Traffic storm is visible on blocked by STP link #29
Description
Problem Description:
Traffic storm is visible on blocked by STP link.
OpenSwitch version:
Version OpenSwitch 0.4.0 (Build: appliance-ops-0.4.0-meraswitch/devel/master-20170209151505-dev)
Test Topology:
Steps to reproduce the problem:
- Configure DUTs and PCs as in attached file.
- Check STP topology on all DUTs:
switch1(config-if)# do sh spanning-tree
MST0
Spanning tree status: Enabled
Root ID Priority : 16384
MAC-Address: 70:72:cf:d6:80:fc
This bridge is the root
Hello time(in seconds):2 Max Age(in seconds):20 Forward Delay(in seconds):15
Bridge ID Priority : 16384
MAC-Address: 70:72:cf:d6:80:fc
Hello time(in seconds):2 Max Age(in seconds):20 Forward Delay(in seconds):15
Port Role State Cost Priority Type
------------ -------------- ---------- ------- ---------- ----------
eth1 Designated Forwarding 20000 128 point_to_point
eth2 Designated Forwarding 20000 128 point_to_point
eth3 Designated Forwarding 20000 128 point_to_point
switch2(config-if)# do sh spanning-tree
MST0
Spanning tree status: Enabled
Root ID Priority : 16384
MAC-Address: 70:72:cf:d6:80:fc
Hello time(in seconds):2 Max Age(in seconds):20 Forward Delay(in seconds):15
Bridge ID Priority : 32768
MAC-Address: 70:72:cf:dc:8d:11
Hello time(in seconds):2 Max Age(in seconds):20 Forward Delay(in seconds):15
Port Role State Cost Priority Type
------------ -------------- ---------- ------- ---------- ----------
eth1 Root Forwarding 20000 128 point_to_point
eth2 Alternate Blocking 20000 128 point_to_point
eth3 Designated Forwarding 20000 128 point_to_point
switch3(config-if)# do sh spanning-tree
MST0
Spanning tree status: Enabled
Root ID Priority : 16384
MAC-Address: 70:72:cf:d6:80:fc
Hello time(in seconds):2 Max Age(in seconds):20 Forward Delay(in seconds):15
Bridge ID Priority : 32768
MAC-Address: 70:72:cf:21:d9:b6
Hello time(in seconds):2 Max Age(in seconds):20 Forward Delay(in seconds):15
Port Role State Cost Priority Type
------------ -------------- ---------- ------- ---------- ----------
eth1 Root Forwarding 20000 128 point_to_point
eth2 Designated Forwarding 20000 128 point_to_point
- Try to send ping from PC1 to PC2. -
NOK: ping is absent.
PC1> ping 10.0.0.2 -c 1
host (10.0.0.2) not reachable
- For more info about storm please see attached capture files (in both files the same capture).