Cisco 15327 - Manual (Page 130)

8-2
Ethernet Card Software Feature and Configuration Guide, R7.2
Chapter 8 Configuring VLANs
Configuring IEEE 802.1Q VLAN Encapsulation
ML-Series switching supports up to 900 VLAN subinterfaces per card (for example, 200 VLANs on four
interfaces uses 800 VLAN subinterfaces). A maximum of 255 logical VLANs can be bridged per card
(limited by the number of bridge-groups). Each VLAN subinterface can be configured for any VLAN ID
in the full 1 to 4095 range.
Figure 8-1 shows a network topology in which two VLANs span two
ONS 15454s with ML-Series cards.
Figure 8-1 VLANs Spanning Devices in a Network
Configuring IEEE 802.1Q VLAN Encapsulation
You can configure IEEE 802.1Q VLAN encapsulation on either type of ML-Series card interfaces,
Ethernet or Packet over SONET/SDH (POS). VLAN encapsulation is not supported on POS interfaces
configured with HDLC encapsulation.
The native VLAN is always VLAN ID 1 on ML-Series cards. Frames on the native VLAN are normally
transmitted and received untagged. On an trunk port, all frames from VLANs other than the native
VLAN are transmitted and received tagged.
To configure VLANs using IEEE 802.1Q VLAN encapsulation, perform the following procedure,
beginning in global configuration mode:
Host station
Host station
Host station
Host station
VLAN 10
VLAN 10
VLAN 2
VLAN 10
VLAN 2 VLAN 2
Fast Ethernet 3
ONS 15454
with ML100T-12
ONS 15454
with ML100T-12
83338
Fast Ethernet 1 Fast Ethernet 4
POS 0.10 POS 0. 2
Fast Ethernet 2
Command Purpose
Step 1 Router(config)# bridge bridge-group-number
protocol type
Assigns a bridge group (VLAN) number and
define the appropriate spanning tree type.
Step 2 Router(config)# interface type number Enters interface configuration mode to configure
the interface.
Step 3 Router(config-if)# no ip address Disables IP processing.
Step 4 Router(config)# interface type
number.subinterface-number
Enters subinterface configuration mode to
configure the subinterface.