Chapter 2: Network Setup
Figure 2-4
VLAN Examples
In order to better understand how VLANs are used in our small system reference design let's examine
how traffic traverses these VLANs. In the example below the One Point Wireless Manager
connected to port 1 and our IAP is connected to port 18. Management VLAN 24 has been configured on
our IAP as well as DHCP. When the IAP is powered on it obtains an IP address in the follow steps:
1. The IAP requests an IP address via DHCP. This request is sent over VLAN 24.
2. The 3750 switch receives the DHCP request on Port 18 which is configured to accept packets on
VLAN 24. VLAN 24 is configured on the L3 switch to forward DHCP requests to the One Point
Wireless Manager
Point Wireless Manager server
VLAN 31, the tag is removed and the DHCP request is forwarded out port 1 to the One Point
Wireless Manager
L3 Switch for MOTOMESH Duo 2.1 - VLAN View
1X
SYST
RPS
MASTR
STAT
DUPLX
SPEED
STACK
2X
MODE
™
server via the configured IP helper address 172.31.0.20. Since the One
™
is connected to port 1, and ports 1-4 are a part of untagged
™
server.
2
4
6
8
9 10
11 12
13 14
15 16
1
3
5
7
11X
13X
12X
14X
2-11
Catalyst 3750
SERIES
17 18
19 20
21 22
23 24
23X
1
2
24X
™
server is