Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.14.1.0 - Page 307
Con the System for User Port Stacking (Option 230), Configuring DHCP relay source interface,
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Configure the System for User Port Stacking (Option 230) Set the stacking-option variable to provide stack-port detail on the DHCP server when you set the DHCP offer. A stack can be formed when the units are connected. Option 230 is the option for user port stacking. Use it to create up to eight stack groups. Define the configuration parameters on the DHCP server for each chassis based on the chassis MAC address. Configure the following parameters: • unit number • priority • stack group ID The received stacking configuration is always applied on the master stack unit. option #230 "unit-number:3#priority:2#stack-group:14" Configuring DHCP relay source interface The following section explains how to configure global and interface level DHCP relay source IPv4 or IPv6 configuration to forward all the DHCP packets from the DHCP client to DHCP server through the configured source interface. This feature is applicable only for L3 interface with relay configuration and L3 DHCP snooping enabled VLANs. Global DHCP relay source IPv4 or IPv6 configuration You can configure global DHCP relay source IPv4 or IPv6 configuration using the command {ip | ipv6} dhcp-relay sourceinterface interface command in the CONFIGURATION mode. DHCP relay uses the IPv4 or IPv6 global source address of the configured interface for relaying packets to the DHCP server. For example, if you configure DHCP relay source interface as a loopback interface, the DHCP relay uses the configured loopback interface to forward the packets to the DHCP server using the configured IPv4 or IPv6 address. The source interface can be a VLAN, LAG, physical and loopback interfaces. • Specify the type of an interface and interface-number that should be used as a DHCP relay source interface. CONFIGURATION mode {ip | ipv6} dhcp relay source-interface interface Example configuration of global DHCP relay source IPv4 or IPv6 interface Following is the sample configuration to configure loopback interface with IPv4 and IPv6 address in CONFIGURATION MODE. Dell(conf)# interface loopback 1 Dell(conf-if-lo-1)# ip vrf forwarding vrf1 Dell(conf-if-lo-1)# ip address 1.1.1.1/32 Dell(conf-if-lo-1)# ipv6 address 1::1/128 Dell(conf-if-lo-1)# no shutdown To configure the loopback interface as IPv4 or IPv6 DHCP relay source interface, enter the following commands in the CONFIGURATION MODE. Dell(conf)# ip dhcp relay source-interface loopback 1 Dell(conf)# ipv6 dhcp relay source-interface loopback 1 When you configure the above commands in the CONFIGURATION MODE, it will configure the loopback interface as the DHCP relay source interface for forwarding the DHCP packets from DHCP client to server. When this command is configured in the CONFIGURATION Dynamic Host Configuration Protocol (DHCP) 307
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