H3C S5120-EI Series Configuration Manual

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H3C S5120-EI Series Configuration Manual Manual pdf 30 page image

22• Use dynamic link aggregation mode. MAD is LACP dependent. Even though LACP MAD can beconfigured on both static and dynamic aggregate interfaces, it takes effect only on dynamicaggregate interfaces.• Configure link aggregation settings also on the intermediate device.To configure LACP MAD:Step Command Remarks1. Enter system view. system-view N/A2. Assign a domain ID to the IRFfabric. irf domain domain-id The default IRF domain ID is 0.3. Create an aggregateinterface and enteraggregate interface view.interface bridge-aggregationinterface-numberUse either command.Perform this step also on theintermediate device.4. Configure the aggregationgroup to operate in dynamicaggregation mode.link-aggregation mode dynamicBy default, an aggregationgroup operates in staticaggregation mode.Perform this step also on theintermediate device.5. Enable LACP MAD. mad enable By default, LACP MAD isdisabled.6. Return to system view. quit N/A7. Enter Ethernet interface view. interface interface-typeinterface-number N/A8. Assign the Ethernet interfaceto the specified aggregationgroup.port link-aggregation group number Perform this step on theintermediate device as well.Configuring ARP MADWhen you configure ARP MAD, follow these guidelines:• Use a VLAN dedicated to ARP MAD.• If an intermediate device is used, you can use common data links as ARP MAD links. If nointermediate device is used, set up dedicated ARP MAD links between IRF member devices.• If an intermediate device is used, make sure the following requirements are met:{ Run the spanning tree feature between the IRF fabric and the intermediate device.{ Enable the IRF fabric to change its bridge MAC address as soon as the master leaves.{ Create an ARP MAD VLAN and assign the ports on the ARP MAD links to the VLAN.{ If the intermediate device is in an IRF fabric, assign this fabric a different domain ID than theARP MAD-enabled fabric to avoid false detection of IRF splits.