Filter
Top Products
Known Problems 13
■ For the current firmware release, only the user “admin” can access the
Web interface.
■ When you choose “Reboot” from the Device View System/Control
folder, the following message appears: “
This operation will
simulate a power cycle on the system. Do you wish to
continue?
” If you click OK, the system begins to reboot, but the
message stays on the screen, and the browser stalls while waiting for
a response. The message remains on the screen even after the Switch
reboots. You therefore have to click the browser’s Refresh button.
Dual Speed Hub 500
■ Auto-negotiation sometimes fails when 10/100BASE-TX ports on the
Switch 4005 are connected to ports on the Dual Speed Hub 500
(DSH 500). When ports on this Switch are configured to
auto-negotiation and are then connected to ports on the DSH 500
which are fixed at 10 Mbps (half duplex), a link may sometimes be
slow to establish or may fail to establish. This problem is caused by the
DSH 500, and is currently under study.
100BASE-FX
(MT-RJ Module)
■ The Link LED on this module (3C16829) has now been changed from
single color (green) to dual color LED (green and amber) as indicated
on Page 53 in the Switch 4005 Installation and Maintenance Guide.
1000BASE-T Module
■ The Link LED on the 2-port module (3C16841) may stay illuminated
for several seconds after the network cable is removed, and the Mode
LED flashes yellow as if receiving or transmitting packets.
CoS Propagation
■ If the egress port for a frame is tagged, then the 802.1 VLAN tag of
the egress frame will contain the CoS value of the frame at the ingress
port.
■ An untagged frame is assigned a default CoS priority of 0 at ingress.
In other words, if an untagged packet enters an interface module and
the VLAN settings modify the packet to become a tagged packet, the
module can insert VLAN information but cannot set a priority level
other than 0.
A restriction at the chip level regarding untagged frames at the ingress
port (entering the module) is that the chip's internal mapping table
will translate the original eight (8) input CoS values into four (4)
output CoS values based on one of the original input CoS values.