Dell Force10 MXL Blade - Configuration Tasks; Configure the System to be a DHCP Server; Implementation Information

162 | Dynamic Host Configuration Protocol (DHCP)
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Implementation Information
• The Dell Force10 implementation of DHCP is based on RFC 2131 and RFC 3046.
• IP source address validation is a sub-feature of DHCP snooping; FTOS uses ACLs internally to
implement this feature and as such, you cannot apply ACLs to an interface which has IP source address
validation. If you configure IP source address validation on a member port of a VLAN, and then
attempt to apply a access list to the VLAN, FTOS displays the first line in Message 1. If you first apply
an ACL to a VLAN, and then attempt enable IP source address validation an one of its member ports,
FTOS displays the second line in Message 1.
• FTOS provides 40K entries that you can divide between leased addresses and excluded addresses. By
extension, the maximum number of pools you can configure depends on the on the subnet mask that
you give to each pool. FTOS displays an error message for configurations that exceed the allocated
memory.
• Supports 4K DHCP snooping entries.
• Supports DAI on 16 VLANs per system.
Configuration Tasks
• Configure the System to be a DHCP Server
• Configure the System to be a Relay Agent
• Configure Secure DHCP
Configure the System to be a DHCP Server
A DHCP server is a network device that has been programmed to provide network configuration
parameters to clients upon request. Servers typically serve many clients, making host management much
more organized and efficient.
The key responsibilities of DHCP servers are:
1. Address storage and management: DHCP servers are the owners of the addresses used by DHCP
clients. The server stores the addresses and manages their use, keeping track of which addresses have
been allocated and which are still available.
2. Configuration parameter storage and management: DHCP servers also store and maintain other
parameters that are sent to clients when requested. These parameters specify in detail how a client is to
operate.
Message 1 DHCP Snooping with VLAN ACL Compatibility Error
% Error: Vlan member has access-list configured.
% Error: Vlan has an access-list configured.