Unable to configure LLDP on SRX4100, SRX4200, SRX4600, SRX5400, SRX5600, SRX5800.

LLDP hierarchy does not exist in configuration:

root@firewall# set protocols l

^

'l' is ambiguous.

Possible completions:

> l2-learning Layer 2 forwarding configuration

> l2circuit Configuration for Layer 2 circuits over MPLS

> l2iw Configuration for Layer 2 interworking

> l2vpn Configuration for Layer 2 VPN circuits over MPLS

> lacp Link Aggregation Control Protocol configuration

> layer2-control Global options for layer 2 protocols

> ldp LDP options

> lldp-med LLDP Media Endpoint Discovery

> loop-detect Layer2 Loop Detect on interface with non-IP L2 Multicast mac as destination mac

On SRX HE, LLDP is available starting release 21.1R1, before 21.1R1 the LLDP hierarchy does not exist as is not supported:

https://prsearch.juniper.net/problemreport/PR1485290