Layer 2 Network Communication Failures; Layer 2 Communication By Vlans Is Not Possible - Alaxala AX6700S Troubleshooting Manual

3.5 Layer 2 network communication failures

3.5.1 Layer 2 communication by VLANs is not possible

If Layer 2 communication is not possible when VLANs are used, isolate the cause of the
problem according to the failure analysis method described in the table below.
(1) Checking the VLAN status
Execute the
check the status of the VLAN. The following describes the items that must be checked for
each VLAN type.
(a) Items checked in common for all VLAN types
Check whether the VLAN is configured correctly on the port.
Check whether the correct mode is set for the port. If the expected port does not
belong to the default VLAN (VLAN ID 1), check whether:
Check whether IEEE 802.1X VLAN-based authentication (static), Web
authentication (fixed VLAN mode), or MAC-based authentication is set only for some
of the VLANs configured for trunk ports.
(b) For protocol VLANs
When you are using a protocol VLAN, execute the
protocol has been configured correctly.
# show vlan
:
VLAN ID:100
Protocol VLAN Information
EtherType:0800,0806
Learning:On
:
(c) For MAC VLANs
When you are using a MAC VLAN, execute the
make sure the MAC addresses allowed for communication that uses the VLAN have
been set correctly. In the example below, the value enclosed in parentheses
indicates the functionality used to register the MAC address.
[Functionality]
# show vlan mac-vlan
VLAN ID:100
3 Troubleshooting Functional Failures During Operation
command or the
show vlan
A port VLAN other than VLAN ID 1 is specified for the access VLAN or native
VLAN.
The default VLAN is set in
The port is specified as a mirror port.
Type:Protocol based
Name:ipv4
LLC:
Uplink-VLAN:
: The MAC address is set in the configuration.
static
: The MAC address is set by the IEEE 802.1X functionality.
dot1x
: The MAC address is set by Web authentication.
wa
: The MAC address is set by an authentication VLAN.
vaa
:
MAC Counts:4
command with the
show vlan
for trunk ports.
allowed vlan
show vlan
Status:Up
Snap-EtherType:
Uplink-Block:
show vlan mac-vlan
parameter to
detail
command and make sure the
Tag-Translation:
command and
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