Cisco IE 4000, Software Configuration Manual

Page: 775 / 1066

-771
Cisco Industrial Ethernet 4000 Series Switch Software Configuration Guide
Chapter Configuring HSRP and VRRP
Configuring HSRP
HSRP Configuration Guidelines
Follow these guidelines when configuring HSRP:
• HSRP for IPv4 and HSRP for IPv6 are mutually exclusive. You cannot enable both at the same time.
•
HSRPv2 and HSRPv1 are mutually exclusive. HSRPv2 is not interoperable with HSRPv1 on an
interface and the reverse.
• You can configure up to 32 instances of HSRP groups.
If you configure the same HSRP group number on multiple interfaces, the switch counts each
interface as one instance:
For example, if you configure HSRP group 0 on VLAN 1 and on port 1, the switch counts this as
two instances.
•
In the configuration procedures, the specified interface must be a Layer 3 interface:
– 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 created 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.
•
All Layer 3 interfaces must have assigned IP addresses.
• Configure only one instance of an FHRP. The switches support HSRPv1, HSRPv2, and HSRP for
IPv6.
•
The version of an HSRP group can be changed from HSRPv2 to HSRPv1 only if the group number
is less than 256.
• When configuring group numbers for HSRPv2 and HSRP for IPv6, you must use group numbers in
ranges that are multiples of 256. Valid ranges are 0 to 255, 256 to 511, 512 to 767, 3840 to 4095,
and so on.
Examples of valid and invalid group numbers:
– If you configure groups with the numbers 2, 150, and 225, you cannot configure another group
with the number 3850. It is not in the range of 0 to 255.
Standby group number 0
Standby MAC address System assigned as: 0000.0c07.acXX, where XX is the HSRP
group number
Standby priority 100
Standby delay 0 (no delay)
Standby track interface priority 10
Standby hello time 3 seconds
Standby holdtime 10 seconds
Table 47-62 Default HSRP Configuration
Feature Default Setting