Cisco 500 series Administration Manual page 297

Configuring IP Information
Domain Name Systems
STEP 1
STEP 2
STEP 3
Cisco 500 Series Stackable Managed Switch Administration Guide
Mapping DNS Hosts
The switch saves frequently-queried domain names acquired from the DNS
servers in a local DNS cache. The cache can hold up to 64 static entries, 64
dynamic entries, and one entry for each IP address configured on the switch by
DHCP. Name resolution always begins by checking static entries, continues by
checking the dynamic entries, and ends by sending requests to the external DNS
server.
Several IP addresses are supported per DNS per host name.
To add a domain name and its IP address:
Click IP Configuration > Domain Name System > Host Mapping. The Host
Mapping page opens.
This page displays the following fields:
• Host Name—User-defined domain name, up to 158 characters.
• IP Address—The host name IP address.
To add a host mapping, click Add. The Add Host Mapping page opens.
Enter the parameters.
• IP Version—Select Version 6 for IPv6 or Version 4 for IPv4.
• IPv6 Address Type—Select the IPv6 address type (if IPv6 is used). The
options are:
- Link Local—The IPv6 address uniquely identifies hosts on a single
network link. A link local address has a prefix of FE80, is not routable, and
can be used for communication only on the local network. Only one link
local address is supported. If a link local address exists on the interface,
this entry replaces the address in the configuration.
- Global—The IPv6 address is a global Unicast IPV6 type that is visible and
reachable from other networks.
• Link Local Interface—If the IPv6 address type is Link Local, select whether
it is received through VLAN2 or ISATAP.
• Host Name—Enter a domain name, up to 158 characters.
• IP Address—Enter an IPv4 address or enter up to four IPv6 host addresses.
Addresses 2–4 are backup addresses.
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