User guide

4-10 B
LACK
D
IAMOND
U
SER
G
UIDE
V
IRTUAL
LAN
S
(VLAN
S
)
In Figure 4-6, System A is a member of VLAN Red. VLAN Red has the VLANid 10. Slot
1, ports 1 and 2 on System A are added to the VLAN as untagged.
The configuration for System A is as follows:
create vlan red
config vlan red tag 10
config vlan red add port 1:1,1:2 untagged
enable gvrp
Switch B does not need to be configured with VLAN or tagging information. Instead,
using GVRP, the server connected to Switch B, and the remainder of the network
connected to Switch B provide Switch B with the information it needs to forward traffic.
Switch A automatically adds slot 8, port 6 to VLAN Red because Switch A now knows
that there are other devices on slot 8, port 6 that need access to VLAN Red.
VLANs that are automatically created using GVRP with the VLANid 10 are given
names in the format
gvrp vlan xxxx
where xxxx is the VLANid (in decimal) that is discovered by GVRP. These VLANs are
not permanently stored in nonvolatile RAM (NVRAM), and you cannot add or remove
ports from these VLANs.
GVRP assumes that the VLANs for which it carries information operate using VLAN
tags, unless explicitly configured otherwise. Typically, you must configure any untagged
VLANs on the switches at the edges of the network, and the GVRP protocol is used
across the core of the network to automatically configure other switches using tagged
VLANs.