Configuring Interfaces For Uplink Failure Detection (Cli Procedure) - Juniper EX9200 Features Manual

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Configuring Interfaces for Uplink Failure Detection (CLI Procedure)

Copyright © 2016, Juniper Networks, Inc.
A link-to-disable interface—The link-to-disable interfaces specify the downlink
interfaces the switch disables when the switch detects an uplink failure. You can
configure a maximum of 48 downlink interfaces as link-to-disable in a group.
The link-to-disable interfaces are bound to the link-to-monitor interfaces within the
group. When a link-to-monitor interface returns to service, the switch automatically
enables all link-to-disable interfaces in the group.
Configuring Interfaces for Uplink Failure Detection (CLI Procedure) on page 35
You can configure uplink failure detection on EX Series switches to help ensure balanced
traffic flow. Using this feature, switches can monitor and detect link failure on uplink
interfaces and can propagate the failure to downlink interfaces so that servers connected
to those downlink interfaces can switch over to secondary interfaces.
Follow these configuration guidelines:
You can configure a maximum of 48 groups for each switch.
You can configure a maximum of 48 uplink interfaces and 48 downlink interfaces in
each group.
You can configure physical links and logical links in separate groups.
Ensure that all the interfaces in the group are up. If the interfaces are down, uplink
failure detection does not work.
NOTE: Routed VLAN interfaces (RVIs) cannot be configured as uplink
interfaces to be monitored.
To configure uplink failure detection on a switch:
Specify a name for the group:
1.
[edit protocols]
user@switch# set uplink-failure-detection
Add an uplink interface to the group:
2.
[edit protocols]
user@switch# set uplink-failure-detection group
Repeat Step 2 for adding each uplink interface to the group.
3.
NOTE: An interface can be configured as link-to-monitor in multiple groups.
Add a downlink interface to the group:
4.
[edit protocols]
user@switch# set uplink-failure-detection group
Repeat Step 4 for adding each downlink interface to the group.
5.
Chapter 3: Configuring Uplink Failure Detection
group group-name
group-name link-to-monitor
group-name link-to-disable
interface-name
interface-name
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