EWB100 Usage and Deployment Guide
Rev 1.13
Page 40
7 IP Stack
7.1
Basic Functionality
This section describes the functionality of the TCP/IP stack within the EWB100.
The EWB supports only IPv4.
The EWB supports three mechanisms for obtaining IP addressing
informa
tion: Static, “MAC”, and DHCP. The factory default is “MAC” in
which the lower 24 bits of the IP address is taken from the lower 24 bits
the MAC address. The upper 8 bits of the IP address with MAC mode is
192. The means to obtain the IP addressing information may be changed
by a configuration command (including all IP parameters if Static IP
addressing is used).
The device only performs a DHCP on initial startup and when the address
lifetime is reached. It does not, by default, do a DHCP on a roam. This
may be changed by a configuration command to use a DHCP “renewal”.
This lack of a DCHP exchange on a roam may be confusing to some
infrastructure products.
The device will not generally roam across subnets since it does not
perform a DHCP request sequence on roams. In such a situation the
device will continue to use the IP address from the original subnet which
will not be acceptable on the new subnet. Some infrastructure products
permit a device to keep its IP address even when roaming onto a different
subnet. The EWB will work with infrastructures so configured. This
configuration may be complex so the default recommendation is to deploy
in a single subnet environment.
The device supports ICMP and has a “Ping” utililty available from the CLI
The device supports both IGMP V2 and V3 but IGMP is disabled by
default. If enabled, the interval between IGMP packets is 240 seconds but
may be changed if desired.
7.2
Configuration Commands
These commands configure the TCP/IP stack on the EWB100 device. There are
three modes for the stack: DHCP, Static, and MAC.
7.2.1 Network Mode
This command specifies how the TCP/IP stack will acquire an IP address. The
format is:
Summary of Contents for TEAM Badge (EWB100)
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