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Cisco ME 3400 EthernetAccess Switch SoftwareConfiguration Guide
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Chapter33 Configuring HSRP Configuring HSRP
HSRP Configuration Guidelines
Follow these guidelines when configuring HSRP:
•HSRP can be configured on a maximum of 32 VLAN or routing in te rface s.
•In the procedures, the specified interface must be one of these Layer 3 interfaces:
–
Routed port: a physical port configured as a Layer 3 port by entering the no switchport
interface configuration command.
–
SVI: a VLAN interface created by using the interface vlan vlan_id global configuration
command and by default a Layer 3 interface.
–
Etherchannel port channel in Layer 3 mode: a port-channel logical interface crea ted by using
the interface port-channel port-channel-number global configuration command and binding
the Ethernet interface into the channel group. For more information, see the “Configuring
Layer 3 EtherChannels” section on page 31-13.
•All Layer 3 interfaces must have IP addresses assigned to them. See the “Configuring Layer 3
Interfaces” section on page9-20.
Enabling HSRP
The standby ip interface configuration command activates HSRP on the configured interface. If an IP
address is specified, that address is used as the designated addres s for t he H ot St andby g rou p. If n o I P
address is specified, the address is learned through the standby function. You must configure at least one
routing port on the cable with the designated address. Configuring an IP address always overrides
another designated address currently in use.
When the standby ip command is enabled on an interface and proxy ARP is enabled, if the interface’s
Hot Standby state is active, proxy ARP requests are answered using the Hot Standby group MAC
address. If the interface is in a different state, proxy ARP respon ses are su ppresse d.
Beginning in privileged EXEC mode, follow these steps to create or enable HSRP on a Layer 3 interface:
Standby delay 0 (no delay)
Standby track interface priority 10
Standby hello time 3 seconds
Standby holdtime 10 seconds
Table33-1 Default HSRP Configuration (continued)
Feature Default Setting
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Enter interface configuration mode, and enter the Layer 3 interface on
which you want to enable HSRP.
Step3 no shutdown Enable the port, if necessary. By default, user network interfaces (UNIs)
are disabled, and network node interfaces (NNIs) are enabled.