D-Link DWS-1008 User Manual page 137
Wireless 8 port switch with poe
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Also See for DWS-1008:
- Cli reference manual (531 pages) ,
- Product manual (502 pages) ,
- Installation manual (17 pages)
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DWS-1008 User's Manual
subnet. If the AP is unable to locate an DWS-1008 on the subnet it is connected to,
the AP sends DNS requests to both TRPZ and wlan-switch, where the DNS suffix for
mynetwork.com is learned through DHCP.
• If only TRPZ is defined in DNS, the AP contacts the switch whose IP address is returned
for TRPZ.
• If only wlan-switch is defined in DNS, the AP contacts the switch whose IP address is
returned for wlan-switch.
• If both TRPZ and wlan-switch are defined in DNS, the AP contacts the switch
whose IP address is returned for TRPZ. The AP ignores the IP address returned for
wlan-switch.
• If both TRPZ and wlan-switch are defined in DNS, and the AP is unable to contact the
IP address returned for TRPZ, the AP never contacts the IP address returned for wlan-
switch. The AP does not boot.
Distributed APs and STP
A Distributed AP is a leaf device. You do not need to enable STP on the port that is directly
connected to the AP.
If Spanning Tree Protocol (STP) is enabled on the port that is directly connected to a Distributed
AP, you might need to change the STP configuration on the port, to allow the AP to boot.
Note: STP on a port directly connected to a Distributed AP can prevent the AP from
booting.
As part of the boot process, a DWL-8220AP disables and reenables the link on the port over
which the AP is attempting to boot. If STP is enabled on the device that is directly connected to
the port, the link state change can cause the port on the other device to leave the forwarding
state and stop forwarding traffic. The port remains unable to forward traffic for the duration of
the STP forwarding delay.
A DWL-8220AP waits 30 seconds to receive a reply to its DHCP Discover message, then tries
to boot using the other AP port. If the boot attempt fails on the other port also, the AP then
reattempts to boot on the first port. The process continues until a boot attempt is successful.
If STP prevents the other device's port from forwarding traffic during each boot attempt, the
AP repeatedly disables and reenables the link, causing STP to repeatedly stop the other
device's port from forwarding traffic. As a result, the boot attempt is never successful.
To allow a DWL-8220AP to boot over a link that has STP enabled, do one of the following
D-Link Systems, Inc.
Configuring DWL-8220AP Access Points
132
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