4-12
Layer 3 Switching Software Feature and Configuration Guide
78-6235-04, Cisco IOS Release 12.0(10)W5(18)
Chapter4 Configuring Interfaces
Monitoring VLAN Operation
Example
The following example shows how to configure the bridging between native and non-native 802.1Q
VLANs shown in Figure 4-3:
Router(config)# interface fastethernet 1/0/1.1
Router(config-subif)# encap dot1q 1 native
Router(config-subif)# bridge-group 1
Router(config-subif)# interface fastethernet 1/0/0
Router(config-if)# bridge-group 1
Router(config-if)# exit
Router(config)# bridge 1 protocol ieee
Router(config)# interface fastethernet 1/0/1.2
Router(config-subif)# encap dot1q 100
Router(config-subif)# bridge-group 2
Router(config-subif)# interface fastethernet 3/0/1
Router(config-subif)# bridge-group 2
Router(config-subif)# exit
Router(config)# bridge 2 protocol ieee
Router(config)# exit
Router# copy system:running-config nvram:startup-config
Monitoring VLAN Operation
Once the VLANs are configured on the switch router, you can monitor their operation using the
following commands:
To configure encapsulation over the EtherChannel, see the “About Encapsulation over EtherChannel”
section on page 7-6.
About Packet over SONET (Catalyst 8540)
SynchronousOptical Network (SONET) is an octet-synchronous multiplex scheme that defines a family
of standard rates and formats. Optical specifications are defined for single-mode fiber and multimode
fiber. The transmission rates are integral multiples of 51.840 Mbps. For example, the POS OC-12c
uplink interface provides 622.080 Mbps over single-mode optical fiber.
POS providesfor the serial transmission of data over SONET frames using either High-Level Data Link
Control (HDLC) protocol (the default) or Point-to-Point Protocol (PPP) encapsulation. On serial
interfaces, Cisco’s implementation provides error detection and synchronous framing functions of
traditional HDLC without the windowing or retransmission that are found in traditional HDLC.
Command Purpose
show vlan vlan-id Displays information on all configured VLANs or on a specific
VLAN (by VLAN ID number).
clear vlan vlan-id Clears the counters for all VLANs, when the VLAN ID is not
specified.
debug vlan packet Displayscontents of the packets sent to and exiting from the route
processor.