Concept Guide

222 | Dynamic DNS Registration Dell Networking W-Series Instant 6.5.1.0-4.3.1.0 | User Guide
Parameter Description
Example
Key Configures a Transaction Signature (TSIG)shared
secret key to secure the dynamic updates.
The following algorithm names are supported:
l hmac-md5 (used by default if algo-name is not
specified)
l hmac-sha1
l hmac-sha256
NOTE: When a key is configured, the update is
successful only if W-IAP and DNS server clocks are in
sync.
hmac-sha1:arubaddns:
16YuLPdH21rQ6PuK9udsVLtJw3Y=
Server IP Enter the server IP address of the DNSserver to
which the client updates are sent.
10.17.132.85
Interval Specify the time interval (in secs) at which the
DNSupdates are to be synced to the server. The
default time interval is 12 hours, minimum time
interval is 15 minutes, and maximum time interval is
100 days.
900
Table 48: Dynamic DNS Configuration Parameters
3. Click OK.
In the CLI:
To enable dynamic DNS on a W-IAP
(Instant AP)(config)# dynamic-dns-ap
(Instant AP)(config)# end
(Instant AP)# commit apply
To configure a TSIGkey and server IPaddress:
(Instant AP)(config)# dynamic-dns-ap key <algo-name:keyname:keystring>
(Instant AP)(config)# dynamic-dns-ap server <ddns_server>
(Instant AP)(config)# end
(Instant AP)# commit apply
To configure a time interval:
(Instant AP)(config)# dynamic-dns-interval <ddns_interval>
(Instant AP)(config)# end
(Instant AP)# commit apply
Configuring Dynamic DNSUpdates for Clients
You can enable DDNSupdates when creating or editing a DHCP scope for Distributed, L3 clients. When
enabled, the DDNSupdates of the clients are periodically sent during the specified time to the DNSserver that
is configured in the DHCPprofile. If there is no DNSserver configured in the DHCPprofile, the client
DNSupdates will be dropped. The DDNSupdates are secured by using TSIGshared secret keys, when
communicating between the client and the server. For more information, see Configuring Distributed DHCP
Scopes on page 209
.