Multiple Spanning Tree - Motorola WS5100 Series Reference Manual

4-114 WS5100 Series Switch System Reference Guide
The Unadopted AP
Index
MAC Address
Last Seen (In
Seconds)
Number of
Unadopted APs
3. Select an available index and click the
radio can be added for adoption to the switch. When displayed, the screen prompts for the MAC address
and type of radio. Complete the fields and click the
4. Click the Export
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

4.10 Multiple Spanning Tree

Multiple Spanning Tree (MST) protocol provides a VLAN-aware protocol and algorithm to create and
maintain a loop-free network. It allows the configuration of multiple spanning tree instances. This ensures
a loop-free topology for 1 or more VLANs. It allows the network administrator to provide a different path for
each group of VLANs to better utilize redundancy.
MST uses Rapid Spanning Tree (RST) protocol for rapid convergence. Since MST allows VLANs to be grouped
in an instance, each instance can have its own spanning-tree topology of other spanning-tree instances. This
architecture provides multiple forwarding links for data traffic, load balancing and therefore, reduces the
number of spanning-tree instances required to support a large number of VLANs.
Using MST, the network can be divided into regions. All switches within a region use the same VLAN to
utilize instance mapping. The entire network runs a spanning tree instance called the common spanning tree
instance (CST) that interconnects regions as well as legacy (STP and RSTP) bridges. The regions run on a local
instance for each configured MST instance.
The local spanning tree for instance 0 is known as Internal Spanning Tree (IST). The Common and Internal
Spanning Tree (CIST) (which consists of the CST as well as all ISTs across regions) interconnects all bridges
in the network. With the exception of provisions for multiple instances, MST operates exactly like RSTP.
tab displays the following information:
Displays a numerical identifier used to associate a particular access port with a
set of statistics and can help differentiate the access port from other access ports
with similar attributes.
Displays the unique Hardware or Media Access Control (MAC) address for the
access port. Access ports with dual radios will have a unique MAC address for
each radio. The MAC address is hard coded at the factory and cannot be modified.
Displays the time the access port was last seen (observed within the switch
managed network). This value is expressed in seconds. Use this value to assess if
the access port is no longer in communications with the switch.
Displays the total number of access ports (at the bottom of the screen) that have
been recognized, but not adopted by the switch.
Adopt
button to export the contents of the table to a Comma Separated Values file (CSV).
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.
button to display a screen wherein the properties of a new
OK button to add the radio.