User's Manual

Table Of Contents
An indicative description of the function of each block:
Frame
An incoming frame contains the destination MAC address DA and the source address SA. The VLAN
802.1p priority can be contained in the Ethernet header and the DSCP priority in the IP header. If the
frame is a member of a VLAN, it carries it's VID number and 802.1q priority in the tag.
VLAN
A frame is received through ports Eth1, Eth2, Air or from microwave CPU. The head of the frame may
change at this time based on parameters set in the VLAN menu.
All untagged frames are assigned a VID. A tagged (VLAN) framework can have its own VID overwritten
by a default VID.
The packet priority can be ovewritten according to parameter menus QoS, VLAN and ATU.
The FID for searching in the ATU table is allocated to the frame within the VLAN menu (by the input
port) or from the corresponding VID in the VTU table.
Member parameter can limit the allowed output direction of ports.
Frames sent from a unit transfers through an output port. The Egress mode parameter bound to the
port either adds or removes the VLAN tag.
VTU
Values in the VID determine search results from the VTU table. These are created manually. The SID
index (enabled ports in terms of STP) FID index (for searching in the address table ATU) taken from
this search result are assigned to the frame. This FID will overwrite the FID from menu VLAN.
Based on this, the VTU can also overwrite the priority of this frame.
The permitted output ports and method of working with VLAN tag on the output are also defined here.
STU
The Spanning tree protocol in this table maintains the status of ports from the viewpoint of the authorized
network throughput and the learning of routing. Protocol MSTP is used.
Each VTU entry uses some of the entries in the STU. Entries in the ATU are created in accordance
with these assigned states.
The port state behaviour is determined by the STP.
ATU settings
Any assigned parameters dictate how the ATU table should be used.
The Global section of this menu provides for passage of MGMT frames (e.g. BPDU).
In the Port settings section, the behaviour of individual port is defined:
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