redundant link

[Mohammed_Jashee]

Hi All...
am trying to configure a redundant link between my Core switch to distribution switch.
below am attached the link layout. Am trying to enable STP its showing below error.

(Rack-SW.2 # enable stp "s0"

Error: Incorrect carrier vlan configuration of port 23-24 in stp domain s0
HP_Rack-SW.3 #)

Kindly suggest any best way to achieve the requirement

[Shannon_Rowe]

Thanks all those are all really helpful suggestions. Yes in this instance i have ended up trunking (LAG) the two links and just left STP off. But I seem to come across this issue/behaviour quite often so thought I would post.

In future I will also look into using emistp port mode, and changing our standard and using EAPS.

[dflouret]

Dumb question... Why don't you just create a LAG with the two links? Much simpler than STP and EAPS and better performance since both links would be active simultaneously.

[Bill_Stritzinge]

Easy EAPS configuration with no spanning tree hassle.... will work much better!

Switch1

create eaps ring1
create vlan control1 tag 2000
conf control1 add port 23,24 tag
configure ring1 add control control1
configure ring1 add primary port 23
configure ring1 add secondary port 24
configure ring1 mode master
configure ring1 add protected vlan vlan1
configure ring1 add protected vlan vlan2
configure ring1 add protected vlan vlan3
enable eaps
enable ring1

Switch2

create eaps ring1
create vlan control1 tag 2000
conf control1 add port 23,24 tag
configure ring1 add control control1
configure ring1 add primary port 23
configure ring1 add secondary port 24
configure ring1 mode transit
configure ring1 add protected vlan vlan1
configure ring1 add protected vlan vlan2
configure ring1 add protected vlan vlan3
enable eaps
enable ring1

The only other thing you need is to add port 23,24 tagged to each vlan and remove ALL STP configuration..

Hope this helps...

Bill

[Bill_Stritzinge]

I would suggest an EAPS ring for this ... easy ..