LLDP don't work correctly
AR2240 and S5700
AR2240 GigabitEthernet0/0/2 is directly connected to S5700 GigabitEthernet0/0/24 (by fiber optics) LLDP is globaly enabled on both devices.
interface GigabitEthernet0/0/2 description "Downlink Huawei S5700"
# interface GigabitEthernet0/0/2.5 dot1q termination vid 5
ip binding vpn-instance netconf
ip address 10.100.136.30 255.255.255.248
port link-type trunk port trunk allow-pass vlan 2 to 4094
undo ntdp enable undo ndp enable
AR2240 sees lldp neighbors correctly:
GigabitEthernet0/0/2 has 1 neighbors:
Neighbor index : 1
Chassis type :macAddress
Chassis ID :cccc-8150-5b7a
Port ID type :interfaceName
Port ID :GigabitEthernet0/0/24
Port description :GigabitEthernet0/0/24
System name :mytyschi-dsw01
System description :S5700-28C-EI-24S Huawei Versatile Routing Platform Software VRP (R) software, Version 5.150 (S5700 V200R005C00SPC500) Copyright (C) 2000-2015 HUAWEI TECH CO., LTD
System capabilities supported :bridge router
System capabilities enabled :bridge router
Management address type :ipV4
Management address : 10.100.136.25
Expired time :110s
Port VLAN ID(PVID) :1 VLAN name of VLAN 1: VLAN 0001 Protocol identity :
BUT S5700 DON’T HAVE neighbors
[mytyschi-dsw01]displ lldp neighbor
GigabitEthernet0/0/24 has 0 neighbor(s) AND in lldp statistics Received Frames Total: 0 Statistics for GigabitEthernet0/0/24: Transmitted Frames Total: 12191 Received Frames Total: 0
First of all need check configuration, if cofiguration is correct, collect trafic capture and log.
In packet capture we will see that there is lldp between devices, so S5700 must receive lldp frames correctly, if we look at configuration we will see “bpdu disable” at interface.
This is our problrm becasuse lldp is also bpdu and all bpdu's will be droped saw neighbour can be seen at this interface.
for this isuue root cause is configuration error
customer configure “bpdu disable” but LLDP packet is also BPDU packets and will be droped by this