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Unable to ping from the WiSM version to the Supervisor Engine 720 or back


Core Issue

Consider this sample scenario with the Cisco Wireless Services Module (WiSM) and the Supervisor Engine 720:

The Virtual LAN (VLAN) xx is configured as the native VLAN, but on the WiSM, the management interface on the VLAN xx is also tagged with a VLAN identifier of xx.


The management and AP-manager interfaces must be left untagged, for example, VLAN ID 0, when they are on the native VLAN on the trunk. Remove the tags from the management interface.

Also if the ping is attempted over wireless, the management through wireless check box can be unchecked. The only pingable interface is the management interface. All the AP-managers and the dynamic interfaces do not support pings. The dynamic interfaces can only be pinged if they are mapped to the same port as the management interface. They only send Internet Control Message Protocol (ICMP) replies if the controller is under a light load, because the ICMP is placed as the lowest priority task.

Also, the management interface must be accessed with Layer 3 connectivity to the subnet on which the interface resides. If the management interface is 10.x.x.x, make sure the PC has full access to this subnet. In order to check this, try to access the GUI through secure HTTP. If this does not work, provide full access to the subnet.

Problem Type

Associated but cannot pass any traffic


Wireless Services Module (WiSM)

Catalyst 6500 with Sup 720

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