Timeline for Spanning Tree cost calculation
Current License: CC BY-SA 3.0
18 events
| when toggle format | what | by | license | comment | |
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| Mar 30, 2017 at 16:45 | comment | added | Satish | That will work i guess.. good idea.. | |
| Mar 30, 2017 at 16:29 | comment | added | Ron Maupin♦ |
@Satish, are you looking at it backwards? What if you reduce the cost on the 10G links to be 1? Wouldn't the 10 G link be preferred, except in the link failure?
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| Mar 30, 2017 at 16:20 | comment | added | Satish | if i adjust spanning-tree cost of SW3 2G link equal to 10G link then who will be the tie breaker? i believe port-id but who will decide that? | |
| Mar 30, 2017 at 5:20 | comment | added | Satish | Ego location means between to building, Geo location would be bad word you right. | |
| Mar 30, 2017 at 3:14 | comment | added | Ron Maupin♦ | I really don't understand how layer-2 switching has anything to do with geo-location, which should be based on layer-3. | |
| Mar 30, 2017 at 2:29 | comment | added | Satish |
Because of geo location scenario we end-up with this design, should i increase cost of SW3 to not send traffic over 2G link and use 10G but i was if link between SW1 and SW2 is down then it use own 2G trunk
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| Mar 30, 2017 at 1:06 | history | edited | Ron Maupin♦ | CC BY-SA 3.0 |
added 18 characters in body
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| Mar 30, 2017 at 1:00 | history | edited | Ron Maupin♦ | CC BY-SA 3.0 |
added 481 characters in body
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| Mar 29, 2017 at 18:01 | comment | added | Satish | I have EDIT my question before before i put wrong diagram and confused you guys!! sorry for that.. now this is perfect diagram | |
| Mar 28, 2017 at 23:57 | comment | added | Satish | Guys!! hold on.. let me find out network diagram to see how the cabling perform because it doesn't make sense.. just wait for next update. | |
| Mar 28, 2017 at 23:57 | comment | added | Ron Maupin♦ | Is Switch 1 somehow the root bridge? What does the same command give you on Switch 1? | |
| Mar 28, 2017 at 23:53 | comment | added | Satish |
See my question i have updated with command output.. i am 100000% sure and my monitoring tool showing 10G driving 500mbp data and 2G has only 100kbps so its very clear SW2 using 10G for data.
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| Mar 28, 2017 at 23:49 | comment | added | Ron Maupin♦ |
Are you sure of the path costs? If you have 2+2 for the 10G link, and 3 for the 2G link, then it should be using the 2G link.
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| Mar 28, 2017 at 23:46 | comment | added | Satish |
I have updated question. NO sw2 currently using 10G and its 2G link is in BLK mode. i think i didn't explain that, in short SW1 and SW2 both using 10G for root bridge and 2G is in blocking mode. that is why i am confused how spanning tree calculation cost?
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| Mar 28, 2017 at 23:45 | history | edited | Ron Maupin♦ | CC BY-SA 3.0 |
deleted 56 characters in body
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| Mar 28, 2017 at 23:44 | comment | added | Ron Maupin♦ |
Based on your values, if every link is up, Switch 3 will use the 2G link, but I think that your Switch 2 is also using its 2G link because you have its cost at 3 while its 10G link has a cost of 4.
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| Mar 28, 2017 at 23:37 | comment | added | Satish |
I am confused with your question, If i plug SW3 today the way i showed you in diagram then which path it will take? 10G or 2G ?
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| Mar 28, 2017 at 23:32 | history | answered | Ron Maupin♦ | CC BY-SA 3.0 |