DNS facing problem while resolution

0:51:12.445296 IP 192.168.70.200 > 4.4.2.2 <http://4.4.2.2>: ICMP echo request, id 29515, seq 8, length 64 *Pls let us know for any further input on this issue.* BR// Sundram Bharti +919717977886 ___ Please visit https://lists.isc.org

Request to provide procedure for bind upgrade

Hi Team, My DNS current version is "BIND 9.8.4-P1" and OS is "Fedora Core release 6 (Zod)". So could you let me know. "_yum update named_" works for upgrade to current version, if yes then what will be the fall back procedure of upgrade fails? -- BR/