Alcatel Omni Switch/Router, User Manual

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Application Example 2
Page 24-5
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123456
Omni Switch/Router
IPX Client VLAN Membership
Client 1 both B & C initially, then
either B or C when net-
work number is known
Client 2 both B & C initially, then
either B or C when net-
work number is known
Client 3 D
Client 4 E
Client 5 F
Please note that all ports in Group 3
are also members of Group 3’s default
VLAN
#1.
IPX Servers
Internal
IPX
Router
IPX Client Workstations
Port 1
Port 5
Port 4
Port 3
Port 2
Port 10
Port 9
Client 1
Ethernet- II
encap
Client 2
Ethernet-
II
encap
Client 3
802.2
encap
Client 4
SNAP
encap
Client 5
802.3
encap
Server 1
Network 10
Ethernet-
II
encap
Server 2
Network 20
Ethernet- II
encap
Server 3
Network 30
802.2 encap
Server 4
Network 40
SNAP
encap
Server 5
Network 50
802.3 encap
VLAN
E
IPX
Network 40
SNAP
encap
VLAN F
IPX Network 50
IPX 802.3 encap
VLAN D
IPX Network 30
802.2 encap
VLAN
B
IPX
Network 10
Ethernet-
II
encap
VLAN
C
IPX Network 20
Ethernet-
II
encap
Group 3
Ports 1 – 10
network 10 network 20 network 30 network 40 network 50
t 9
Port 6
Port 7
Port 8
When
IPX
clients boot up, their
encapsulation types are known
but their network numbers are
not. Therefore,
IPX clients are ini-
tially assigned to
VLAN
s accord-
ing to encapsulation type. This is
the reason Clients 1 and 2 (which
use Ethernet-
II encapsulation) are
a s s i g n e d t o
V L A N
s B a n d C
(which both specify Ethernet- II
encapsulation).
Once an
IPX client communicates
with a server or an intervening
router, learns its network number
and begins transmitting frames
with that number, it is removed
from all previously-assigned
IPX
VLAN s and placed into a single
IPX VLAN
according to network
number. Client 1 and Client 2 will
be reassigned to either
VLAN
B
or
VLAN C when their respective
network numbers are known.
IPX
servers always know their
network number, so IPX serv-
ers are assigned to
VLAN
s
according to network number.
IPX VLAN Assignment
at Bootup