User's Manual

Table Of Contents
496
Users Manual of CS-6306R
hosts on an IEEE 802 LAN configured with a default gateway IP address. HSRP routes IP traffic without
relying on the availability of any single router. It enables a set of router interfaces to work together to present
the appearance of a single virtual router or default gateway to the hosts on a LAN. When HSRP is configured
on a network or segment, it provides a virtual Media Access Control (MAC) address and an IP address that is
shared among a group of configured routers. HSRP allows two or more HSRP-configured routers to use the
MAC address and IP network address of a virtual router.The virtual router does not exist; it represents the
common target for routers that are configured to provide backup to each other. One of the routers is selected
to be the active router and another to be the standby router, which assumes control of the group MAC address
and IP address should the designated active router fail.
HSRP detects when the designated active router fails, and a selected standby router assumes control of the
Hot Standby group’s MAC and IP addresses. A new standby router is also selected at that time.Devices
running HSRP send and receive multicast UDP-based hello packets to detect router failure and to designate
active and standby routers. When HSRP is configured on an interface, Internet Control Message Protocol
(ICMP) redirect messages are disabled by default for the interface.
HSRP can be configured in Ethernet/Fast Ethernet/VLAN network without supporting token ringtoken bus,
FDDI and ATM LAN network.
49.2.2 HSRP protocol Configuration tast list
Enabling HSRP Protocol
Configuring HSRP Group Property
49.2.3 HSRP protocol Configuration tast
49.2.3.1 Enabling HSRP Protocol
To enable hsrp protocol in interface, you should configure the below command in interface configure model :
Command Purpose
standby [group-number] ip
[ip-address [secondary]]
Enable hsrp protocol
49.2.3.2 Configuring HSRP Group Property
To configure HSRP group property you should configure one or more command list below in interface
configure model:
Command Purpose
standby [group-number]
timershellotime holdtime
Configure HSRP timer parameter.
standby [group-number]
mac-addressmac-address
Configure HSRP group virtual mac
address.
standby [group-number]
prioritypriority
Configure hsrp priority level.(To vote in
active/standby router)