Motorola 2.1 Networking Setup Manual page 26

Chapter 2: Network Setup
3. The DHCP server observes that the request originates from the 10.24.0.0/16 network. It answers
this request with a 10.24.X.X/16 IP address.
configured on the DHCP server running on the One Point Wireless Manager
4. The 3750 switch receives this reply and forwards it out back on VLAN 24 to the IAP.
Figure 2-5
3 3
Wireless Manager Wireless Manager
172.31.0.20 172.31.0.20
In our next example
In the next example an 802.11 client has associated to a virtual access point on our IAP. The DHCP
exchange is as follows:
1. The client sends a DHCP request.
2. The IAP tags this request with VLAN 49 and forwards it to the 3750 switch.
3. The 3750 switch receives the DHCP request on Port 18 which is also configured to accept
packets on VLAN 49. VLAN 49 is configured on the switch to forward DHCP requests to the One
Point Wireless Manager
One Point Wireless Manager
untagged VLAN 31, the tag is removed and the DHCP request is forwarded out port 1 to the One
Point Wireless Manager
VLAN Example 1
1 1 2 2
1X 1X
SYST SYST
RPS RPS
MASTR MASTR
STAT STAT
DUPLX DUPLX
SPEED SPEED
STACK STACK
2X 2X
MODE MODE
™
server via the configured IP helper address 172.31.0.20. Since the
™
server is connected to port 1, and ports 1-4 are a part of
™
server.
Please recall that this DHCP pool has been
Layer 3 Switch Layer 3 Switch
2 2
VLAN 24 10.24.0.1 VLAN 24 10.24.0.1
IP helper address 172.31.0.20 IP helper address 172.31.0.20
3 3 4 4 5 5 6 6 7 7 8 8 9 10 9 10 11 12 11 12 13 14 13 14 15 16 15 16 17 18 17 18
11X 11X 13X 13X
12X 12X 14X 14X
4 4
1 1
IAP IAP
2-12
™
server.
Catalyst 3750 Catalyst 3750 SERIES SERIES
19 20 19 20 21 22 21 22 23 24 23 24
23X 23X
1 1 2 2
24X 24X
Management Management
VLAN 24 VLAN 24