Support for Router. 1. Support a) Bidder support should be comprehensive on-site 24 X 7 X 365. b) The bidder by themselves should ensure that all critical/security patches/ upgrades / updates etc. are applied, as and when released by the OEM. c) Preventive maintenance i. The bidder to carry out preventive maintenance every half year and submit the PM report to bank officials. ii. Preventive maintenance activity should take care of physical verification, device configuration verification, device health checkup, fine-tuning the configuration, security checkup, verification of bugs/patches, up-gradation of firmware/operating system to the latest version (if available from OEM) etc. 5.4.