Configuring Group-Specific Dhcp Local Server Options - Juniper EX3400 Features Manual

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Configuring Group-Specific DHCP Local Server Options

Copyright © 2017, Juniper Networks, Inc.
Two groups cannot share interface space. For example, the following configuration is
not allowed because the three stanzas share the same space and interfere with one
another—interface
ge-1/0/0.26
dhcp-relay group diamond interface ge-1/0/0.10 upto ge-1/0/0.30
dhcp-local-server group ruby interface ge-1/0/0.26
dhcp-relay group sapphire interface ge-1/0/0.25 upto ge-1/0/0.35
Two ranges cannot overlap, either within a group or across groups. Overlapping occurs
when two interface ranges share common subunit space but neither range is a proper
subset of the other. The following ranges overlap:
interface ge-1/0/0.10 upto ge-1/0/0.30
interface ge-1/0/0.20 upto ge-1/0/0.40
A range can contain multiple nested ranges. A nested range is a proper subset of
another range. When ranges are nested, the smallest matching range applies.
In the following example, the three ranges nest properly:
interface ge-1/0/0.10 upto ge-1/0/0.30
interface ge-1/0/0.12 upto ge-1/0/0.15 exclude
interface ge-1/0/0.25 upto ge-1/0/0.29 exclude
Discrete interfaces take precedence over ranges. In the following example, interface
takes precedence and enforces an interface client limit of
ge-1/0/0.20
interface ge-1/0/0.10 upto ge-1/0/0.30
interface ge-1/0/0.15 upto ge-1/0/0.25 exclude
interface ge-1/0/0.20 overrides interface-client-limit 5
Grouping Interfaces with Common DHCP Configurations on page 89
You can include the following statements at the
group group-name] hierarchy level to set group-specific DHCP local server configuration
options. Statements configured at the
hierarchy level apply only to the named group of interfaces, and override
group-name]
any global DHCP local server settings configured with the same statements at the
system services dhcp-local-server]
DHCPv6 local server supports the same set of statements with the exception of the
dynamic-profile statement.
—Configure the parameters the router sends to the external AAA server.
authentication
dynamic-profile —Specify the dynamic profile that is attached to a group of interfaces.
—Specify one or more interfaces, or a range of interfaces, that are within the
interface
specified group.
overrides —Override the default configuration settings for the extended DHCP local
server. For information, see
Settings" on page 28.
Chapter 6: Configuring Groups of DHCP Interfaces
is common to all three.
[edit system services dhcp-local-server
[edit system services dhcp-local-server group
hierarchy level.
"Overriding Default DHCP Local Server Configuration
.
5
[edit
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