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Port 27?

Posted: Tue Dec 29, 2020 12:23 pm
by mblfone
Good Morning,
I awoke to an email indicating that our bonded interface changed state on our WS-26-400-AC running 1.5.2 firmware. Why this happened is still a mystery; no correlating log entries on the attached router.

But what is port 27 on a 26 port switch?


Dec 28 19:05:50 LACP: LACP changed state to Active on port 1 (key 10)
Dec 28 19:05:50 STP: msti 0 set port 27 to discarding
Dec 28 19:05:50 STP: msti 0 set port 1 to discarding
Dec 28 19:05:50 switch[2931]: LACP changed state to Active on port 1 (Port 1-Router) (key 10)
Dec 28 19:05:50 STP: msti 0 set port 2 to discarding
Dec 28 19:05:53 STP: msti 0 set port 27 to learning
Dec 28 19:05:53 STP: msti 0 set port 1 to learning
Dec 28 19:05:53 STP: msti 0 set port 2 to learning
Dec 28 19:05:53 STP: msti 0 set port 27 to forwarding
Dec 28 19:05:53 STP: msti 0 set port 1 to forwarding
Dec 28 19:05:53 STP: msti 0 set port 2 to forwarding
The logs suggest that all of our customers on this site lost net for three seconds...
Any thoughts are appreciated.

Happy New Year.

Re: Port 27?

Posted: Tue Dec 29, 2020 4:38 pm
by JustJoe
Any chance a tall shiny obelisk appeared at about the same time next to your network equipment cabinet? :yikes:

... Rumor has it those dang cheap aliens are stealing Internet access any way they can. lol :wink:

Re: Port 27?

Posted: Wed Dec 30, 2020 12:51 pm
by mblfone
I believe it is perhaps a virtual port initiated by LACP; aliens too.