2: Introduction to VLAN
Configuring VLAN and CDP on a GW Series Router
Issue 1.4
Page 7 of 12
© 2012 Virtual Access.
Figure 4: The VLAN information page showing Ethernet VLAN mapping
Alternatively, you can use a Telnet session to issue the following command:
Show Ethernet vmap
VLAN Tag Logical If
-------- ----------
0 Eth-0
100 Eth-1
200 Eth-2
300 Eth-3
Port Neg S100 Fulldpx Loopbk Pwrdown Isolate Quality Loop?
---- ---
---- ------- ------ ------- ------- ------- -----
A 1 0 0 0 0 0 0 No
B 1 0 0 0 0 0 0 No
C 1 0 0 0 0 0 0 No
D 1
0 0 0 0 0 0 No
Table 3: Screen grab showing results of the show Ethernet vmap command
2.4
Deployment scenario example
The use of VLANs in a VoIP scenario is very important. You can use VLANs to optimise
QoS control and to reduce the number of Ethernet cables used.
You can tag Voice traffic from the LAN to allow the router to apply the appropriate QoS
settings.
When PCs and IP phones exist on separate VLANs, you can use a single Ethernet cable to
daisy chain the PC from the back of the IP phone to reduce cable runs or the number of
Ethernet ports used.
