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New Member

Connectivity between 3850 and wireless radio controller

We are connecting a remote warehouse to corporate office through wireless radio controllers. we connected corporate office controller to a 3750 and configured the port as trunk. we connected the remote controller to a new 3850 switch. we are unable to ping radio controllers or switches. Any help would be greatly appreciated.

VIP Super Bronze

Is the link between the 2

Is the link between the 2 devices up and running?

Did you configure the link on both 3750 and 3850 as trunk?

Can you post configs from both devices?




New Member

when I was connected to the

when I was connected to the wireless controller directly, I was able to ping them both so the connectivity between controllers is good. I think issue is on the switch side.


Config for the trunk port on 3750 is


LAN-B55-F3-R325-SW01#sh run int g1/0/1
Building configuration...

Current configuration : 348 bytes
interface GigabitEthernet1/0/1
 description *** Connection to Radio Controller ***
 switchport trunk encapsulation dot1q
 switchport mode trunk
 switchport nonegotiate
 srr-queue bandwidth share 1 30 35 5
 priority-queue out
 mls qos trust dscp
 auto qos trust dscp
 storm-control broadcast level 50.00
 storm-control multicast level 50.00

New Member

Yes I created both links as

Yes I created both links as trunk on 3850 and 3750.


Config for 3850 trunk port is as follows


interface GigabitEthernet1/0/48
 description *** Connection to Radio Controller ***
 switchport mode trunk
 storm-control broadcast level 50.00
 storm-control multicast level 50.00
 auto qos trust dscp
VIP Super Bronze

The switches are just layer-2

The switches are just layer-2 with no IPs.  So, if there is no IP an the switches you can't ping them but if you can ping from one controller to the other through the switches than the connectivity is good.

The trunk configs are correct.


New Member

I am not able to ping

I am not able to ping controllers from the either switches.

VIP Super Bronze

But do the switches have any

But do the switches have any IP configured on them?

If the switches don't have IPs you can't ping from them.


New Member

Interface is showing up up.

Interface is showing up up.


LAN-B55-F3-R325-SW01#sh int g1/0/1
GigabitEthernet1/0/1 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is d48c.b596.c501 (bia d48c.b596.c501)
  Description: *** Connection to Radio Controller ***
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100/1000BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 363
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 10000 bits/sec, 18 packets/sec
  5 minute output rate 86000 bits/sec, 135 packets/sec
     514671015 packets input, 73497025643 bytes, 0 no buffer
     Received 1085394 broadcasts (366403 multicasts)
     0 runts, 2 giants, 0 throttles
     1 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 366403 multicast, 0 pause input
     0 input packets with dribble condition detected
     612703588 packets output, 91643874369 bytes, 0 underruns
     0 output errors, 0 collisions, 3 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out

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