Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 217)

• Dynamic core and fixed edge
• Dynamic core and dynamic edge
• Fixed core and dynamic edge
• Fixed core and fixed edge
Dynamic core and fixed edge
In this configuration, all ports on the core device are enabled to learn and advertise VLAN information.
The edge devices are configured to advertise their VLAN configurations on the ports connected to the
core device. GVRP learning is disabled on the edge devices.
Core device Edge device A Edge device B Edge device C
• GVRP is enabled on all
ports.
• Both learning and
advertising are enabled.
NOTE
Since learning is disabled on
all the edge devices,
advertising on the core device
has no effect in this
configuration.
• GVRP is enabled on
port 4/24. Learning is
disabled.
• VLAN 20
• Port 2/1 (untagged)
• Port 4/24 (tagged)
• VLAN 40
• Port 4/1 (untagged)
• Port 4/24 (tagged)
• GVRP is enabled on
port 4/1. Learning is
disabled.
• VLAN 20
• Port 2/24 (untagged)
• Port 4/1 (tagged)
• VLAN 30
• Port 4/24 (untagged)
• Port 4/1 (tagged)
• GVRP is enabled on
port 4/1. Learning is
disabled.
• VLAN 30
• Port 2/24 (untagged)
• Port 4/1 (tagged)
• VLAN 40
• Port 4/24 (untagged)
• Port 4/1 (tagged)
In this configuration, the edge devices are statically (manually) configured with VLAN information. The
core device dynamically configures itself to be a member of each of the edge device VLANs. The
operation of GVRP on the core device results in the following VLAN configuration on the device:
• VLAN 20
‐ 1/24 (tagged)
‐ 6/24 (tagged)
• VLAN 30
‐ 6/24 (tagged)
‐ 8/17 (tagged)
• VLAN 40
‐ 1/24 (tagged)
‐ 8/17 (tagged)
VLAN 20 traffic can now travel through the core between edge devices A and B. Likewise, VLAN 30
traffic can travel between B and C and VLAN 40 traffic can travel between A and C. If an edge device is
moved to a different core port or the VLAN configuration of an edge device is changed, the core device
automatically reconfigures itself to accommodate the change.
Notice that each of the ports in the dynamically created VLANs is tagged. All GVRP VLAN ports
configured by GVRP are tagged, to ensure that the port can be configured for additional VLANs.
NOTE
This example assumes that the core device has no static VLANs configured. However, you can have
static VLANs on a device that is running GVRP. GVRP can dynamically add other ports to the statically
configured VLANs but cannot delete statically configured ports from the VLANs.
Dynamic core and fixed edge
FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide 217
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