In the Add Cluster dialogue box, enter the cluster name or database hostname.12.
Select Connect to this cluster check box. Click OK.13.
In the login for Cluster, put username and password. Click OK.14.
Q. How do I access CNR remotely if the CNR server is behind a firewall?
If the server is to be managed remotely, perhaps being monitored round−the−clock by a
network operation team, open the user interface ports. For getting the CNR GUI/CLI to open
thought the firewall open UDP ports 2785 and 2786. The first port is for the outgoing and the
second for the incoming data. Additionally, the well known ports for DHCP are 67 and 68,
for DHCP failover the port is 647, for DNS use port 53. Other ports that can be opened are
389 for LDAP and 69 for TFTP.
Q. What is a policy in CNR and how do I configure policies?
A policy is a set of options that allow you to group lease times and other configuration
parameters that a DHCP server assigns to a client. These parameters are called DHCP
options. Policies are useful if you have more than one scope at your site. You can create a
policy that applies to all the scopes on the current server, or create a policy for a selected
scope. Policies are a convenient way of ensuring that your DHCP server supplies all the
correct options for scopes, and frees you from the task of specifying the information
separately per scope.
To create a policy do the following:
Open up CNR GUI. From the Server Manager window, select the DHCP server for
which you want to create a policy. IF this is the first time you are doing this you will
click on DHCP@localhost server icon.
1.
Click the Show Properties toolbar button to display the DHCP Server Properties
dialog box.
2.
Click the Policies tab.3.
Click the New... button to display the New Policy dialog box.4.
In the Name field, enter the policy's name.5.
Do one of the following in the Copy from field:
Select an existing policy to use as the starting point for the new policy.◊
Select default to create a policy from scratch.◊
6.
Click OK.7.
On the Policies tab, choose whether you want the leases to be permanent (never
expire) or whether you want leases to have a duration. If you want them to be
permanent, check out the box "Leases are permanent" and skip to step 11, otherwise
continue to step 9.
8.
Set the duration of the lease, for example seven days. The default value is seven days.9.
Set the duration of the grace period, for example four days. The lease grace period is
the length of time that the lease is retained in the DHCP server's database after it has
expired. The grace period protects a client's lease in cases where the client and server
are in different time zones, the computer clocks are not synchronized, or the client
was not on the network when the lease expired. The default value is five minutes.
10.
Click Edit options.... The minimum options that you need to configure in a Cable
Network environment are:
11.
Cisco − CNR and DHCP FAQs for Cable Environment
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