C
HAPTER
35
| VLAN Commands
Configuring IP Subnet VLANs
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CONFIGURING IP SUBNET VLANS
When using IEEE 802.1Q port-based VLAN classification, all untagged
frames received by a port are classified as belonging to the VLAN whose
VID (PVID) is associated with that port.
When IP subnet-based VLAN classification is enabled, the source address of
untagged ingress frames are checked against the IP subnet-to-VLAN
mapping table. If an entry is found for that subnet, these frames are
assigned to the VLAN indicated in the entry. If no IP subnet is matched, the
untagged frames are classified as belonging to the receiving port’s VLAN ID
(PVID).
subnet-vlan This command configures IP Subnet VLAN assignments. Use the no form to
remove an IP subnet-to-VLAN assignment.
SYNTAX
subnet-vlan subnet ip-address mask vlan vlan-id [priority priority]
no subnet-vlan subnet {ip-address mask | all}
ip-address – The IP address that defines the subnet. Valid IP
addresses consist of four decimal numbers, 0 to 255, separated by
periods.
mask – This mask identifies the host address bits of the IP subnet.
vlan-id – VLAN to which matching IP subnet traffic is forwarded.
(Range: 1-4094)
priority – The priority assigned to untagged ingress traffic.
(Range: 0-7, where 7 is the highest priority)
DEFAULT SETTING
Priority: 0
COMMAND MODE
Global Configuration
COMMAND USAGE
â—† Each IP subnet can be mapped to only one VLAN ID. An IP subnet
consists of an IP address and a subnet mask. The specified VLAN need
not be an existing VLAN.
â—† When an untagged frame is received by a port, the source IP address is
checked against the IP subnet-to-VLAN mapping table, and if an entry
Table 140: IP Subnet VLAN Commands
Command Function Mode
subnet-vlan Defines the IP Subnet VLANs GC
show subnet-vlan Displays IP Subnet VLAN settings PE
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