Motorola WS5100 Series Reference Manual page 23

AP Balancing Across Multiple Switches
At adoption, the AP solicits and receives multiple adoption responses from the switches on the network.
These adoption responses contain preference and loading information the AP uses to select the optimum
switch to be adopted by. Use this mechanism to define which APs are adopted by which switches. By default,
the adoption algorithm generally distributes AP adoption evenly among the switches available.
NOTE: Each WS5100 can support a maximum of 48 access ports. However, port adoption
per switch is determined by the number of licenses acquired.
CAUTION: An access port is required to have a DHCP provided IP address before
attempting layer 3 adoption, otherwise it will not work. Additionally, the access port must
be able to find the IP addresses of the switches on the network.
To locate switch IP addresses on the network:
• Configure DHCP option 189 to specify each switch IP address.
• Configure a DNS Server to resolve an existing name into the IP of the switch. The access
In a layer 3 environment, the access port adoption process is somewhat unique, for more information, see
Configuring Layer 3 Access Port Adoption on page
1.2.2.11 Wireless Roaming
The following types of wireless roaming are supported by the switch:
• L3 Roaming
• Fast Roaming
• Interswitch Layer 2 Roaming
• International Roaming
• MU Move Command
• Virtual AP
L3 Roaming
L3 roaming works with switches in the mobility domain to exchange mobility related control information. This
includes IP addresses, Media Access Control (MAC) address information and the HS-VLAN-id of all MUs in
the mobility-domain. A consistent peer configuration results in full-mesh sessions required for L3 roaming to
work correctly. Peering sessions use Transmission Control Protocol (TCP) as the transport layer protocol to
carry mobility update messages. TCP provides the following advantages:
• TCP retransmits lost messages thereby providing reliable connectivity
• TCP ensures ordered message delivery using sequenced numbers.
• TCP has a built-in "keep-alive" mechanism which helps detect loss of connectivity to the peer or peer
failure.
In a layer 3 environment, the access port adoption process is somewhat unique, for more information, see
Configuring Layer 3 Access Port Adoption on page
port has to get DNS server information as part of its DHCP information. The default DNS
name requested by an AP300 is "Symbol-CAPWAP-Address". However, since the default
name is configurable, it can be set as a factory default to whatever value is needed.
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Overview