Specifications

Configuring Routing Between VLANs

Configuration Examples for Configuring Routing Between VLANs

Protocols Configured: Address: Received: Transmitted:

IP 172.20.0.3 1558 1521

Virtual LAN ID: 4 (Inter Switch Link Encapsulation)

vLAN Trunk Interface: FastEthernet5/0.2

Protocols Configured: Address: Received: Transmitted:

IP 172.30.0.3 0 7

Configuration Examples for Configuring Routing Between

VLANs

This section provides the following configuration example:

• Single Range Configuration: Example, page 52

• ISL Encapsulation Configuration: Examples, page 53

• Routing IEEE 802.10 Configuration: Example, page 62

• IEEE 802.1Q Encapsulation Configuration: Examples, page 63

• Configuring IEEE 802.1Q-in-Q VLAN Tag Termination: Example, page 67

Single Range Configuration: Example

The following example configures the Fast Ethernet subinterfaces within the range 5/1.1 and 5/1.4 and

applies the following VLAN IDs to those subinterfaces:

Fast Ethernet5/1.1 = VLAN ID 301 (vlan-id)

Fast Ethernet5/1.2 = VLAN ID 302 (vlan-id = 301 + 2 – 1 = 302)

Fast Ethernet5/1.3 = VLAN ID 303 (vlan-id = 301 + 3 – 1 = 303)

Fast Ethernet5/1.4 = VLAN ID 304 (vlan-id = 301 + 4 – 1 = 304)

Router(config)# interface range fastethernet5/1.1 - fastethernet5/1.4

Router(config-if)# encapsulation dot1Q 301

Router(config-if)# no shutdown

Router(config-if)#

*Oct 6 08:24:35: %LINK-3-UPDOWN: Interface FastEthernet5/1.1, changed state to up

*Oct 6 08:24:35: %LINK-3-UPDOWN: Interface FastEthernet5/1.2, changed state to up

*Oct 6 08:24:35: %LINK-3-UPDOWN: Interface FastEthernet5/1.3, changed state to up

*Oct 6 08:24:35: %LINK-3-UPDOWN: Interface FastEthernet5/1.4, changed state to up

*Oct 6 08:24:36: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet5/1.1,

changed state to up

*Oct 6 08:24:36: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet5/1.2,

changed state to up

*Oct 6 08:24:36: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet5/1.3,

changed state to up

*Oct 6 08:24:36: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet5/1.4,

changed state to up