Wireless Access

I have (2) 7240s connected to some Juniper switches. LLDP is enabled on all interfaces and both devices but I'm not receiving any neighbors from the Juniper devices. The Juniper devices show the Arubas. Has anyone had any difficulty with LLDP and Junipers?

 

(Aruba7240-Master-New) (config) #show lldp neighbor 

Capability codes: (R)Router, (B)Bridge, (A)Access Point, (P)Phone, (S)Station
                  (r)Repeater, (O)Other
LLDP Neighbor Information
-------------------------
Local Intf  Chassis ID  Capability  Remote Intf  Expiry (Secs)  System Name
----------  ----------  ----------  -----------  -------------  -----------

Number of neighbors: 0

(Aruba7240-Master-New) (config) #show lldp statistics 

LLDP Statistics
---------------
Interface  Received  Unknown TLVs  Malformed  Transmitted
---------  --------  ------------  ---------  -----------
GE0/0/0    0         0             0          33
GE0/0/1    0         0             0          32
GE0/0/2    0         0             0          32
GE0/0/3    0         0             0          32
GE0/0/4    0         0             0          32
GE0/0/5    0         0             0          31

WIRELESS_SWITCH> show lldp neighbors 
Local Interface    Parent Interface    Chassis Id          Port info          System Name
ge-0/0/3           ae4                 00:1a:1e:02:0a:58   MGMT_INTERFACE     DC-Aruba7240-Master-New
ge-1/0/3           ae4                 00:1a:1e:02:0a:58   MGMT_INTERFACE     DC-Aruba7240-Master-New
ge-0/2/2           ae1                 00:1a:1e:02:0a:58   INTERNAL           DC-Aruba7240-Master-New
ge-1/2/2           ae1                 00:1a:1e:02:0a:58   INTERNAL           DC-Aruba7240-Master-New
ge-1/0/5           ae5                 00:1a:1e:02:0a:f0   MGMT_INTERFACE     DC-Aruba7240-Local-1-New
ge-0/0/5           ae5                 00:1a:1e:02:0a:f0   MGMT_INTERFACE     DC-Aruba7240-Local-1-New
ge-1/2/3           ae2                 00:1a:1e:02:0a:f0   INTERNAL           DC-Aruba7240-Local-1-New
ge-0/2/3           ae2                 00:1a:1e:02:0a:f0   INTERNAL           DC-Aruba7240-Local-1-New
ge-1/2/0           ae0                 88:e0:f3:6a:bb:40   LAG to Wireless Distribution GNHQ01SW1           
ge-1/2/1           ae0                 88:e0:f3:6a:bb:40   LAG to Wireless Distribution GNHQ01SW1           
ge-0/2/0           ae0                 88:e0:f3:6a:bb:40   LAG to Wireless Distribution GNHQ01SW1           
ge-0/2/1           ae0                 88:e0:f3:6a:bb:40   LAG to Wireless Distribution GNHQ01SW1     

 

On the Aruba controllers do you have these commands enabled under the interfaces plug back to the Juniper switches:
interface gigabitethernet 0/0/0
lldp transmit
lldp receive

Yes. I've enabled those on all ports.

Seems to work for me (Aruba3200 + Juniper EX3300 in VirtualChassis):

 

 

(aruba-master) #show lldp neighbor

Capability codes: (R)Router, (B)Bridge, (A)Access Point, (P)Phone, (S)Station
                  (r)Repeater, (O)Other
LLDP Neighbor Information
-------------------------
Local Intf  Chassis ID         Capability  Remote Intf       Expiry (Secs)  System Name
----------  ----------         ----------  -----------       -------------  -----------
GE1/0       ec:3e:f7:67:6a:40  B:R         Aruba-Controller  94             31switch1
GE1/1       ec:3e:f7:67:6a:40  B:R         Aruba-Controller  119            31switch1

 

 

 

Are you sure you have "lldp receive" enabled on the physical interfaces? (not port channel)

Yes, attached is the int config. 

 

I've also noticed that the Juniper is transmitting the units as well. The transmit and received packets on the Juniper are increasing equally, but the Aruba is only Transmitting.

 

interface gigabitethernet 0/0/0
        description "MGMT_INTERFACE"
        trusted
        trusted vlan 1115
        switchport mode trunk
        switchport trunk allowed vlan 1115
        lacp group 2 mode active
        lldp transmit
        lldp receive
        lldp med
!

interface gigabitethernet 0/0/1
        description "MGMT_INTERFACE"
        trusted                                   
        trusted vlan 1115
        switchport mode trunk
        switchport trunk allowed vlan 1600
        lacp group 2 mode active
        lldp transmit
        lldp receive
        lldp med
!

interface gigabitethernet 0/0/2
        description "INTERNAL"
        trusted
        trusted vlan 1115
        switchport mode trunk
        switchport trunk allowed vlan 1115
        lacp group 0 mode active
        lldp transmit
        lldp receive
        lldp med
!

interface gigabitethernet 0/0/3
        description "INTERNAL"
        trusted
        trusted vlan 1115
        switchport mode trunk
        switchport trunk allowed vlan 1115
        lacp group 0 mode active
        lldp transmit
        lldp receive
        lldp med
!

interface gigabitethernet 0/0/4
        description "GUEST_PHY_WIFI"
        no trusted vlan 1-4094
        switchport mode trunk
        lacp group 1 mode active
        lldp transmit
        lldp receive
        lldp med
!

interface gigabitethernet 0/0/5
        description "GUEST_PHY_WIFI"
        no trusted vlan 1-4094
        switchport mode trunk
        lacp group 1 mode active
        lldp transmit
        lldp receive
        lldp med
!

Aruba:

LLDP Statistics
---------------
Interface Received Unknown TLVs Malformed Transmitted
--------- -------- ------------ --------- -----------
GE0/0/0 0 0 0 2
GE0/0/1 0 0 0 2
GE0/0/2 0 0 0 2
GE0/0/3 0 0 0 2
GE0/0/4 0 0 0 2
GE0/0/5 0 0 0 2

 

Juniper:

WIRELESS_SWITCH> show lldp statistics
Interface Parent Interface Received Unknown TLVs With Errors Discarded TLVs Transmitted Untransmitted
ge-1/0/1 ae3 0 0 0 0 3 0
ge-1/0/5 ae5 2 0 0 0 2 0
ge-0/0/1 ae3 0 0 0 0 3 0
ge-0/0/22 - 0 0 0 0 2 0
ge-0/2/2 ae1 3 0 0 0 3 0
ge-1/0/22 - 0 0 0 0 3 0
ge-0/0/5 ae5 2 0 0 0 3 0
ge-0/2/1 ae0 3 0 0 0 3 0
ge-1/2/1 ae0 3 0 0 0 3 0
ge-0/2/0 ae0 3 0 0 0 3 0
ge-1/2/0 ae0 3 0 0 0 3 0
ge-1/2/2 ae1 3 0 0 0 3 0
ge-1/2/3 ae2 2 0 0 0 2 0
ge-0/2/3 ae2 2 0 0 0 3 0
ge-0/0/3 ae4 2 0 0 0 3 0
ge-1/0/3 ae4 2 0 0 0 3 0

 

 

Can you post the relevant Juniper LLDP config as well?

 

I'm not sure why you would enable LLDP MED on the Aruba-side btw; for the Aruba controller the Juniper switch is not really an endpoint :)

I'm not sure why you would enable LLDP MED on the Aruba-side btw; for the Aruba controller the Juniper switch is not really an endpoint :)

 

Thats due to my über knowledge of LLDP protocol!

Actually, I did it because it was the only setting left I could fine that might stop it from working. I read up on it later and realized it wasn't what I thought.

 

 

Can you post the relevant Juniper LLDP config as well?

 

set protocols lldp management-address 172.21.0.2
set protocols lldp interface all
set protocols lldp-med interface all

Controller addresses are 172.21.0.20/21.

 

I have found the issue. 

 

Looks like LLDP receiving packets are processed on the default-vlan. If you disable it then the LLDP packets are dropped. If there is a way to change this, please let me know.

 

I've enabled vlan 1 on my internal port channels and now LLDP is updating properly.

Thanks playinpearls.

 

This is still the case in ArubaOS 6.5.2.1. Our WLC's are port-channeled to Cisco's routers. I had the same issue in which the routers were sending and recieving lldp packets but the WLC's were sending but not recieving. Once I added "switchport truck allowed vlan add 1" to the uplink Port-Channel on the WLC's, the lldp neighbors starting populating.

-Josh