LLDP (Link Layer Discovery Protocol) Follow

Reference model:

• Switch model name:

- AS7726-32X

- AS7326-56X

- AS7816-64X

- AS5835-54X(T)

- AS4630-54PE

- AS9716-32D

- AS8000(Minipack)

- Wedge100BF-32X

• Edgecore SONiC version: 

- Edgecore-SONiC_20201123_130028_ec202006_74

- Edgecore-SONiC_20201229_070315_ec202006_101

- Edgecore-SONiC_20201229_070315_ec202006_bfn_65(Wedge100BF-32X)

Restriction:

1. There is no SONiC command to disable LLDP.  (Workaround: "sudo systemctl stop lldp.service". However, LLDP service restart after rebooting)
   • Start/Stop LLDP service:  sudo systemctl [start|stop] lldp
   • Enable/Disable LLDP service by default: sudo systemctl [enable|disable] lldp

Default setting:

1. LLDP is enabled
2. LLDP PDU interval : 30 seconds
3. Support LLDP extended MIB (lldpremtable, lldplocporttable, lldpremmanaddrtable, lldplocmanaddrtable, lldpLocalSystemData).  Refer to SNMP configuration

Procedures:

Step 1. check LLDP table

admin@sonic:~$ show lldp table
Capability codes: (R) Router, (B) Bridge, (O) Other
LocalPort    RemoteDevice    RemotePortID    Capability    RemotePortDescr
-----------  --------------  --------------  ------------  -----------------
Ethernet48   sonic           Eth49/1         BR            Ethernet48
eth0         tor-1.on.ec     swp27           BR            swp27
--------------------------------------------------

Total entries displayed:  2

Step 2. check LLDP neighbor

admin@sonic:~$ show lldp neighbors Ethernet48
-------------------------------------------------------------------------------
LLDP neighbors:
-------------------------------------------------------------------------------
Interface:    Ethernet48, via: LLDP, RID: 2, Time: 0 day, 00:07:28
  Chassis:
    ChassisID:    mac 80:a2:35:4f:4f:40
    SysName:      sonic
    SysDescr:     Debian GNU/Linux 10 (buster) Linux 4.19.0-6-2-amd64 #1 SMP Debian 4.19.67-2+deb10u2 (2019-11-11) x86_64
    MgmtIP:       188.188.97.31
    MgmtIP:       2001::82a2:35ff:fe4f:4f40
    Capability:   Bridge, on
    Capability:   Router, on
    Capability:   Wlan, off
    Capability:   Station, off
  Port:
    PortID:       local Eth49/1
    PortDescr:    Ethernet48
    TTL:          120
-------------------------------------------------------------------------------