
Configuring DHCP Relay
Configuring SNMP Support
98
Ruckus Wireless, Inc.
Configuring DHCP Relay
ZoneDirector’s DHCP Relay agent improves network performance by converting
DHCP broadcast traffic to unicast to prevent flooding the Layer 2 network (when
Layer 3 Tunnel Mode is enabled -- DHCP Relay only applies to Tunnel Mode WLANs.)
Typically, when mobile stations acquire IP addresses through DHCP, the DHCP
request and acknowledgment traffic is broadcast to any devices in the same Layer
2 environment. With Tunnel Mode WLANs, this traffic flood is wasteful in terms of
bandwidth and computing power.
When DHCP Relay is enabled on a WLAN, the ZoneDirector relay agent converts
DHCP Discover / Request traffic to unicast UDP packets and sends them to the
DHCP servers, then delivers DHCP Offer / Ack messages from the DHCP server
back to the client.
The traffic flow is as follows:
1
Client sends DHCP discover broadcast.
2
AP tunnels this DHCP discover frame to ZoneDirector.
3
DHCP Relay Agent sends unicast DHCP discover packet to DHCP server.
4
DHCP server sends DHCP offer to Relay Agent on ZoneDirector.
5
ZoneDirector sends DHCP Offer back to the AP.
6
AP sends this Offer to client.
By reducing broadcast flooding, this option allows for higher client capacity in
tunneled WLANs designed for VoIP phones, for example. It also allows for DHCP
discovery across multiple subnets and limits DHCP broadcasts to client’s AP tunnel
and radio.
To configure DHCP Relay for tunneled WLANs:
1
Go to
Configure > DHCP Relay
.
2
Click
Create New
.
3
Enter a
Name
and
IP address
for the server.
4
Click
OK
to save your changes. The new server appears in the list.
Содержание ZoneDirector 3000
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Страница 147: ...Controlling Network Access Permissions Blocking Client Devices ZoneDirector 9 8 User Guide 800 70599 001 Rev B 147...
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Страница 364: ...Best Practices and Recommendations Recovering an Isolated Mesh AP 364 Ruckus Wireless Inc...
Страница 388: ...Support Entitlement Upgrading the License with Smart Redundancy 388 Ruckus Wireless Inc...
Страница 410: ...Restarting ZoneDirector Streaming Mode 410 Ruckus Wireless Inc...
Страница 420: ...Best Practice Checklist Elevation of RAPs and MAPs 420 Ruckus Wireless Inc...
Страница 428: ...428 Ruckus Wireless Inc band selection 236 255 ZoneFlex APs upgrading software 368...
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