
Revision 1.3a
Page 84
XLR 550 Manual
SECTION 5
XLR 550 VLANS and Quality of Service
5.1.
XLR 550 VLANS
The XLR 550 supports three IEEE 802.1Q VLAN operation modes:
Normal.
In normal mode, maximum 256 VLANs can be added and deleted
Trunk
In trunk mode, the ports operate like trunk port of a Cisco switch. Each port is able to set to have
multiple VLANs (range from 1 to 4095).
Transparent.
In transparent mode, the device operates like transparent bridge. Both untagged and tagged
frames are transferred transparently.
5.1.1.
Simple LAN Extension
Overview
This function enables 2 LAN segments to simply connect to each other at Layer 2. Thus, all
kinds of protocols (TCP/IP, IPv6, IPX, NETBEUI etc) which use Ethernet Frame can be passed
over the link as well as passing various tagged VLAN frames in each direction
Figure 5.1
Network Diagram
e1
e0
e1
e0
s0
s0
Device #1
Device #2
5.1.2.
Configuration for XLR 500 Series
XLR 500 Series basically supports a Transparent Bridge. The application shown in diagram 5.1
depicts the XLR 500 being used to provide a basic LAN extension.
5.1.3.
Configuration for XLR 550 Series
There is a ‘Transparent Mode’ in the XLR 550 Series. If transparent mode is configured by utilising the
‘vlmode’ command, then both the untagged frames and tagged frames are transmitted to in each direction (Full
Duplex)