Multiple Spanning Tree - Motorola RFS7000 Series System Reference Manual

4-120 Network Setup
MAC Address
Last Seen (In Seconds) Displays the time the access port was last seen (observed within
Number of Unadopted
APs
3. Select an available index and click the
new 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 button to export the contents of the table to a Comma Separated Values file (CSV).
CAUTION An access port is required to have a DHCP provided IP address before
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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.
The following definitions describe the STP instances that define an MST configuration:
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.
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
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 port has to get DNS server information as part of its DHCP
information. The default DNS name requested by an AP300 is
"Symbol-WISPE-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
OK button to add the radio.