3Com Switch 8800 Family Configuration Guide

58 CHAPTER 7: VLAN CONFIGURATION
■ You cannot delete a protocol-based VLAN that has ports associated with.
■ You cannot delete a protocol-based VLAN on a port while the port is associated
with the VLAN.
Configuring IP
Subnet-Based VLAN
The following sections describe the IP subnet-based VLAN configuration tasks:
■ Associating/dissociating a specified port with/from an IP subnet-based VLAN
■ Configuring an IP subnet-based VLAN
Associating/Dissociating
a Specified Port
with/from an IP
Subnet-Based VLAN
Use the following commands to associate/dissociate a specified port with/from an
IP subnet-based VLAN.
Perform the following configuration in Ethernet port view.
Configuring/deleting an
IP Subnet-Based VLAN
Perform the following configuration in VLAN view.
Configure the CPU
Port in an VLAN
The CPU is a special port in the Switch 8800 Family series routing switches. By
default, because the CPU port is in a VLAN, when common broadcast packets and
unknown multicast packets are broadcast within a VLAN, these packets will also
be broadcast to the CPU. To prevent waste of CPU resources, you can move the
CPU port out of the VLAN, so that common broadcast packets and unknown
multicast packets will not be handed to the CPU for processing.
You can use the following command to move the CPU port out of the VLAN.
Perform the following configuration in VLAN view.
By default, the CPU port is in the VLAN.
Tabl e 41 Associate/dissociate a port with/from an IP subnet-based VLAN
Operation Command
Associate a specified port with an IP
subnet-based VLAN
port hybrid ip-vlan vlan vlan-id
Remove a specified port from an IP
subnet-based VLAN
undo port hybrid ip-vlan vlan vlan-id
Tabl e 42 Configure/delete an IP subnet-based VLAN
Operation Command
Create an IP subnet-based VLAN
vlan-type ip-subnet ip ip-address { [
net-mask | net-mask-length ] }
Delete an IP subnet-based VLAN
undo vlan-type ip-subnet { index-begin [ to
index-end ] | all }
Tabl e 43 Move the CPU port out of/into the VLAN
Operation Command
Move the CPU port out of the VLAN trap-to-cpu disable
Move the CPU port into the VLAN undo trap-to-cpu disable