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Configuration Guide - IP Service

S7700 and S9700 V200R013C00

This document describes the configurations of IP service, including IP address, ARP, DHCP, DNS, mDNS gateway, mDNS relay, UDP Helper, IP performance optimization, IPv6, DHCPv6, IPv6 DNS, IPv6 over IPv4 tunnel and IPv4 over IPv6 tunnel.
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Licensing Requirements and Limitations for DHCP

Licensing Requirements and Limitations for DHCP

Involved Network Elements

Other network elements are not required.

Licensing Requirements

DHCP is a basic feature of a switch and is not under license control.

Version Requirements

Table 3-5  Products and versions supporting DHCP

Product

Product Model

Software Version

S7700

S7703, S7706, and S7712

V100R003C01, V100R006C00, V200R001(C00&C01), V200R002C00, V200R003C00, V200R005C00, V200R006C00, V200R007C00, V200R008C00, V200R009C00, V200R010C00, V200R011C10, V200R012C00, V200R013C00

S7703 PoE

V200R013C00

S7706 PoE

V200R013C00

S9700

S9703, S9706, and S9712

V200R001(C00&C01), V200R002C00, V200R003C00, V200R005C00, V200R006C00, V200R007(C00&C10), V200R008C00, V200R009C00, V200R010C00, V200R011C10, V200R012C00, V200R013C00

NOTE:
For details about software mappings, visit Hardware Query Tool and search for the desired product model.

Feature Limitations

Table 3-6 lists DHCP specifications.

Table 3-6  DHCP specifications
Function Description Specifications
DHCP server Maximum number of IP addresses that can be allocated by the switch 131072
Maximum number of IP address pools that can be configured on the switch 256 (including global and interface address pools). The number of address pools of each type is not limited.
Maximum number of egress gateway addresses that can be configured in the global address pool view 8
Maximum number of DNS server or NetBIOS server IP addresses configured in an address pool 8
Maximum number of IP addresses in each address pool
  • Interface address pool: 65536
  • Global address pool: 65536
Maximum number of fixed IP addresses that can be allocated to specified clients 4096
Number of customized options in each address pool 8
DHCP relay Maximum number of DHCP server groups that can be configured on the switch 64
Maximum number of DHCP servers in a DHCP server group 20
Maximum number of DHCP server groups that can be applied to an interface 1
Maximum number of DHCP server addresses that can be configured on an interface 20
DHCP client/BOOTP client Maximum number of IP addresses that a DHCP client or BOOTP client can apply for (each interface can only apply for one IP address)

32

Wireless interfaces cannot function as DHCP clients or BOOTP clients.

The DHCP relay function can be configured on the VLANIF interface of a super-VLAN on the switch in any version, and the DHCP server function can be configured on the VLANIF interface of a Super-VLAN on the switch in V100R006 or a later version.

The DHCP relay function can be configured on a sub-interface on the switch in V100R006 or a later version. The DHCP server function can be configured on a sub-interface on a switch in V200R005 or a later version.

The switch in V100R006 or a later version supports gateway failover when working as a DHCP relay agent.

In V100R003 or a later version, VRRP can be configured on a switch working as a DHCP relay agent. It is necessary to specify the virtual IP address of the VRRP group as the gateway of DHCP clients, and add the virtual IP address to a DHCP server group.

In V100R006 or a later version, VRRP can be configured on a switch working as a DHCP server. The master device in the VRRP group assigns IP addresses to DHCP clients. Information about the address pool on the master DHCP server cannot be backed up to the backup DHCP server in real time. To prevent IP address conflicts after a master/backup switchover, the address pool ranges on the master and backup DHCP servers must be mutually exclusive.

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Updated: 2019-04-20

Document ID: EDOC1100065743

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