Cambium Networks cnMatrix EX2028 Handleiding (320 Pagina's)

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L3 Features 169

L3 Features

DHCP Relay

Managing DHCP Relay

Feature Description

DHCP Relay agent allows the DHCP client and DHCP server in different subnets to communicate with

each other so that the DHCP client can obtain its IP address and configuration. The relay agent receives

packets from the Client, inserts information such as network details, and forwards the modified packets

to the Server. The Server identifies the Client’s network from the received packets, allocates the IP

address accordingly, and sends a reply to the Relay. The Relay strips the information inserted by the

Server and broadcasts the packets to the Client’s network.

Standards

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RFC 3046

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RFC 2131

Scaling Numbers

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Maximum of 200 clients can use this feature simultaneously.

Limitations

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The cnMatrix switch cannot be a DHCP Relay and Server simultaneously.

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When enabled, the DHCP Relay feature is active on all VLANs/networks.

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DHCP Snooping and DHCP Relay are mutuallyexclusive.

Default Values

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The DHCP Relay feature, and also option 82 are disabled by default.

Prerequisites

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Enable IP routing globally.

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Create VLANs and assign ports to VLANs.

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Assign IP addresses to the VLANs.

Attention

Even thoughthe feature can be enabled on a VLAN or port, it will relay packets from all

VLANs.

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