Alteon Application Switch Operating System Application Guide
VLANs
84
Document
ID:
RDWR-ALOS-V2900_AG1302
Note:
VLAN tagging is required only on ports that are connected to other Alteons or on ports
that connect to tag-capable end-stations, such as servers with VLAN- tagging adapters.
B
Parallel Links with VLANs
This example shows how it is possible through the use of VLANs to create configurations where
there are multiple links between two Alteons, without creating broadcast loops.
In
Figure 3 - Parallel Links with VLANs Example, page 84
, two Alteons are connected with two
different Gigabit Ethernet links. Without VLANs, this configuration would create a broadcast
loop. To prevent broadcast loops, port 25 is on VLAN 10 and port 26 is on VLAN 109. Both
Alteon-to-Alteon links are on different VLANs and therefore are separated into their own
broadcast domains.
Figure 3: Parallel Links with VLANs Example
Note:
In this example, the Gig ports are on different VLANs and the Spanning Tree Protocol (STP) is
disabled. For information on STP, see
Spanning Tree Protocol, page 99
PC #4
A member of VLAN 3, this PC can minimize its broadcast domain to Server
1 and Server 2.
PC #5
A member of both VLAN 1 and VLAN 2, this PC has VLAN-tagging Gigabit
Ethernet adapter installed. It can minimize its broadcast domain to Server
#2 via VLAN 1, and to PC #1 and PC #2 via VLAN 2. The port to which it is
connected is configured for both VLAN 1 and VLAN 2 and has tagging
enabled.
Table 8: Explanation of Example of Multiple VLANs with Tagging Adapters
Component
Description
