Users Guide

• If the scaled metric for a route is greater than or equal to the DOWN threshold or the route is not
entered in the routing table, the state of a route is DOWN.
Congure the UP and DOWN thresholds for each tracked route with the threshold metric command.
The default UP threshold is 254; the default DOWN threshold is 255. The notication of a change in the
state of a tracked object is sent when a metric value crosses a congured threshold.
The tracking process uses a protocol-specic resolution value to convert the actual metric in the routing
table to a scaled metric in the range 0 to 255. You can congure the resolution value used to scale route
metrics for supported protocols with the track resolution ip route and track resolution
ipv6 route
commands.
track interface ip routing
Congure object tracking on the routing status of an IPv4 Layer 3 interface.
Syntax
track object-id interface interface ip routing
To return to the default setting, use the no track object-id command.
Parameters
object-id Enter the ID number of the tracked object. The range is 1 to 500.
interface Enter one of the following values:
• For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet then the slot/port information.
• For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the
slot/port information.
•
For a Loopback interface, enter the keyword loopback then a number from 0
to 16383.
• For a port channel interface, enter the keywords port-channel then a
number.
• For a tunnel interface, enter the keyword tunnel.
• For a VLAN interface, enter the keyword vlan then a number from 1 to 4094.
Defaults none
Command Modes CONFIGURATION
Command History
Version Description
9.7(0.0) Introduced on the M I/O Aggregator. Added support for tunnel interface.
Usage Information Use this command to create an object that tracks the routing state of an IPv4 Layer 2 interface:
• The status of the IPv4 interface is UP only if the Layer 2 status of the interface is UP and the interface
has a valid IP address.
• The Layer 3 status of an IPv4 interface goes DOWN when its Layer 2 status goes down (for a Layer 3
VLAN, all VLAN ports must be down) or the IP address is removed from the routing table.
track interface line-protocol
Congure object tracking on the line-protocol state of a Layer 2 interface.
Syntax
track object-id interface interface line-protocol
Object Tracking
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