7/6/2023 0 Comments Gswitch and triangleWhen actual values are entered, the calculator output will reflect what the shape of the input triangle should look like. Note that the triangle provided in the calculator is not shown to scale while it looks equilateral (and has angle markings that typically would be read as equal), it is not necessarily equilateral and is simply a representation of a triangle. As can be seen from the triangles above, the length and internal angles of a triangle are directly related, so it makes sense that an equilateral triangle has three equal internal angles, and three equal length sides. Similar notation exists for the internal angles of a triangle, denoted by differing numbers of concentric arcs located at the triangle's vertices. Tick marks on the edge of a triangle are a common notation that reflects the length of the side, where the same number of ticks means equal length. When none of the sides of a triangle have equal lengths, it is referred to as scalene, as depicted below. For example, a triangle in which all three sides have equal lengths is called an equilateral triangle while a triangle in which two sides have equal lengths is called isosceles. Furthermore, triangles tend to be described based on the length of their sides, as well as their internal angles. Hence, a triangle with vertices a, b, and c is typically denoted as Δabc. A triangle is usually referred to by its vertices. A vertex is a point where two or more curves, lines, or edges meet in the case of a triangle, the three vertices are joined by three line segments called edges. When radians are selected as the angle unit, it can take values such as pi/2, pi/4, etc.Ī triangle is a polygon that has three vertices. Please provide 3 values including at least one side to the following 6 fields, and click the "Calculate" button. The UplinkFast and BackboneFast alone, however, are not and will not be activated.Home / math / triangle calculator Triangle Calculator To sum it up, the RSTP already incorporates the functionality of UplinkFast and BackboneFast (although not implemented exactly in the way the UplinkFast and BackboneFast implement it), and when you activate RSTP, you get UplinkFast-like and BackboneFast-like functionality. That fact is confirmed by your output of show span sum In fact, even if you configured them together with running RSTP, they would not be active because RSTP already provides their functionality, although by slightly different mechanisms. However, the BackboneFast and UplinkFast themselves are distinct extensions and they are not activated along with RSTP. Therefore, activating the RSTP (or the RPVST/RPVST ) immediately gives you the advantages of BackboneFast and UplinkFast. The RSTP alone, by itself, has built-in mechanisms that provide a similar functionality to Cisco's proprietary BackboneFast and UplinkFast STP extensions. It's better to use root guard and some lower priority like 20000 or even better "spanning-tree vlan 150 root primary" - this will setup automaticly lower priority then you have got in network.Īnd RSTP does not need backbonefast uplinkfast, it's already built-in. Because other switch with priority 0 but lower mac-address may became root switch.Īnd also if you will need to move to another root switch smoothly after a time - you can't, because you can't set priority lower then 0 at that new switch and it never can be root. Sorry for my poor english hope you have anderstand what I ask. I'm not expecting any complete response but, at least some links or documentations. How can I improve the system performance and avoiding the stp long time of recovery ?Īnd does my port-channel, on the 3750 stack, is a good or bad practice for having an instant fail-over between the two switches 3550 ? I would like to know how can I make a fully redundant system without losing any data when one of the 3 link fail ? It seems like when I unplug a fastEthernet link from a 3550 that make the switch take the path of the GigabitEthernet fiber to the other 3550, and that's perfect (It just take less than a second).īut when I unplug or plug that Gi fiber it take 30-50 sec to the switch to recover connection, and that's annoying. ![]() (Gi1/0/ to 1-Catalyst 3550 and Gi2/0/1 to 2-Catalyst 3550).Įvery switches have their ip address in the same vlan (vlan 150 and not native). Interfaces Gi1/0/1 and Gi2/0/1 are in a port-channel mode active. The configuration of the two 3550 are pretty simple: ( /!\ All of my link are up, in trunk 802.1q mode). I have 3 switch inter-connected ( two are Catalyst 3550 and a stack of two Catalyst 3750). Here I have some questions about a "basic" topology with 3 switches.
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