jueves, 7 de noviembre de 2013

Mejores practicas configuraciones Cisco - Standby delay minimum reload not configured

Standby delay minimum reload not configured





ExcepciónStandby delay minimum reload not configured
CategoriaIP Applications
Tipo OSIOS
Riesgomedio
Descripción"When configuring HSRP, Cisco recommens using the 'standby delay minimum|reload' command to prevent blackholing of traffic. This allows time for all ports in the VLAN to come up after a reload or module reset. In a subsecond timer scenario, hellos could be lost with CPU busy after reload.
Recomendación"If the active router fails or is removed from the network, then the standby router will automatically become the new active router. If the former active router comes back online, you can control whether it takes over as the active router by using the standby preempt command.

However, in some cases, even if the standby preempt command is not configured, the former active router will resume the active role after it reloads and comes back online. Use the standby delay minimum reload command to set a delay period for HSRP group initialization. This command allows time for the packets to get through before the router resumes the active role.

We recommend that all HSRP routers have the standby delay minimum reload configured with a minimum delay time of 30 seconds and a minimum reload time of 60 seconds.

The delay will be cancelled if an HSRP packet is received on an interface.

The standby delay minimum reload interface configuration command delays HSRP groups from initializing for the specified time after the interface comes up. "
Referencia URLStandby Delay Minimum Reload
Acción correctiva Under the interface mode, configure
Router(config)# interface ethernet x/y
Router(config-if)# standby delay minimum 30 reload 60





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