Connectivity - Juniper EX3400 Features Manual

DHCP and Other System Services Feature Guide for EX2300, EX3400, and EX4300 Switches
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Configuring Detection of DHCP Relay or DHCP Relay Proxy Client Connectivity
98
For DHCP global configuration:
[edit system services dhcp-local-server liveness-detection]
user@host# edit failure-action
For DHCP group configuration:
[edit system services dhcp-local-server group group-name liveness-detection]
user@host# edit failure-action
DHCP Liveness Detection Overview on page 95
Extended DHCP Local Server Overview on page 22
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
Liveness detection for DHCP subscriber IP or DHCP client IP sessions utilizes an active
liveness detection protocol to institute liveness detection checks for relevant clients.
Clients must respond to liveness detection requests within a specified amount of time.
If the responses are not received within that time for a given number of consecutive
attempts, then the liveness detection check fails and a failure action is implemented.
To configure liveness detection for DHCP relay:
Specify that you want to configure liveness detection.
1.
For DHCP global configuration:
[edit forwarding-options dhcp-relay]
user@host# edit liveness-detection
For DHCP group configuration:
[edit forwarding-options dhcp-relay group group-name]
user@host# edit liveness-detection
NOTE: Liveness detection is also supported for DHCPv6 configurations.
To configure DHCPv6 liveness detection, include the
statement, and any subsequent configuration statements, at the
forwarding-options dhcp-relay dhcpv6]
dhcpv6 group group-name
(Optional) Specify that you want to use DHCP relay proxy mode.
2.
[edit forwarding-options dhcp-relay group group-name]
user@host# set overrides proxy-mode
action
action
or
[edit forwarding-options dhcp-relay
hierarchy level.
Copyright © 2017, Juniper Networks, Inc.
liveness-detection
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