Loop Detection Problem in Stack

[Anonymous]

Hello,

I have 2 stakcs. One of them has 9 switches and another one has 11 switches. I activate loop detection for all vlans. 

When I connect my uplink to stack masters, there is no problem. Loop detection works.

But when I connect uplink to another stack members and I make a loop, loop detection does not work.

Is this a firmware problem or a configuration problem? Have you ever heard of this problem before?

There is stack config below: 5/2/5 is uplink port.  

CUS_211_HUKUK# show running-config
Current configuration:
!
ver 08.0.90jT213
!
stack unit 1
  module 1 icx7250-48p-poe-port-management-module
  module 2 icx7250-sfp-plus-8port-80g-module
  priority 128
  stack-trunk 1/2/1 to 1/2/2
  stack-trunk 1/2/3 to 1/2/4
stack unit 2
  module 1 icx7250-48p-poe-port-management-module
  module 2 icx7250-sfp-plus-8port-80g-module
  stack-trunk 2/2/1 to 2/2/2
  stack-trunk 2/2/3 to 2/2/4
stack unit 3
  module 1 icx7250-48p-poe-port-management-module
  module 2 icx7250-sfp-plus-8port-80g-module
  stack-trunk 3/2/1 to 3/2/2
  stack-trunk 3/2/3 to 3/2/4
stack unit 4
  module 1 icx7250-48p-poe-port-management-module
  module 2 icx7250-sfp-plus-8port-80g-module
  stack-trunk 4/2/1 to 4/2/2
  stack-trunk 4/2/3 to 4/2/4
stack unit 5
  module 1 icx7250-48-port-management-module
  module 2 icx7250-sfp-plus-8port-80g-module
  stack-trunk 5/2/1 to 5/2/2
  stack-trunk 5/2/3 to 5/2/4
stack unit 6
  module 1 icx7250-48-port-management-module
  module 2 icx7250-sfp-plus-8port-80g-module
  stack-trunk 6/2/1 to 6/2/2
  stack-trunk 6/2/3 to 6/2/4
stack unit 7
  module 1 icx7250-48-port-management-module
  module 2 icx7250-sfp-plus-8port-80g-module
  stack-trunk 7/2/1 to 7/2/2
  stack-trunk 7/2/3 to 7/2/4
stack unit 8
  module 1 icx7250-48-port-management-module
  module 2 icx7250-sfp-plus-8port-80g-module
  stack-trunk 8/2/1 to 8/2/2
  stack-trunk 8/2/3 to 8/2/4
stack unit 9
  module 1 icx7250-48-port-management-module
  module 2 icx7250-sfp-plus-8port-80g-module
  stack-trunk 9/2/1 to 9/2/2
  stack-trunk 9/2/3 to 9/2/4
stack enable
stack mac d4c1.9e77.a9ac
!
!
!
!
!
vlan 1 name DEFAULT-VLAN by port
 loop-detection
!
!
!
!
vlan 1810 name Idari by port
 tagged ethe 5/2/5
 untagged ethe 1/1/1 to 1/1/48 ethe 1/2/5 to 1/2/8 ethe 2/1/1 to 2/1/48 ethe 2/2/5 to 2/2/8 ethe 3/1/1 to 3/1/48 ethe 3/2/5 to 3/2/8 ethe 4/1/1 to 4/1/48 ethe 4/2/5 to 4/2/8 ethe 5/1/1 to 5/1/48 ethe 5/2/6 to 5/2/8 ethe 6/1/1 to 6/1/48 ethe 6/2/5 to 6/2/8 ethe 7/1/1 to 7/1/48 ethe 7/2/5 to 7/2/8 ethe 8/1/1 to 8/1/48 ethe 8/2/5 to 8/2/8 ethe 9/1/1 to 9/1/48 ethe 9/2/5 to 9/2/8
 loop-detection
!
vlan 1911 name Yonetim by port
 tagged ethe 5/2/5
 router-interface ve 1911

loop-detection
!
!
!
!
!
!
!
!
!
!
loop-detection-interval 30
errdisable recovery cause loop-detect
errdisable recovery interval 600
aaa authentication web-server default local
aaa authentication login default local
enable aaa console
enable acl-per-port-per-vlan
hostname CUS_211_HUKUK
ip dhcp snooping vlan 1810
ip route 0.0.0.0/0 192.168.11.1
!
no telnet server
username super password .....
!
!
!
!
hitless-failover enable
!
!
sz registrar
!
!
!
!
!
!
!
!
!

interface ethernet 5/2/5
 dhcp snooping trust
!
interface ve 1911
 ip address 192.168.11.212 255.255.255.0
!
!
!
!
!
!
!
!
!
!
!
!
!
end

[BenBeck]

Hello, 

I have not heard of any issues with loop detection. It's a pretty simple protocol. How are you creating a loop? You can issue 'show loop-detection status' to see control packets being sent/received.

[Anonymous]

Yes it is very simple and it does not work properly unfortunately.

[BenBeck]

Hey There, 

Please open a support case (see my signature) if you believe the protocol is not behaving properly. Our support team can take a more in-depth look and escalate if needed.

[Anonymous]

Ok I will open case. Thanks.