Dell PowerConnect FCS624S Configuration Guide - Page 393

Metro Ring Protocol (MRP) 10 Configures this node as the master node for the ring. Enter this command only on one node in the ring. The node is a member (non-master) node by default. Syntax: [no] ring-interface ethernet ethernet The ethernet parameter specifies the primary interface. On the master node, the primary interface is the one that originates RHPs. Ring control traffic and Layer 2 data traffic will flow in the outward direction from this interface by default. On member nodes, the direction of traffic flow depends on the traffic direction selected by the master node. Therefore, on a member node, the order in which you enter the interfaces does not matter. The ethernet parameter specifies the secondary interface. NOTE To take advantage of every interface in a Metro network, you can configure another MRP ring and either configure a different Master node for the ring or reverse the configuration of the primary and secondary interfaces on the Master node. Configuring multiple rings enables you to use all the ports in the ring. The same port can forward traffic one ring while blocking traffic for another ring. Syntax: [no] enable The enable command enables the ring. Changing the hello and preforwarding times You also can change the RHP hello time and preforwarding time. To do so, enter commands such as the following. PowerConnect(config-vlan-2-mrp-1)#hello-time 200 PowerConnect(config-vlan-2-mrp-1)#preforwarding-time 400 These commands change the hello time to 200 ms and change the preforwarding time to 400 ms. Syntax: [no] hello-time Syntax: [no] preforwarding-time The specifies the number of milliseconds. For the hello time, you can specify from 100 - 1000 (one second). The default hello time is 100 ms. The preforwarding time can be from 200 - 5000 ms, but must be at least twice the value of the hello time and must be a multiple of the hello time. The default preforwarding time is 300 ms. A change to the hello time or preforwarding time takes effect as soon as you enter the command. Configuration notes • The preforwarding time must be at least twice the value of the hello time and must be a multiple of the hello time. • If UDLD is also enabled on the device, Dell recommends that you set the MRP preforwarding time slightly higher than the default of 300 ms; for example, to 400 or 500 ms. • You can use MRP ring diagnostics to determine whether you need to change the hello time and preforwarding time. Refer to "Using MRP diagnostics". PowerConnect B-Series FCX Configuration Guide 351 53-1002266-01