Troubleshooting

Table G-2: Troubleshooting: Configuring

Problem

Possible Cause

Possible Solution

After connecting more

Because there are multiple links

From the Configure Spanning Tree settings

than one port to another

across this device and the destination

screen, enable STP at switch level. From the

switch or destination

device, they form loops, which cause

Port Spanning Tree settings screen, enable

device, the port activity

broadcast storms.

STP at port level if you want multiple links.

LEDs continuously

 

Make sure that the Bypass setting is disabled.

indicate activity.

 

This setting prevents loops and maintains

 

 

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 the console interface or from the VLAN settings screen on the Web-based interface.

After assigning a port to multiple 802.1Q VLANs by configuring it as a 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 Chapter 3 (console management interface) and “Configuring the Port VLAN ID” in Chapter 4 (Web-based management interface).

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 Multilink Trunk.

Because they are bundled in to a trunk, the settings of the first port are referenced and applied to the rest 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 GbE 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 Multilink Trunk.

Two ports that are assigned to a Multilink 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.

While configuring SLIP settings, you cannot apply the setting after making the local IP address the same as the GbE Interconnect Switch IP address.

Local IP addresses cannot be same as the GbE Interconnect Switch IP address. Local IP addresses should be a different IP address from the same subnet range.

Make sure that the SLIP local IP address is not configured to be same as the GbE Interconnect Switch IP address. Make sure that it is from the same subnet range so that SLIP can function properly.

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 that the ports are forced to the same setting as the setting on the other end of the link.

G-6

Compaq ProLiant BL p-Class GbE Interconnect Switch User Guide