Troubleshooting guide

4. Troubleshooting Communication Failures Due to a Resource Shortage
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4.2 When a VLAN identification table resource shortage occurs
4.2.1 Checking the VLAN identification table resource usage
The Switch outputs an operation log message when the VLAN identification table entries reach
80% of the capacity limit. The table below lists the operation log message to be output.
Table 4-4: Operation log message that indicates resource usage
Communication is not affected immediately after the entries reach 80% of the capacity limit. If,
however, functionality such as Layer 2 authentication continues to use the VLAN identification
table, the capacity limit might be reached. This might lead to a resource shortage and cause
problems such as a failure of Layer 2 authentication. You need to pre-check the set value and the
capacity limit value to avoid a situation where the capacity limit is exceeded.
To check resource usage of the VLAN identification table, see the Configuration Guide.
4.2.2 Actions to be taken when a VLAN identification table resource shortage
occurs
When the VLAN identification table entries reach the capacity limit, the Switch outputs a log
message corresponding to the triggers listed in the table below.
Table 4-5: Log message output triggers and log text
No. Trigger Operation log message
1 When the VLAN identification table entries
reach 80% of the capacity limit
VLAN classification table entries was beyond 80
percent of capacity.
No. Trigger Loge message
1 Configuring tag translation • The vlan mapping entry can't be registered
at VLAN classification table (VLAN
<ID>,
port(
<NIF No.>/<Port No.>)).
• The vlan mapping entry can't be registered
at VLAN classification table (VLAN
<ID>,
Channel Group
<Channel Group Number>).
2 Configuring a protocol VLAN • The protocol based VLAN entry can't be
registered at VLAN classification table
(VLAN <ID>,port(<NIF No.>/<Port No.>)).
• The protocol based VLAN entry can't be
registered at VLAN classification table
(VLAN <ID>,Channel Group <Channel Group
Number>
).
• The protocol based VLAN entry can't be
registered at VLAN classification table
(protocol {ethertype | llc | snap-ethertype
}
<HEX>,VLAN <ID>).
• The protocol based VLAN entry can't be
registered at VLAN classification table
(protocol {ethertype | llc | snap-ethertype
}
<HEX>,Vlan-Protocol <Protocol name>).
3 Configuring a MAC VLAN static entry • The MAC-VLAN MAC Address entry can't be
registered at hardware tables.
4 IEEE 802.1X (VLAN-based authentication
[dynamic])
• The 802.1X Supplicant MAC address of MAC
VLAN can't be registered at hardware tables.
Note: This log message is displayed when the show dot1x
logging command is executed.