Forum Discussion
TimLB
Jan 18, 2023Steel Contributor
Advice needed for troubleshooting emergency location by ChassisID/Port
First, we have our offices identifying location by subnets and wireless access point BSSIDs. We were asked to get better accuracy, so that led us down towards trying to location the users by the swit...
jangliss
Jan 19, 2023Steel Contributor
Have you confirmed your switch does send LLDP information? One gotcha I've found while setting this up is that it must match exactly what the switch is broadcasting. I've found using things like `show lldp neighbors` to be misleading. The best option is to launch wireshark and set a display filter for lldp, then listen to what is being sent for the Chassis ID and the Port ID fields. I'll try grabbing an example today and show you. Juniper switches have the Port ID as a numeric value (usually same as SNMP Interface ID), while Cisco often has the Port ID matching the interface name such as ge-0/0.
What operating system are you using? It's been a while since I looked, but the Mac Teams client required an external application to make it work, not sure if that was resolved or not. For PC, Windows 10 was required, I don't think any elevated permissions were required though.
Another gotcha to be aware of is the Chassis ID can change on switches, depending on the manufacturer and their programming, if the master changes, or the master is replaced, your location will stop matching. To get around this, in installs I've done, we add all the switch Chassis IDs. Read the documentation for your switches here.
What operating system are you using? It's been a while since I looked, but the Mac Teams client required an external application to make it work, not sure if that was resolved or not. For PC, Windows 10 was required, I don't think any elevated permissions were required though.
Another gotcha to be aware of is the Chassis ID can change on switches, depending on the manufacturer and their programming, if the master changes, or the master is replaced, your location will stop matching. To get around this, in installs I've done, we add all the switch Chassis IDs. Read the documentation for your switches here.
- TimLBJan 31, 2023Steel ContributorWe're using Windows 10/11 devices. I'm really inclined to get a Mac at this point because they have that program that needs to be installed on them. As far as I've researched, it seems like LLDP should just be "on" as long as the driver is on the machine. The driver is on the device that I'm trying to get working and it is enabled.