ISC port can be an individual port or a manual LACP trunk, but a dynamic LACP trunk can’t be configured as an ISC port.

Maximum of 8 links in a DT trunk across two switches is supported with a maximum of 4 links per DT switch

The current limitation of 60 manual trunks in a switch will now include DT manual trunks too.

One ISC is supported per switch for a maximum of 60 DT trunks supported in the switch.

Spanning Tree Protocol is disabled (i.e., PDUs are filtered) on DT ports.

An example of upstream traffic forwarding is as follows

Assuming the uplink connected to Switch B is blocked by STP and only an uplink in Switch A is active. Server 1 sent traffic with load-balance across its 802.3ad LACP links. If the receiving switch is Switch A, which learns the destination MAC from any of the upstream links, it will forward the unicast frames to destination directly via its upstream link. If Switch B receives the unicast frame from the server and it learns DA (destination address) MAC from Switch A, Switch B will forward the frames to Switch A, and in turn Switch A forwards the frames to the destination via its upstream link. Thus, unicast frames are always forwarded by only one of the DT switches.

Appendix K: Troubleshooting

LED status indicators for 5400zl series

The HP ProCurve Switch 5400zl series management module has various LED status indicators that are described in the following table.

LED

State

Indication

Power

On (green)

The switch is receiving power.

 

 

 

 

Off

The switch is NOT receiving power.

 

 

 

Fault

On (orange)

On briefly at the beginning of switch self-test after the switch is

 

 

powered on or reset. If on for a prolonged time, the switch has

 

 

encountered a fatal hardware failure, or has failed its self-test.

 

 

 

 

Off

The normal state; indicates there are no fault conditions on the

 

 

switch.

 

 

 

 

Blinking

A fault has occurred on the switch, one of the switch modules, an

 

(orange)

individual port, a power supply, or a fan. The Status LED for the

 

 

module or other device with the fault will flash simultaneously.

 

 

 

Test

On (green)

The switch self-test and initialization are in progress after you have

 

 

power cycled or reset the switch. The switch is not operational until

 

 

this LED goes off. The Self Test LED also comes on briefly when

 

 

you “hot swap” a module into the switch and the module is

 

 

automatically self-tested.

 

 

 

 

Off

Normal operation; the switch is not undergoing self-test.

 

 

 

 

Blinking

A component of the switch has failed its self-test. The status LED

 

(orange)

for that component (for example, a switch module) and the switch

 

 

Fault LED will flash simultaneously.

 

 

 

DIMM

On (green)

Normal operation.

 

 

 

 

Off

DIMM status is unknown.

 

 

 

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HP 3500yl, 5200zl manual Appendix K Troubleshooting, LED status indicators for 5400zl series