D-Link DES-3828 Product Manual - Page 292

xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch CLI Manual config stp Restrictions the designated router in RSTP, thus stating that the Switch is still functioning. A time between 1 and 10 seconds may be chosen, with a default setting of 2 seconds. In MSTP, the spanning tree is configured by port and therefore, the hellotime must be set using the configure stp ports command for switches utilizing the Multiple Spanning Tree Protocol. forwarddelay − The maximum amount of time (in seconds) that the root device will wait before changing states. The user may choose a time between 4 and 30 seconds. The default is 15 seconds. txholdcount - The maximum number of BPDU Hello packets transmitted per interval. Default value = 3. fbpdu [enable | disable] − Allows the forwarding of STP BPDU packets from other network devices when STP is disabled on the Switch. The default is enable. Only Administrator or Operator-level users can issue this command. Example usage: To configure STP with maxage 18 and maxhops of 15: DES-3800:admin#config stp maxage 18 maxhops 15 Command: config stp maxage 18 maxhops 15 Success. DES-3800:admin# config stp ports Purpose Syntax Description Parameters Used to setup STP on the port level. config stp ports {externalCost [auto | ] | hellotime | migrate [yes | no] edge [true | false] | p2p [true | false | auto] | state [enable | disable] | fbpdu [enable | disable]} This command is used to create and configure STP for a group of ports. − Specifies a range of ports to be configured. The beginning and end of the port list range are separated by a dash. For example, 1-4 specifies all of the ports between port 1 and port 4. externalCost − This defines a metric that indicates the relative cost of forwarding packets to the specified port list. Port cost can be set automatically or as a metric value. The default value is auto. auto - Setting this parameter for the external cost will automatically set the speed for forwarding packets to the specified port(s) in the list for optimal efficiency. Default port cost: 100Mbps port = 200000. Gigabit port = 20000. - Define a value between 1 and 200000000 to determine the external cost. The lower the number, the greater the probability the port will be chosen to forward packets. hellotime − The time interval between transmission of configuration messages by the designated port, to other devices on the bridged LAN, thus stating that the Switch is still functioning. The user may choose a time between 1 and 10 seconds. The default is 2 seconds. migrate [yes | no] - Setting this parameter as "yes" will set the ports to send out BPDU packets to other bridges, requesting information on their STP setting If the Switch is configured for RSTP, the port will be capable to migrate from 802.1d STP to 802.1w RSTP. If the Switch is configured 288