HP A7510 User Manual (English)

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Setting the IRF link down report delay

You can avoid link flapping causing frequent IRF splits and merges during a short time by configuring the

IRF ports to delay reporting link down events. An IRF port thus works as follows:

• If the IRF link changes from up to down, the port does not immediately report the change to the IRF

fabric. If the IRF link state is still down when the delay time is reached, the port reports the change

to the IRF fabric.

• If the IRF link changes from down to up, the link layer immediately reports the event to the IRF fabric.

Follow these steps to set the IRF link down report delay:

To do… Use the command…

Remarks

Enter system view system-view —

Set the IRF link down report delay irf link-delay interval

Optional

The function is disabled by default.

The recommended value range (in

milliseconds) is 200 to 500. The greater the

interval, the slower the service recovery.

Configuring MAD detection

You have the following MAD mechanisms for detecting multi-active collisions in different network

scenarios:

• LACP MAD

• BFD MAD

These MAD detection mechanisms operate independently, and you can configure all of them for an IRF

fabric.

Configuring LACP MAD

1. LACP MAD detection mechanism

With LACP MAD, an IRF member switch sends extended LACP data units (LACPDUs) with a type length

value (TLV) that conveys the domain ID and active ID of the IRF fabric for detecting an IRF split. The

domain ID uniquely identifies an IRF fabric in the network, and the active ID is identical to the member

ID of the master switch in the IRF fabric.

An IRF member switch compares the domain ID and the active ID in each received extended LACPDU

with its domain ID and active ID:

• If the domain IDs are different, the extended LACPDU is from a different IRF fabric, and the switch

does not continue to process the extended LACPDU with the MAD mechanism.

• If the domain IDs are the same, the switch compares the active IDs:

{ If the active IDs are different, the IRF fabric has split.

{ If the active IDs are the same, the IRF fabric is operating normally.

2. Network requirements

Every IRF member switch has a link with an intermediate switch, and all these links form a dynamic link

aggregation group, as shown in Figure 10.

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HP A7510 Specifications

General

Product Series	A7500
Product Model	A7510
Jumbo Frame Support	Yes
Manageable	Yes
SFP Slots	Variable, based on modules
SFP+ Slots	Variable, based on modules
Power Supply	Dual hot-swappable power supplies
Switch Type	Modular
Dimensions (W x D x H)	44.2 x 48 x 44.2 cm (17.4 x 18.9 x 17.4 in)