Steps We first exclude addresses that are already being used or reserved for another purpose.
All addresses and interface names/numbers used here are only used as examples. You can easily configure DHCP by following these steps. The Router will now respond with the information contained in the pool when it receives stateful DHCPv6 requests on this interface. The ipv6 dhcp server command binds the DHCPv6 pool to the interface. 
Setting the A flag to 0 tells the client not to use SLAAC to create a GUA.
#Router dhcp on star configuration with packet tracer windows#
The A flag can be left at 1, but some client operating systems such as Windows will create a GUA using SLAAC and get a GUA from the stateful DHCPv6 server.
The no ipv6 nd prefix default no-autoconfig command sets the A flag back to its default of 1. The A flag is manually changed from 1 to 0 using the interface command ipv6 nd prefix default no-autoconfig. For example, if you have an air-gapped network, where FDM cannot retrieve updates. You can use the no ipv6 nd managed-config-flag command to set the M flag back to its default of 0. Using DHCP relay on an interface, you can direct DHCP requests to a DHCP server that is accessible through the other interface. The M flag is manually changed from 0 to 1 using the interface command ipv6 nd managed-config-flag. The DHCPv6 pool has to be bound to the interface using the ipv6 dhcp server POOL-NAME interface config command. Router(config-if)# ipv6 dhcp server IPV6-STATEFUL Router(config-if)# ipv6 nd prefix default no-autoconfig Router(config-if)# ipv6 nd managed-config-flag Router(config-if)# ipv6 address fe80::1 link-local Router(config-if)# description Link to LAN Router(config)# interface GigabitEthernet0/0/1 To make a router into a DHCPv4 client (if you have a dynamic address from an ISP). We can use the following command to verify if the access list has blocked packets.Routershow access-lists Standard IP access list 1 10 deny host 192.168.1.1 (4 match(es)) 20 permit any.As seen in the command output, deny condition has blocked the traffic from the host, 4 matches are for those ping packets that were sent to the router. Configure the pool, default-router and network first. 
By default, the ip helper-address command forwards the following eight UDP services:Īssuming that we set up a DNS server with that domain name, this should work.
192.168.11.6 is the IP of the central DHCP server in the example.ĭHCPv4 is not the only service that the router can be configured to relay.This will cause R1 to relay DHCPv4 broadcasts to the DHCPv4 server. The interface for which the DHCP relay is being configured should be connected to the hosts, either directly or via a switch.Ī better solution is to configure R1 with the ip helper-address address interface configuration command.After configuring the Cisco Routers interface and the TCP/IP settings of the computers, click Switch and click the CLI tab in the window that opens. R1(config-if)# ip helper-address 192.168.11.6 First, add a Router, Switch, and six PCs to the Packet Tracer workspace to create a network topology as shown in the image below.
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