5508 with LAG setup and 5508 without LAG that connects to 2 switches configuration

5508

method 1:

You can setup a 5508 using ALL of its ports or 2 of its ports using only 1 LAG group to 1 PHYSICAL switch.

Method 2:

You can also setup a 5508 using 2 of its ports (primary and backup going to SWITCH A ) and using the other 2 of the ports (primary and backup going to SWITCH B). In this scenario, you do NOT want to use LAG and it should be disabled. According to Cisco, 5508 does not support STP and also you cannot use more then 1 LAG group and connect to to 2 physical switches unless they are connected without LAG . Here is a good reference:

Cisco Wireless Controller Configuration Guide, Release 8.0 - Configuring Link Aggregation [Cisco Wireless LAN Controlle…

If someone wants to chime in and provide a screenshot of what the management interface on the 5508 WLC will look like in the GUI for the 2nd scenario, its more then welcome! The CLI configuration on the switch side would look like this for method 1:

If you are setting up using method 1 with LAG, the switch configuration is as follows:

• Each neighbor port to which the controller is connected should be configured as follows:

  
  interface GigabitEthernet <interface id>
   switchport channel-group <id> mode on 
  no shutdown 
  

• The port channel on the neighbor switch should be configured as follows:

   interface port-channel <id> 
  switchport 
  switchport trunk encapsulation dot1q 
  switchport trunk native vlan <native vlan id> 
  switchport trunk allowed vlan <allowed vlans> 
  switchport mode trunk 
  no shutdown

On the controller for the 5508, you would enable LAG under the 'Controller' page, "LAG Mode on next reboot" set to "Enabled"

I will include screenshots at a later time.

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NTP setup on a 3650/3850 switch

NTP:

This is fairly easy.

Conf t

Ntp server 10.1.1.1

End

Use the command ' show ntp associations' to check.

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