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Catalyst 3750 SwitchSoftware Configuration Guide
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Chapter44 Configuring Enhanced Object Trackin g
Configuring Enhanced Object Tracking Features
Configuring Static Routing Support
Switches that are running the IP services image with Cisco IOS release 12.2(46)SE or later support
enhanced object tracking static routing. Static routing support using enhanced object tracking provides
the ability for the switch to use ICMP pings to identify when a preconfigured static route or a DHCP
route goes down. When tracking is enabled, the system tracks the state of the route and informs the client
when that state changes. Static route object tracking uses Cisco IP SLAs to generate ICMP pings to
monitor the state of the connection to the primary gateway.
•For more information about Cisco IP SLAs support on the switch, see Chapter43, “Configuring
Cisco IOS IP SLAs Operations.”
•For more information about static route object tracking:
http://www.cisco.com/en/US/docs/ios/12_3/12_3x/12_3xe/feature/guide/dbackupx.html
You use this process to configure static route object tracking:
Step1 Configure a primary interface for static routing or for DHCP.
Step2 Configure an IP SLAs agent to ping an IP address using a primary interface and a track object to monitor
the state of the agent.
Step3 Configure a default static default route using a secondary interface. This route is used only if the primary
route is removed.

Configuring a Primary Interface

Beginning in privileged EXEC mode, follow these steps to configure a primary interface for static
routing:
Beginning in privileged EXEC mode, follow these steps to configure a primary interface for DHCP:
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Select a primary or secondary interface and enter interface
configuration mode.
Step3 description string Add a description to the interface.
Step4 ip address ip-address mask [secondary] Set the primary or secondary IP address for the interface.
Step5 exit Return to global configuration mode.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Select a primary or secondary interface and enter interface
configuration mode.
Step3 description string Add a description to the interface.
Step4 ip dhcp client route track number Configure the DCHP client to associate any added routes with the
specified track number. Valid numbers are from 1 to 500.