Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
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port for the transfer.
When Snoop is displayed for Type:
See 3.6.4 Multicast forwarding by IGMP snooping is not possible and 3.6.5 Multicast
forwarding by MLD snooping is not possible.
When Dot1x is displayed for Type:
See 3.13.1 Communication failures occurring when IEEE 802.1X is used.
When Wa is displayed for Type:
See 3.13.2 Communication failures occurring when Web authentication is used.
When Macauth is displayed for Type:
See 3.13.3 Communication failures occurring when MAC-based authentication is used.
 If the target MAC address is not displayed, flooding is performed.
• For AX6700S, AX6600S, and AX6300S series switches:
If the MAC address is not displayed, but communication is still disabled, check whether
learning has been suspended by the limitation of MAC address learning. Also check
whether a threshold that is too low is set for the storm control functionality.
• For AX3800S, AX3600S, and AX2400S series switches:
If the MAC address is not displayed, but communication is still disabled, check whether
inter-port relay suppression has been set. Also check whether a threshold that is too low
is set for the storm control functionality.
(b) Checking the MAC address learning limitation
For AX6700S, AX6600S, and AX6300S series switches, execute the
show mac-address-table
command with the
learning-counter parameter and check the information about the MAC
address learning limitation for the target port and VLAN.
>show mac-address-table learning-counter port 1/1-6
Date 2005/09/21 20:00:57 UTC
Port counts:6
Port Count Maximum Threshold Status
1/1 3 - - -
1/2 1000 1000 800 Learning
1/3 0 - - -
1/4 50 60 40 Stop learning <---1
1/5 45 60 40 Learning
1/6 0 60 40 Learning
>show mac-address-table learning-counter vlan
Date 2005/09/21 20:00:57 UTC
VLAN counts:4
ID Count Maximum Threshold Status
1 3 - - -
100 1000 1000 800 Stop learning <---1
200 0 - - No learning <---2
4095 90 100 100 Learning
1. The MAC address learning limit value has been reached, and MAC address learning has been
stopped. Received frames that contain an unlearned sender MAC address are discarded
without the MAC address being learned. However, frames from a VLAN for which MAC
address learning is suppressed are flooded.
2. MAC address learning is set to be suppressed. The received frames are flooded.
(4) Checking filters and QoS
Certain packets might have been discarded either by filtering or by bandwidth monitoring, drop
control, or the QoS control shaper. Make sure that the setting conditions for filters and QoS control