3Com WX2200 3CRWX220095A Switch User Manual

Similar to ports configured for directly connected MAPs, distributed
MAP configurations are numbered and can reference a particular
MAP. These numbered configurations do not, however, reference any
physical port.
Distributed MAP Network Requirements
Because Distributed MAPs are not directly attached to a WX, they require
additional support from the network in order to function. Information on
the booting and operation sequence for Distributed MAPs is covered in
the section “Boot Process for Distributed MAPs” on page 189.
Power — PoE must be provided on one of the Ethernet connections
to the MAP. Be sure to use a PoE injection device that has been tested
by 3Com. (Contact 3Com for information.)
DHCP — By default, a Distributed MAP uses TCP/IP for
communication, and relies on DHCP to obtain IP parameters.
Therefore, DHCP services must be available on the subnet that the
MAP is connected to. DHCP must provide the following parameters to
the MAP:
IP address
Domain name
DNS server address
Default router address
Static IP configuration—If DHCP is not available in the network, a
Distributed MAP can be configured with static IP information that
specifies its IP address, as well as the WX switch it uses as its boot
DNS — If the intermediate network between the WX switch and
Distributed MAP includes one or more IP routers, create a
3COMWX.mynetwork.com entry on the DNS server. The entry needs
to map this name to the system IP address of the switch. If the subnet
contains more than one WX in the same Mobility Domain, you can
use the system IP address of any of the WX switches. (For redundancy,
you can create more than one DNS entry, and map each entry to a
different WX switch in the subnet.)
The DNS entry allows the MAP to communicate with a WX that is not on
the MAP subnet. If the MAP is unable to locate a WX on the subnet, the
MAP sends DNS requests to 3COMWX, where the DNS suffix for
mynetwork.com is learned through DHCP.