Alcatel Omni Switch/Router User Manual page 666

AutoTracker VLANs
Devices that Generate a Secondary Traffic Type
Source devices sometimes generate more than one traffic type; for example, a device could
generate traffic primarily but also generate a secondary stream of AppleTalk. When a
IP
device generates secondary traffic that does not match any existing
grouped into the primary
To continue the example, if a device generates both
and an AppleTalk
occurs. If, however, an AppleTalk
into the existing
can cause communication problems, as explained below.
create s that accommodate all known network traffic.
VLAN
In this example Device A is
assigned to default
because it does not match any
existing
VLAN
Devices B and C are assigned to
2 because they generate
VLAN
traffic. The secondary AppleTalk
traffic Device C generates is also
grouped into
AppleTalk traffic does not match
any existing
VLAN
The result is that Devices A and
C are unable to communicate.
Creation of an AppleTalk proto-
col VLAN solves this problem. If
a n A p p l e T a l k
Device A will be assigned to it
and removed from Default
#1. Device C will be assigned to
both the
IP VLAN
Talk . Devices A and C can
VLAN
then communicate.
Page 22-6
of which the device is a member.
VLAN
exist, that device is made a member of both
VLAN
VLAN
of which the device is a member – in this example, the
VLAN
#1
VLAN
policy.
IP
2, since the
VLAN
policy.
e x i s t s ,
V L A N
VLAN
and the Apple-
and AppleTalk, and both an
IP
does not exist, all traffic from that device is grouped
For this reason, it is advisable to
Group 2
A s s i g n m e n t o f d e v i c e s t o
default when they do not
VLAN
match any policies is enabled.
1
VLAN
(default #1)
VLAN
no policies allowed
Device A
Device B
AppleTalk traffic only
IP traffic only
policy, that traffic is
VLAN
IP VLAN
s and no problem
VLAN
. This
IP VLAN
Omni Switch/Router
1 2 3 4 5 6 7 8
1 2 3 4 5 6
2
VLAN
IP protocol
VLAN
Device C
IP and AppleTalk
traffic