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Troubleshooting
Table I-2: Troubleshooting: Configuring
Problem Possible Cause Possible Solution
After connecting more
than one port to another
switch or destination
device, the port activity
LEDs continuously
indicate activity.
Since there are multiple links across
this device and the destination device,
they form loops, which cause
broadcast storms.
From the Configure Spanning Tree settings
screen, enable STP at switch level. From the
Port Spanning Tree settings screen, enable
STP at port level, if you want multiple links.
Make sure that the Bypass setting is disabled.
This will avoid loops and maintain standby
links for resilience in case the primary links go
down.
While configuring VLANs,
you cannot enable a port
in multiple VLANs.
A port can be part of only one VLAN
unless the port is a tagged port.
Make sure that your VLANs are 802.1Q
VLANs and enable the port as a tagged port
from the 802.1Q Static VLAN Settings
screen on console interface, or the VLAN
settings screen on Web-based interface.
After assigning a port to
multiple 802.1Q VLANs by
configuring it as tagged
port, you check the PVID.
It is equal to the first
VLAN ID.
For port-based VLANs, ports belong
to only one VLAN and only one PVID
can be assigned. Port-based VLANs
can be extended to other switches by
cross connecting ports that have the
same PVID (the same Port based
VLAN).
By default, all the ports have PVID 1. The
switch assigns to the port a PVID that is equal
to the VLAN ID of the first VLAN that the port
was enabled in. To manually configure a Port
VLAN, refer to “Configuring a Port VLAN” in
the management interface reference guides.
Changing the first
XConnect port settings
changes the next
XConnect port settings.
But changes to the second
XConnect port settings
cannot be applied or
saved.
By default, XConnect ports are
bundled into a port trunk.
Since they are bundled into a trunk, the
settings of the first port are referenced and
applied to the reset of the ports. So in a trunk,
only the first port (reference port) is
configurable and defines the characteristics of
the other ports in the trunk.
While assigning the ports
to VLANs, the interconnect
switch does not let the
user enable two adjacent
ports into two different
VLANs.
The ports could be two adjacent ports
that are bundled in a port trunk.
Two ports that are assigned to a port trunk
cannot be assigned to two different VLANs.
Either break the trunk to assign it two different
VLANs or assign the ports to one VLAN.
After forcing the speed,
duplex, and flow control on
the port, the link does not
come up and transfer data
properly.
Both sides need to be forced to the
same settings. In case of auto-
negotiation, both sides will negotiate
and match the setting to make the
correct link.
• From the Configure Ports screen, make
sure the ports are forced to the same
setting as the setting on the other end of
the link.
• Use a crossover cable in case of forced
10/100 speeds.
I-6 HP ProLiant BL e-Class C-GbE Interconnect Switch User Guide
HP CONFIDENTIAL Codename: DeLorean Part Number: 263682-002 Last Saved On: 2/5/03 10:54 AM