Cisco SR224T Administration Guide - Page 222

Configuring IP Information Domain Name Systems 16 - 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. • DNS Server IP Address-Enter the DNS server IP address. • Set DNS Server Active-Select to activate the new DNS server. STEP 6 Click Apply. The DNS server is written to the Running Configuration file. 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: STEP 1 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. STEP 2 To add a host mapping, click Add. The Add Host Mapping page opens. STEP 3 Enter the parameters. • IP Version-Select Version 6 for IPv6 or Version 4 for IPv4. Cisco Small Business 200 Series Smart Switch Administration Guide 223