Installation guide

AT-S25 Management Software Release Notes
613-50514-00 Rev A 13 Allied Telesyn, Inc.
Operational Notes
❑ Xmodem download can be performed either from the diagnostic prompt or the run
time menu. Do not use Xmodem from the run time menu if the console port is set to
115,200 baud.
❑ When handling 64-byte packets exclusively, the ports on the Gigabit module can
experience a packet loss of 0.1% at 1% line rate, and may increase to 3+% at 100% line
rate. In normal network operation, a loss of any other packet size, other than 64-byte,
drops to 0% in a mixed packet size environment.
❑ When building a network with L2 protocol-based redundancy, ATI recommends the use
of Rapid Spanning Tree protocol over the Spanning Tree protocol. Rapid Spanning Tree
protocol is a standard-based protocol drafted by the IEEE standard organization and
very often referred to as the "802.1w". RSTP adoption rate has been rapid and proven to
be a much more robust protocol.
Rapid Spanning Tree protocol has a number of technical advantages highlighted
below:
- Fast network re-convergence - in the range of 2 - 10 sec depending on the
network topology, compared to 30 - 60 sec for STP.
- Compatibility mode with the previous Spanning Tree protocol, called
"Forced Spanning Tree".
- Can simultaneously run with 802.1Q tagged VLAN on any uplink ports
❑ The atiStackSwitch.mib file has been implemented in this release. The atiL2.mib and
FSTSwitch.mib files are not applicable with this version of software.
❑ This version of the management software does not support adding static multicast
addresses. The management interface only displays the multicast addresses. These
multicast addresses mainly come from IGMP Snooping.
❑ A new switching mode called Basic mode has been added to the management software.
When this mode is activated, tagged packet as well as untagged packets are forwarded
base on a packet's destination MAC address only. The VLAN tag within tagged frames is
ignored. For further information on this new feature, refer to the
AT-S25 Management Software User's Guide.