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Home > Success Center > Archive > 2017December15 - Deletes > Cisco DHCP Server: Value Cannot Be Null error

Cisco DHCP Server: Value Cannot Be Null error

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Issue:

When adding a Cisco DHCP server, testing of the credentials, IPAM reports that the scopes are discovered. However, when clicking on save for the dhcp server, the scopes are not added to the list. 
The following event error is seen: "System.ArgumentNullException: Value cannot be null".

IPAM will not accept dhcp pools without network and mask values.

Workaround:

Users should add the network address and mask while creating dhcp pools in Cisco devices.

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