Hi All,
Having a small issue at the moment with a 2 * 3850 switch stack.
The stack isn't displaying mac learned on certain ports. The ports affected are spread over both switches. There is 14 ports having this issue. All other ports are working fine.
I plugged my laptop into a working port and I could see the mac addres. I then plugged it into one of the ports having the issue and I could no longer see the mac address. When my laptop was connected to both ports I was able to get a DHCP address and connect to the rest of the network without issues. Likewise I'm able to ping the end devices connected to the ports.
The config on the switch ports is straight forward and is the same on all the ports.
Switch model WS-C3850-48P running version 03.02.02.SE
Anyone any ideas ? Upgrade the software ?
Thanks
Non Working Port
interface GigabitEthernet2/0/27
description ** ACCESS PORT **
switchport access vlan 204
switchport mode access
switchport voice vlan 203
no snmp trap link-status
storm-control broadcast level 5.00
spanning-tree portfast
end
3850_PCB_1F#sh int g2/0/27
GigabitEthernet2/0/27 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is c025.5c12.029b (bia c025.5c12.029b)
Description: ** ACCESS PORT **
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/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 00:00:12, output never, output hang never
Last clearing of "show interface" counters 00:06:31
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 1000 bits/sec, 1 packets/sec
5 minute output rate 268000 bits/sec, 80 packets/sec
600 packets input, 142105 bytes, 0 no buffer
Received 19 broadcasts (13 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 13 multicast, 0 pause input
0 input packets with dribble condition detected
28641 packets output, 11600076 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
5 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
3850_PCB_1F#sh mac add i g2/0/27
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
Working Port
interface GigabitEthernet2/0/19
description ** ACCESS PORT **
switchport access vlan 204
switchport mode access
switchport voice vlan 203
no snmp trap link-status
storm-control broadcast level 5.00
spanning-tree portfast
end
3850_PCB_1F#sh int g2/0/19
GigabitEthernet2/0/19 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is c025.5c12.0293 (bia c025.5c12.0293)
Description: ** ACCESS PORT **
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/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 00:00:05, output never, output hang never
Last clearing of "show interface" counters 00:09:46
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 321000 bits/sec, 106 packets/sec
355 packets input, 27400 bytes, 0 no buffer
Received 21 broadcasts (20 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 20 multicast, 0 pause input
0 input packets with dribble condition detected
52866 packets output, 21458519 bytes, 0 underruns
0 output errors, 0 collisions, 0 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
3850_PCB_1F#sh mac add i g2/0/19
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
204 ccf9.5496.582a DYNAMIC Gi2/0/19
203 ccf9.5496.582a DYNAMIC Gi2/0/19
Total Mac Addresses for this criterion: 2
