Cisco Cisco NAC Appliance 4.5 Release Notes
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Release Notes for Cisco NAC Appliance, Version 4.5(1)
OL-16409-01
Known Issues for Cisco NAC Appliance
Known Issues for Cisco NAC Appliance
This section describes known issues when integrating Cisco NAC Appliance:
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Known Issue with Mass DHCP Address Deletion
An issue exists in release 4.5(1) where a Clean Access Server configured to be a DHCP server can
become unmanageable if the administrator attempts to delete more than 800 DHCP addresses from the
appliance using the Clean Access Manager web console. If you have more than 800 DHCP addresses,
Cisco recommends deleting addresses in smaller blocks of no more than 800 addresses at a time.
become unmanageable if the administrator attempts to delete more than 800 DHCP addresses from the
appliance using the Clean Access Manager web console. If you have more than 800 DHCP addresses,
Cisco recommends deleting addresses in smaller blocks of no more than 800 addresses at a time.
In addition to ensuring you do not delete more than 800 DHCP addresses at a time, there are two methods
to work around this potential issue.
to work around this potential issue.
Workaround 1
The DHCP IP delete can be done manually by connecting to the CLI and executing the following
commands:
commands:
service perfigo stop
rm -f /var/state/dhcp/dhcpd.leases
touch /var/state/dhcp/dhcpd.leases
service perfigo start
If on an HA system, Cisco strongly recommends taking the CASs offline and performing the commands
on both machines simultaneously, taking particular care to issue the service perfigo start on the two
appliances at roughly the same time.
on both machines simultaneously, taking particular care to issue the service perfigo start on the two
appliances at roughly the same time.