If the neighbors are correctly shown via the command line on both sides, not just one.
show lldp neighbors
Then then the configurations will be correct. So the issue will be with the Mist portal software not correctly importing the discovered configuration. You likely will need to open a support ticket there.
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Steve Puluka BSEET - Juniper Ambassador
IP Architect - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP - Retired)
http://puluka.com/home------------------------------
Original Message:
Sent: 01-21-2025 10:52
From: JOHN WILLIAMSON
Subject: LLDP. What would keep a core switch from seeing an edge switch with LLDP?
I've revisited all the switches that are not shown properly in the Mist "Topology" view, this morning. All of them do see their neighbors. They just have incorrect layouts in the Topology view. All my sites should have the MDF as the top of the tree, but I have some sites that have a switch at the same level or in one case a Dell computer.
I'll start a new topic for the issue.
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JOHN WILLIAMSON
Original Message:
Sent: 01-21-2025 10:11
From: JOHN WILLIAMSON
Subject: LLDP. What would keep a core switch from seeing an edge switch with LLDP?
All of our switches have the following setting by using switch templates:
set protocols lldp port-id-subtype interface-name
set protocols lldp port-description-type interface-alias
set protocols lldp interface all
set protocols lldp-med interface all
I have confirmed that the core switch and edge switch both still have that configuration.
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JOHN WILLIAMSON
Original Message:
Sent: 01-17-2025 19:57
From: spuluka
Subject: LLDP. What would keep a core switch from seeing an edge switch with LLDP?
I would start by confirming the lldp status on the affected switches
show lldp neighbors
And if the neighbors are indeed not up and running, confirm that both the interfaces and the lldp protocol sections are complete on the both adjacent switches per this documentation.
https://www.juniper.net/documentation/us/en/software/junos/user-access/topics/topic-map/device-discovery-using-lldp-lldp-med.html
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Steve Puluka BSEET - Juniper Ambassador
IP Architect - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP - Retired)
http://puluka.com/home
Original Message:
Sent: 01-16-2025 16:19
From: JOHN WILLIAMSON
Subject: LLDP. What would keep a core switch from seeing an edge switch with LLDP?
I have a few locations at our schools where the core switch doesn't "see" the edge switch, but they work just fine. I noticed this first in the Mist dashboard. The edge switch didn't show what the uplink port was connected to. In the CLI, the edge switch sees the core switch, but the core does not see the edge switch. I have about 4 sites that have one switch hanging out on it's own in the topology view and the LLDP issue looks to be the cause.
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JOHN WILLIAMSON
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