seeing direct source to destination addresses between the processors, not the default multicast (239.x.x.x, etc) addresses between processors. I'm also doing some routing, which may also be complicating the issue. It may be worth it to unplug everything and just set them all to the same subnet and plug into one switch, but everything else seems to be working.
Also, I've got a myriad of USB network adaptors, connected to usb hubs, running through vm's that may be complicating the issue.
Is it possible that Logix is sending the tags through the backplane?
Any insight is appreciated.
Thanks.
I have a question about multicast packets over produced tags.
I've got a home lab setup, and I'm trying to get a better understanding of my cisco switches.
I have a controllogix rev 19, 4 slot chassis. I have a processor in slot 0, and 1756 enbt in slot 1. I have another processor in slot 2, with a second 1756 enbt in slot 3.
Both of the ENBT's get tied to some various other cisco switches, which get trunked back to a 3550.
I have a produced tag from the processor in slot 0, sent out the enbt in slot 1 to a switch. It is being consumed by the processor in slot 2, via the some cisco switches back into the enbt in slot 3. This is working properly, as when I modify the produced tag values in the first processor, it gets updated in the consumed tag processor.
I DO NOT have the use UNICAST selected in the produced tag configuration. This should be multicasting, and I would think that I would see some multicast memberships in the IGMP stats in each of the processor web pages. But I don't.
I also don't see any multicast info in my cisco switches.
I'm running wireshark to see what I can see, but I'm just seeing direct source to destination addresses between the processors, not the default multicast (239.x.x.x, etc) addresses between processors. I'm also doing some routing, which may also be complicating the issue. It may be worth it to unplug everything and just set them all to the same subnet and plug into one switch, but everything else seems to be working.
Also, I've got a myriad of USB network adaptors, connected to usb hubs, running through vm's that may be complicating the issue.
Is it possible that Logix is sending the tags through the backplane?
Any insight is appreciated.
Thanks.