Failure-Action - Juniper EX3400 Features Manual

DHCP and Other System Services Feature Guide for EX2300, EX3400, and EX4300 Switches

failure-action

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Description
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202
failure-action (clear-binding | clear-binding-if-interface-up | log-only);
[edit system services dhcp-local-server liveness-detection],
[edit system services dhcp-local-server dhcpv6 liveness-detection],
[edit forwarding-options dhcp-relay liveness-detection],
[edit forwarding-options dhcp-relay dhcpv6 liveness-detection],
[edit system services dhcp-local-server group group-name liveness-detection],
[edit system services dhcp-local-server dhcpv6 group group-name liveness-detection],
[edit forwarding-options dhcp-relay group group-name liveness-detection],
[edit forwarding-options dhcp-relay dhcpv6 group group-name liveness-detection]
Statement introduced in Junos OS Release 12.1.
Statement introduced in Junos OS Release 12.3R2 for EX Series switches.
Configure the action the router (or switch) takes when a liveness detection failure occurs.
Default:
clear-binding
clear-binding —The DHCP client session is cleared when a liveness detection failure occurs,
except when
maintain-subscribers interface-delete
clear-binding-if-interface-up
detection failure occurs and the local interface is detected as being up. Use this
setting to distinguish failures from between a liveness detection failure due to a local
network error, and a host disconnecting from the network. If the client binding is in
the maintain-binding Finite State Machine (FSM) state when the liveness detection
failure detection occurs, then the binding is not deleted.
log-only —A message is logged to indicate the event; no action is taken and DHCP is left
to manage the failure and maintain the client binding.
routing—To view this statement in the configuration.
routing-control—To add this statement to the configuration.
DHCP Liveness Detection Overview on page 95
Configuring Detection of DHCP Local Server Client Connectivity on page 96
Configuring Detection of DHCP Relay or DHCP Relay Proxy Client Connectivity on
page 98
Example: Configuring Group Liveness Detection for DHCP Local Server Clients
Example: Configuring Global Liveness Detection for DHCP Relay Agent Clients
—The DHCP client session is cleared only when a liveness
setting is configured and active.
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