Dell S4048T, Configuration Manual

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• Configuration Tasks for ICMP
• Enabling ICMP Unreachable Messages
• UDP Helper
• Enabling UDP Helper
• Configuring a Broadcast Address
• Configurations Using UDP Helper
• UDP Helper with Broadcast-All Addresses
• UDP Helper with Subnet Broadcast Addresses
• UDP Helper with Configured Broadcast Addresses
• UDP Helper with No Configured Broadcast Addresses
• Troubleshooting UDP Helper
IP Addresses
Dell Networking OS supports IP version 4 (as described in RFC 791), classful routing, and variable length
subnet masks (VLSM).
With VLSM, you can configure one network with different masks. Supernetting, which increases the number
of subnets, is also supported. To subnet, you add a mask to the IP address to separate the network and host
portions of the IP address.
At its most basic level, an IP address is 32-bits composed of network and host portions and represented in
dotted decimal format. For example, 00001010110101100101011110000011 is represented as 10.214.87.131.
For more information about IP addressing, refer to RFC 791, Internet Protocol.
Implementation Information
You can configure any IP address as a static route except IP addresses already assigned to interfaces.
NOTE: Dell Networking OS supports 31-bit subnet masks (/31, or 255.255.255.254) as defined by RFC
3021. This feature allows you to save two more IP addresses on point-to-point links than 30-bit masks.
Dell Networking OS supports RFC 3021 with ARP.
NOTE: Even though Dell Networking OS listens to all ports, you can only use the ports starting from
35001 for IPv4 traffic. Ports starting from 0 to 35000 are reserved for internal use and you cannot use
them for IPv4 traffic.
Configuration Tasks for IP Addresses
The following describes the tasks associated with IP address configuration.
Configuration tasks for IP addresses includes:
• Assigning IP Addresses to an Interface (mandatory)
• Configuring Static Routes (optional)
IPv4 Routing 498