For your convenience, I have included my architecture for the Cisco 2901-sec Cisco 2901-sec networking system. switch3 is the source of the problem that I have faced. Switch3 is linked to switch2 by the fa0/3 port, which results in a route cost of 19. There is a connection between switch 2 and switch1 (the root switch) via fa0/1 (path cost = 19). The root path cost from switch3 should be, according to stp, 19 plus 19, which equals 38. The result of the “display spanning-tree detail” command, on the other hand, indicates that the root path cost is 19. switching device 3’s output ————— display the spanning-tree detail with switch3#show The ieee compatible spanning tree protocol bridge identifier is being executed by vlan0001, which has a priority of 32768, a system identification number of 1, and a 00d0.badc.4153. configured Greetings, time 2, maximum age 20, and forward delay 15 The priority of the current root is 32769. a root port of three (fastethernet0/3), with a root path cost of nineteen dollars / It is my opinion that the correct value should be 38 / topology change flag not set, detected flag not set number of topology changes being 0 The most recent modification was made at 00:00:00 from fastethernet0/1 times: hold 1, topology change 35, notification 2 hello, two, maximum age twenty, and forward delay The following 15 timers are in effect: hello 0, topology change 0, notification 0, aging 300 port 3 (fastethernet0/3) of vlan0001 is the root forwarding port path cost 19, port priority 128, port identification 128.3 designated root has priority 128, and address 0001.42b7.1303 The specified bridge has priority 32769 and the address 0009.7c05.c258. The timers are as follows: message age 16, forward delay 0, hold 0 number of transitions to forwarding state: 1 connection type is point-to-point by default. The forwarding port known as port 10 (fastethernet0/10) of vlan0001 has a path cost of 19, a port priority of 128, a port identifier of 128.10 that is designated as the root has a priority of 128, an address of 0001.42b7.1303 that is designated as the bridge has a priority of 32769, an address of 0009.7c05.c258 that is designated as the port id of 128.10, and a designated path cost of 19 timers: The number of transitions to the forwarding stage is as follows: message age 16, forward delay 0, hold 0 position: One form of connection is always point-to-point by default. —————— Please let me know if I am experiencing fatigue or if there is a problem with the packet tracer. yes. You have it correctly; the correct number is 38. I was also unable to locate the address 0009.7c05.c258 in the fourth line of your report. In the event that s1 is selected as the stp root, it is essential that it be present. You may check the rootcost value that your switch3 provides by typing the “display spanning-tree root” command on it and seeing what it offers as the result. According to the topology, the route cost should be 38 to the root if the connection is down between SW1 and SW3 and the link is direct. (for some examples of output, see below) sw#show root showing the spanning tree root Greetings, max forwarding of vlan root id, cost, duration, and an age root port For example, ————————— —————————— ————- ——- —- —- —————— vlan0001 It is 1 0006.d604.ed00. 6 2 twenty-five te1/1/1 The vlan number is 4108 1cdf.0f83.6280. te1/1/1 2 2 20 5 te1/1/1 VLAN0013 4109 1cdf.0f83.6280 2 2 20 15 te1/1/1 vlan0013 4109 both Cisco 2911-sec and Cisco 2911-sec
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