Configuring the cluster 277/cfg/sys/dnsfollowed by:health Sets the interval for the Nortel SNAS to checkthe health of the DNS servers. At the specifiedinterval, the Nortel SNAS performs a DNSquery to each DNS server in the systemconfiguration to determine its health status.• interval is an integer that indicates thetime interval in seconds (s), minutes (m),hours (h), or days (d). If you do not specifya measurement unit, seconds is assumed.The default is 10 (10 seconds).hdown Sets the health check down counter.• count is a positive integer that indicatesthe number of times a DNS server healthcheck can time out before the Nortel SNASdetermines the DNS server is down. Thedefault is 2.hup Sets the health check up counter.• count is a positive integer that indicatesthe number of times a DNS server healthcheck returns a positive response beforethe Nortel SNAS determines the DNSserver is up. The default is 2.Managing DNS serversYou can add up to three DNS servers to the system configuration. TheDNS server is used by the captive portal when it forwards queries onthe Exclude List. (For more information about the captive portal and theExclude List, see “Captive portal and Exclude List” (page 228).)To configure the cluster to use external DNS servers, use the followingcommand:/cfg/sys/dns/serversThe DNS Servers menu appears.The DNS Servers menu includes the following options:Nortel Secure Network Access SwitchUsing the Command Line InterfaceNN47230-100 03.01 Standard28 July 2008Copyright © 2007, 2008 Nortel Networks.
