New answers tagged dhcp
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Thanks to Ron for the help and understanding as we worked through this problem. Because ip arp inspection must be tied to a specific port we are unable to do this. Changing our IP Addresses on our clients to DHCP and extending the DHCP lease to a longer period of time a allows us to keep ip dhcp snooping running on all user VLANs and keep ip arp inspection ...
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It should be a mostly transparent process to the relay agent. The agent gets the broadcast client request, adds it's relay information, and unicasts it on to the server(s). The server uses the relay information to return any message through the agent, who then broadcasts an answer back to the client. The client won't have an address at this point, so it has ...
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As you note, gateways can be statically configured. You can have a default gateway (gateway of last resort to 0.0.0.0/0) and/or gateways for more specific networks (prefixes longer than 0). A gateway is the host on a network that is used to reach other networks.
An IPv4 host can receive a default gateway from the DHCP (Dynamic Host Configuration Protocol) ...
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You need to assign an IP address to the VLAN 100 SVI to be the gateway address. DHCP will automatically assign DHCP on an addressed interface from the correct pool based on the interface address. You also need to have the gateway address in the pool. You probably want to define a DNS server in the DHCP pool, too.
ip dhcp pool guest-0100
network 10.10.100.0 ...
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IF the device has a reservation, you should enable DHCP so it gets the correct address from the server.
If you can't enable DHCP on the device, you can create a static binding in the snooping database:
ip dhcp snooping binding 0000.1111.2222 vlan 70 192.0.2.1 interface gi 1/0/1
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