Calix AXOS - E7 Layer 2 DHCP Profile via SMX

Background

You need to adjust the DHCP profile in SMX to prevent customers from getting too many IPs if they plug in a switch to the ONT or plug a gateway in backwards functionally switching home devices in the subscriber VLAN. This page was pulled from the SMX manual on 10-5-21.

Creating a Layer 2 DHCP Profile

This topic describes how to create a Layer 2 DHCP profile, and is organized as follows:

Overview | Configuration guidelines | Procedures | Parameters

Overview

You can assign a Layer 2 DHCP profile under an L2 VLAN to enable L2 DHCP Snoop for v4.

Configuration guidelines

Relationship to other profiles and objects:
- ID profile > Layer 2 DHCP profile > Layer 2 VLAN > subscriber port
DHCP leases > 30 minutes are stored to flash memory for recovery after a system power cycle or reboot.
Note: DHCP leases < 30 minutes will not be recovered after a power cycle or reboot. Since clients refresh their leases at the lease half time, this gives a worst-case scenario of 15 minutes for recovery after a power cycle or reboot.

Procedures

To create a L2 DHCP profile (via SMx)

From the menu bar, click Profiles.
In the Quick Links menu, click Common > L2 DHCP Proxy Profile.
In the DHCP Profile page, click Create.
In the Create DHCP Profile panel, do the following:
1. Reference the table above to provision the parameters.
2. Click Submit to save your profile.

To create a L2 DHCP profile (via CLI)

In the CLI configuration mode, enter the starting point command "l2-dhcp-profile" and enter a unique name for the L2 DHCP profile.
l2-dhcp-profile <name>
Reference the table below to configure other parameters as required.

Parameters

You can provision the following parameters to create a L2 DHCP profile:

CLI Parameter

SMx Parameter

Description

l2-dhcp-profile <profile-name>

Name

A unique name for the L2 DHCP profile, consisting of a string of up to 48 characters, including letters, numbers, and special characters:
_ (underscore), - (hyphen), . (dot)

id-name

ID Profile

Name of a previously configured ID profile to apply to the L2 DHCP profile.

lease-limit

JSI Recommends set this to 1

Lease Limit

Maximum number of DHCP clients allowed, per interface.

Valid values:

0–256; (default =16, 0 = unlimited)

lock

Lock

Prevent lease movement across interfaces.

Valid values:

ENABLED
DISABLED (default)

single-lease-overwrite

JSI Recommends setting this to enabled if the lease-limit is set to 1

Single Lease Overwrite

When the lease-limit is 1, allow a new host's lease to replace the current lease on an interface.

Valid values:

ENABLED
DISABLED (default)

stag-pcp

Overwrites the priority (PCP) bits in the DHCP packet.