3com 5500-ei pwr Instrução De Instalação

 

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When configuring resilient ARP, go to these sections for information you are interested in: 

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Resilient ARP Configuration Example 

 

In expandable resilient networking (XRN) network application, normally you need to connect 

redundancy links between the fabric and other devices to support the resilient network. But if the 

connections inside the fabric break off, the fabric splits. In this case, the redundancy link may connect 

with two or more Layer 3 devices with the same configurations in the same network. Thus these devices 

operate the same routing function. Adopting the Resilient ARP function can avoid this. Resilient ARP 

can find whether there are the same Layer 3 devices in the network. If so, it keeps one device as the 

Layer 3 device, and changes the other devices to be the Layer 2 devices.  

The state machine of Resilient ARP has six states which are Initialize, LisentForL3Master, L3Master, 

L3slave, L2Master, and L2slave. L3Master sends Resilient ARP packets periodically to notify other 

fabrics that the local fabric is in the Layer 3 state.  

Resilient ARP implements the system state switching by sending/receiving Resilient ARP packets 

periodically, so as to determine a device to work as a Layer 3 device or a Layer 2 device.  

Resilient ARP configuration includes: 

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Enable/disable the Resilient ARP function. 

When Resilient ARP function is enabled, the system can deal with the devices according to the current 

state. When the connections inside a fabric break off, Resilient ARP can send Resilient ARP packets 

through the VLAN interface where the redundancy link resides, so as to determine a device to work as 

a Layer 3 device or as a Layer 2 device.  

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Configure the VLAN interface through which Resilient packets are sent.  

You can use the following commands to configure the VLAN interface through which Resilient packets 

are sent. When no VLAN interface is specified, Resilient packets are sent through the default VLAN 

interface.  

Follow these steps to configure the Resilient ARP function: 

Enter system view 

Enable the Resilient ARP 
function 

Required 

Enabled by default.