01-03-2012 10:14 PM
I have two core Juniper switches EX-8208 and manay access switches EX-4200. Through LLDP neighbour command I am able to get couple of information regarding neighbour switches but the outpu is not showing any IP of the neighbouring switch. Although there is one MGT VLAN is there on all switches and every switch has on IP on that MGT VLAN.
Can any body tell me what is the problem?
Solved! Go to Solution.
01-07-2012 10:45 AM
In order to see the ip addresses in lldp, you have to configure lldp to advertise the management-address you want, like so:
[edit protocols lldp]
user@switch# set management-address 192.168.0.1
It's buried in the documentation:
Then use "show lldp neighbor interface <whatever>" to view the neigbor's ip address.
Hope that helps,
02-18-2013 08:25 AM
Have you also turned on LLDP-MED?
EX-series switches use Link Layer Discovery Protocol (LLDP) and Link Layer Discovery
Protocol Media Endpoint Discovery (LLDP-MED) to learn and distribute device
information on network links. The information allows the switch to quickly identify
a variety of devices, resulting in a LAN that interoperates smoothly and efficiently.
LLDP-capable devices transmit information in Type Length Value (TLV) messages to
neighbor devices. Device information can include specifics, such as chassis and port
identification and system name and system capabilities. The TLVs leverage this
information from parameters that have already been configured in the JUNOS
LLDP-MED goes one step further, exchanging IP-telephony messages between the
switch and the IP telephone. These TLV messages provide detailed information on
PoE policy. The PoE Management TLVs let the switch ports advertise the power level
and power priority needed. For example, the switch can compare the power needed
by an IP telephone running on a PoE interface with available resources. If the switch
cannot meet the resources required by the IP telephone, the switch could negotiate
with the telephone until a compromise on power is reached.
I hope this helps a little bit.