Alcatel-Lucent 6850-48 Guida Di Rete

DHCP Relay Specifications

Configuring DHCP Relay

page 31-2

OmniSwitch AOS Release 6 Network Configuration Guide

RFCs Supported

0951–Bootstrap Protocol
1534–Interoperation between DHCP and BOOTP
1541–Dynamic Host Configuration Protocol
1542–Clarifications and Extensions for the Bootstrap Protocol
2132–DHCP Options and BOOTP Vendor Extensions
3046–DHCP Relay Agent Information Option, 2001

Platforms Supported

OmniSwitch 6400, 6800, 6850, 6855, and 9000

DHCP Relay Implementation

Global DHCP
Per-VLAN DHCP
AVLAN DHCP

DHCP Relay Service

BOOTP/DHCP (Bootstrap Protocol/Dynamic Host Configuration 
Protocol)

UDP Port Numbers

67 for Request
68 for Response

IP address allocation 
mechanisms

Automatic–DHCP assigns a permanent IP address to a host.
Dynamic–DHCP assigns an IP address to a host for a limited period of 
time (or until the host explicitly relinquishes the address).
Manual–The network administrator assigns a host’s IP address and the 
DHCP conveys the address assigned by the host. 

IP addresses supported for each 
Relay Service

Maximum of 256 IP addresses for each Relay Service.

IP addresses supported for the
Per-VLAN service

Maximum of 8 IP addresses for each VLAN relay service.
Maximum of 256 VLAN relay services.

Maximum number of UDP relay 
services allowed per switch

32

Maximum number of VLANs to 
which forwarded UDP service 
port traffic is allowed

256

Maximum number of DHCP 
Snooping VLANs

64

Maximum number of clients per 
switching ASIC when IP source 
filtering is enabled.

125