Dell MX5108n OS10 Enterprise Edition User Guide for PowerEdge MX IO Modules Re - Page 416

Set tracking delays, Object tracking, View tracked objects

Page 416 highlights

Reachability is DOWN 1 changes, Last change 2017-04-26T06:45:31Z OS10 (conf-track-2)# Configure IPv6 host tracking OS10 (conf-track-2)# track 3 OS10 (conf-track-3)# ipv6 20::20 reachability OS10 (conf-track-3)# delay up 20 OS10 (conf-track-3)# do show track 3 IP Host 20::20 reachability Reachability is DOWN 1 changes, Last change 2017-04-26T06:47:04Z OS10 (conf-track-3)# Set tracking delays You can configure an optional Up and/or Down timer for each tracked object. The timer allows you to set the time delay before a change in the state of a tracked object is communicated to clients. The time delay starts when the state changes from Up to Down or from Down to Up. If the state of an object changes back to its former Up or Down state before the timer expires, the timer is canceled without notifying the client. If the timer expires and an object's state has changed, a notification is sent to the client. For example, if the Down timer is running and an interface goes down then comes back up, the Down timer is canceled. The client is not notified of the event. If you do not configure a delay, a notification is sent when a change in the state of a tracked object is detected. The time delay in communicating a state change is specified in seconds. Object tracking As a client, VRRP can track up to 20 interface objects plus 12 tracked interfaces supported for each VRRP group. You can assign a unique priority-cost value from 1 to 254 to each tracked VRRP object or group interface. The priority cost is subtracted from the VRRP group priority if a tracked VRRP object is in a Down state. If a VRRP group router acts as owner-master, the run-time VRRP group priority remains fixed at 255. Changes in the state of a tracked object have no effect. In VRRP object tracking, the sum of the priority costs for all tracked objects and interfaces cannot equal or exceed the priority of the VRRP group. View tracked objects You can view the status of currently tracked Layer 2 or Layer 3 interfaces, or the IPv4 or IPv6 hosts. View brief object tracking information OS10# show track brief TrackID Resource Parameter Status LastChange 1 line-protocol ethernet1/1/1 DOWN 2017-02-03T08:41:25Z1 2 ipv4-reachablity 1.1.1.1 DOWN 2017-02-03T08:41:43Z1 3 ipv6-reachablity 10::10 DOWN 2017-02-03T08:41:55Z1 View all object tracking information OS10# show track 416 Layer 3

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Reachability is DOWN
1 changes, Last change 2017-04-26T06:45:31Z
OS10 (conf-track-2)#
Configure
IPv6 host tracking
OS10 (conf-track-2)# track 3
OS10 (conf-track-3)# ipv6 20::20 reachability
OS10 (conf-track-3)# delay up 20
OS10 (conf-track-3)# do show track 3
IP Host 20::20 reachability
Reachability is DOWN
1 changes, Last change 2017-04-26T06:47:04Z
OS10 (conf-track-3)#
Set tracking delays
You can
configure
an optional Up and/or Down timer for each tracked object. The timer allows you to set the time delay before a change in
the state of a tracked object is communicated to clients. The time delay starts when the state changes from Up to Down or from Down to
Up.
If the state of an object changes back to its former Up or Down state before the timer expires, the timer is canceled without notifying the
client. If the timer expires and an object’s state has changed, a
notification
is sent to the client. For example, if the Down timer is running
and an interface goes down then comes back up, the Down timer is canceled. The client is not
notified
of the event.
If you do not
configure
a delay, a
notification
is sent when a change in the state of a tracked object is detected. The time delay in
communicating a state change is
specified
in seconds.
Object tracking
As a client, VRRP can track up to 20 interface objects plus 12 tracked interfaces supported for each VRRP group. You can assign a unique
priority-cost value from 1 to 254 to each tracked VRRP object or group interface.
The priority cost is subtracted from the VRRP group priority if a tracked VRRP object is in a Down state. If a VRRP group router acts as
owner-master, the run-time VRRP group priority remains
fixed
at 255. Changes in the state of a tracked object have no
effect.
In VRRP object tracking, the sum of the priority costs for all tracked objects and interfaces cannot equal or exceed the priority of the
VRRP group.
View tracked objects
You can view the status of currently tracked Layer 2 or Layer 3 interfaces, or the IPv4 or IPv6 hosts.
View brief object tracking information
OS10# show track brief
TrackID
Resource
Parameter
Status
LastChange
---------------------------------------------------------------------------------
1
line-protocol
ethernet1/1/1
DOWN
2017-02-03T08:41:25Z1
2
ipv4-reachablity
1.1.1.1
DOWN
2017-02-03T08:41:43Z1
3
ipv6-reachablity
10::10
DOWN
2017-02-03T08:41:55Z1
View all object tracking information
OS10# show track
416
Layer 3