I have a 4-switch stack of Alcatel Omniswitches connected to an HP 5412 core via 8 uplinks; these are ports D11-D18. Unfortunately, the client did not yet give me access to the Alcatels, but a request has been sent out. Meanwhile, I am seeing a high amount of TX/RX traffic on several ports in IMC regarding the core. An example:
In past experience, this is generally indicative of a loop of some sort. (Note: This is a school, and students have been known to intentionally plug in an Ethernet cord from one wall to another. We have plans to re-mediate this, believe me.)
The setup is rather simplistic in that there are a total of 324 Cisco WAPs, each connected to one of the four switches in the Alcatel stack with a 1 Gbit uplink. Now, on the core, when I run:
show lldp info remote-devices D11
(for each port. I did it one by one instead of a range to specify).
Each port from D11-D17 shows the MAC address of the Alcatel stack as well as the port to which it is connected in a fashing like:
PortId : 2024 // Switch #2 port 24
and so on. On port D18, however, the last port in the LAG, I see every single WAP. This is the case with both CDP and LLDP:
Is this normal behavior?