no ipv6 nd disable-reachable-timerThe following example shows how to disable the ND timer.Dell(conf-if-fo-1/1/1)#ipv6 nd disable-reachable-timerConfiguring IPv6 RA GuardThe IPv6 Router Advertisement (RA) guard allows you to block or reject the unwanted router advertisement guard messages that arrive atthe network device platform.To configure the IPv6 RA guard, perform the following steps:1 Configure the terminal to enter the Global Configuration mode.EXEC Privilege modeconfigure terminal2 Enable the IPv6 RA guard.CONFIGURATION modeipv6 nd ra-guard enable3 Create the policy.POLICY LIST CONFIGURATION modeipv6 nd ra-guard policy policy-name4 Define the role of the device attached to the port.POLICY LIST CONFIGURATION modedevice-role {host | router}Use the keyword host to set the device role as host.Use the keyword router to set the device role as router.5 Set the hop count limit.POLICY LIST CONFIGURATION modehop-limit {maximum | minimum limit}The hop limit range is from 0 to 254.6 Set the managed address configuration flag.POLICY LIST CONFIGURATION modemanaged-config-flag {on | off}7 Enable verification of the sender IPv6 address in inspected messages from the authorized device source access list.POLICY LIST CONFIGURATION modematch ra{ipv6-access-list name | ipv6-prefix-list name | mac-access-list name}8 Enable verification of the advertised other configuration parameter.POLICY LIST CONFIGURATION modeother-config-flag {on | off}9 Enable verification of the advertised default router preference value. The preference value must be less than or equal to the specifiedlimit.POLICY LIST CONFIGURATION moderouter-preference maximum {high | low | medium}468 IPv6 Routing
