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show spanning vlan 50. It shows an interface named "st5" which is blocked.

Difan Zhao
Level 5
Level 5

‎02-05-2009 08:53 AM - edited ‎03-06-2019 03:52 AM

The line is:

<br />St5 Back BLK 100 128.876 P2p

<br />

<br />What is this st5 interface? I can guess that it's about stack5. However what does it mean exactly?

<br />

<br />I am using a stack of 5 Cisco 3750 switches.

<br />

<br />Thanks!

<br />Difan

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0 Helpful
3 Replies 3

Yudong Wu
Level 7
Level 7

‎02-05-2009 12:27 PM

Yes, it's stack port but I am not sure how it is numbered.

To my knowledge, it should not be displayed in "show spanning" unless debug spanning is enabled.

If not and your switch running a old code, it might be a bug.

0 Helpful

Difan Zhao
Level 5
Level 5
In response to Giuseppe Larosa

‎02-09-2009 03:07 PM

The second link helps! The first link is too long... I will read it some day... Thanks!

0 Helpful
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