Cisco 4510R - Catalyst Switch Manual de usuario descargar pdf (Pagina 19)

3 WS−X4448−GB−RJ45 120 72

4 WS−X4148−RJ45V 60 50

Note: If the power supply is not powered−up, the status might be reported as bad. The syslog indicates that

the power supply has failed. Make sure that the power supply is actually powered−up before you troubleshoot

the failed power supply.

Note: Refer to the Power Management section of the product documentation for more information about

power redundancy.

HSRP

HSRP provides network redundancy for IP networks with a virtual gateway for hosts in the subnets. HSRP is

enabled on two routing devices in a subnet. The routing devices provide a single virtual IP address that can be

used as a default gateway IP address on hosts in the subnet. The routing devices elect an active and standby

router between them and the active router performs packet forwarding from that subnet. When the active

HSRP router fails, the standby becomes the active router and continues the gateway services with the same IP

address. No change in host gateway configuration is required.

Catalyst 4500 Supervisor IV supports HSRP and M−HSRP. HSRP should be configured between the 4500

Supervisor on two different chassis, as shown in this diagram.

4500 Supervisors can also form HSRP with another external switch or router, as shown in this diagram. The

supervisor cannot form HSRP within the same chassis because the standby supervisor is in suspended mode.

Supervisor IV supports up to 256 HSRP group IDs in the range of 0−255.

The HSRP configuration is similar to IOS routers. Refer to Hot Standby Router Protocol Features and

Functionality and Understanding and Troubleshooting HSRP Problems in Catalyst Switch Networks for more

information.

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Cisco 4510R - Catalyst Switch Manual de usuario Pagina 19