Lexmark IBM 9077 manual GRF Configuration Files

Models: IBM 9077

1 342
Download 342 pages 50.2 Kb
Page 283
Image 283

#to be a lead or at least low in the spanning tree.

#The closer a LAN is to being a leaf in the tree, the

#less through traffic it will be asked to carry. A

#LAN would be a candidate for having a large path

#cost if it has a lower bandwidth ot if someone wants

#to minimize unnecessary traffic on it. A better

#description is possibly link cost or port cost.

#

#root_path_cost 5;

#Forward packets with the following destination addresses

#through this port.

#

#forward 00:a0:24:2a:50:e6 00:a0:24:2a:50:e7;

#};

#port gf041 {

#state blocking;

#root_path_cost 6;

#priority 5;

#};

#

#Configuration and tuning parameters that

#govern how a bridge group functions.

#

#priority: This is used to create the bridge ID for

#this bridge. this along with the MAC address of one

#of the ports in the group is used to set the bridge ID.

#This value allows the network manager to influence the

#choice of root bridge and the designated bridge. It is

#appended as the most significant portion of a bridge ID.

#A lower numerical value for bridge priority makes the

#bridge more likely to become the root.

#

#priority 128;

#hello_time: Interval between the transmission of configuration

#BPDUs by a bridge that is attempting to become the root

#bridge or is root bridge.

#

#It is the timer that elapses

#between generation of configuration messages by a bridge

#that assumes itself to be the root.

#Shortening this time will make the protocol more

#robust, in case the probability of loss of configuration

#messages is high. Lengthening the timer lowers the overhead

#of the alogorithm (because the interval between transmission

#of configuration messages will be larger).

#

#The recommended time is 2 sec.

#hello_time 2 seconds;

#

#forward_delay: The time value advertised by this

#bridge for deciding the time delay that a port must

#spend in the listening and learning states.

#

#This parameter temporarily prevents a bridge from starting

#to forward data packets to and from a link until news of

#a topology change has spread to all parts of a bridged

#network. This shousl give all links that need to be turned

#off in the new topology time to do so before new links are

GRF Configuration Files 265

Page 283
Image 283
Lexmark IBM 9077 manual GRF Configuration Files