Specifications

(MTU) on these Access Points to 1500 bytes. Do this by entering (from
enable mode) under the AP location:
ap location 0.0.0 mtu 1500
write memory
 Aruba only supports directly connecting Aruba Mobility Controllers with a
cross-over cable. Connecting Aruba Mobility Controllers with straight-through
cables is not recommended. Using the proper (cross-over) cable, ports on
both sides of the connection can be configured to auto-negotiate or can be
hard coded as long as they match.
 If after upgrading from ArubaOS 2.0.x to 2.4.1.0, you notice that some
Ethernet ports fail to come up, check the port setting. It is likely these ports
are configured as 100/10 half or full duplex when they should be set to auto-
negotiate. (The port configuration mechanism for 2.4.1.0 differs from that in
2.0.x which may cause occasional port misconfigurations.)
 Devices that are idle for extended periods of time (for example, overnight)
but which need to maintain their connection to an Aruba switch, must be able
to respond to ICMP requests from the Aruba switch. However, the default
settings of many personal firewalls, (including XP SP2), deny incoming ICMP
requests. This configuration results in the devices experiencing frequent
disconnects and reconnects, as well as DHCP address problems. To
eliminate connection problems, be sure to configure firewall settings to allow
ICMP requests from the Aruba switch.
 Many personal firewalls and ad/pop-up blocker programs, (for example
Google and Yahoo) block pop-up windows by default. This can cause
Captive Portal logon/logout issues if the switch URL does not explicitly allow
pop ups. To prevent this problem, allow pop ups for the switch’s URL.
To log-out from a Captive Portal session if the pop-up window is not
available, point your web browser to:
http://<switch ip address>/auth/logout.html
 In deployments with the Aruba dialer and RSA SecurID, new/next pin mode
RSA token time syncing support requires that the Aruba dialer be added into
the firewall's application exception list. (For more information on configuring a
firewall application exception list, refer to the Microsoft knowledge base, as
this is typical for Microsoft applications.) This step is not required for normal
operations.
 The Microsoft XP SP2 personal firewall already allows L2TP whereas Sygate
needs this to be configured manually.
 RF Plan is a view-only application in MAC OS.
 User entries showing wrong Location and Roaming Status may occur after a
failover and recovery. The HA shows the correct information but the FA may
not. (6858)
ArubaOS 2.4.1.0 Part 0500116-01 4
Release Notes June 2005