Feature Example
The following example shows VLAN 20, VLAN 55,
and VLAN 103 mapped to bridge groups within a Layer 3 switch (such
as a 2948G-L3). Interfaces 1 through 4 on the Layer 3 device are to
be mapped to VLAN 20, interfaces 11 and 12 are to be mapped to VLAN
55, and interfaces 25 and 26 are to be mapped to VLAN 103.
Interface G 49 will provide the 802.1Q trunk connection to the
Layer 2 switch. The switch will also be providing Layer 3 functions
for VLAN 55 and VLAN 103. Figure D-1 shows the connections for this
example. The configuration that
follows
would be entered on the
Layer 3 switch.
L3Switch(config)#
bridge 20 protocol ieee
L3Switch(config)#
bridge 55 protocol ieee
L3Switch(config)#
bridge 103 protocol ieee
L3Switch(config)#
bridge irb
L3Switch(config)#
interface Fastethernet 1
L3Switch(interface)#
bridge-group 20
L3Switch(interface)#
interface Fastethernet 2
L3Switch(interface)#
bridge-group 20
L3Switch(interface)#
interface Fastethernet 3
L3Switch(interface)#
bridge-group 20
L3Switch(interface)#
interface Fastethernet 4
L3Switch(interface)#
bridge-group 20
L3Switch(interface)#
interface Fastethernet 11
L3Switch(interface)#
bridge-group 55
L3Switch(interface)#
interface Fastethernet 12
L3Switch(interface)#
bridge-group 55
L3Switch(interface)#
interface Fastethernet 25
L3Switch(interface)#
bridge-group 103
L3Switch(interface)#
interface Fastethernet 26
L3Switch(interface)#
bridge-group 103
L3Switch(interface)#
interface Gigabitethernet 49.20
L3Switch(interface-subif)#
encapsulation dot1q 20
L3Switch(interface-subif)#
bridge-group 20
L3Switch(interface-subif)#
interface Gigabitethernet 49.55
L3Switch(interface-subif)#
encapsulation dot1q 55
L3Switch(interface-subif)#
bridge-group 55
L3Switch(interface-subif)#
interface Gigabitethernet 49.103
L3Switch(interface-subif)#
encapsulation dot1q 103
L3Switch(interface-subif)#
bridge-group 103
L3Switch(interface-subif)#
bridge 55 route ip
L3Switch(config)#
bridge 103 route ip
L3Switch(config)#
interface BVI 55
L3Switch(interface)#
ip address 192.168.55.1 255.255.255.0
L3Switch(config)#
interface BVI 103
L3Switch(interface)#
ip address 192.168.103.1 255.255.255.0
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