3com S7906E Installationsanweisungen

 

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[Sysname] interface vlan-interface 3 

[Sysname-Vlan-interface3] mad bfd enable 

[Sysname-Vlan-interface3] mad ip add 192.168.2.1 24 chassis 1 

[Sysname-Vlan-interface3] mad ip add 192.168.2.2 24 chassis 2 

[Sysname-Vlan-interface3] quit 

As shown in 

, the network is outgrowing the forwarding capability of the existing core switch, 

namely, Device A. To accommodate to business growth, the network must be scaled up to extend its 

forwarding capability while the present investments of the customer are protected. In addition, the ease 

of management and maintenance must be ensured. 

Figure 1-9 Network diagram for IRF (using LACP MAD detection) 

XGE1/3/0/25 
(IRF-port1/2)

XGE2/3/0/25 
(IRF-port2/1)

GE1/3/0/2

GE2/3/0/2

Device A

Device B

IRF link

...

Note: The solid orange line represents the IRF link; the solid magenta lines represent 

links used for LACP MAD detection; the solid black lines represent Ethernet links.

GE3/0/2

GE3/0/1

 

 

z 

Device A is located at the distribution layer of the network. To improve the forwarding capability at 

this layer, additional devices are needed. In this example, Device B is added. 

z 

To address the requirements for high availability, ease of management and maintenance, use IRF2 

technology to create an IRF with Device A and Device B at the distribution layer. The access 

devices are each connected to the distribution layer with dual links. 

z 

To offset the risk of IRF splits, configure MAD to detect multi-active IRF collisions. In this example, 

LACP MAD is adopted because the access devices connect to the uplink devices in the 

aggregation mode.