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Network design
Topics include:
VLAN defined
The port or native VLAN
Trunk configuration
VLAN binding feature (P330 v3.2.8)
Setting the priority without trunking or VLAN binding (single-VLAN scenario)
VLAN defined
With simple Ethernet switches, the entire switch is one Layer 2 broadcast domain that usually
contains one IP subnetwork (Layer 3 broadcast domain). Think of a single VLAN (on a
VLAN-capable Ethernet switch) as being equivalent to a simple Ethernet switch. A VLAN is a
logical Layer 2 broadcast domain that typically contains one IP subnetwork. Therefore, multiple
VLANs contain logically separated subnetworks. This arrangement is analogous to multiple
switches being physically separated subnetworks. A Layer 3 routing process is required to route
between VLANs, just as one is required to route between subnetworks. This routing process
can take place on a connected router or a router module within a Layer 2/Layer 3 Ethernet
switch. If no routing process is associated with a VLAN, devices on that VLAN can only
communicate with other devices on the same VLAN.
For more information, use the links below to see Avaya's white paper, "LANs and VLANs: A
Simplified Tutorial."
Avaya Associates use this link (http://gozer.dr.avaya.com/)
Business Partners use this link (www.avaya.com)
The port or native VLAN
Port VLAN and native VLAN are synonymous terms. The IEEE 802.1Q standard and most
Avaya switches use the term port VLAN, but Cisco switches use the term native VLAN. Issue
the show trunk command on P330s and CatOS Catalysts to see which term is used in the
display output.
Every port has a port VLAN or a native VLAN. Unless otherwise configured, it is VLAN 1 by
default. It can be configured on a per-port basis with the commands in
All untagged Ethernet frames (with no 802.1Q tag, for example, from a personal computer) are
forwarded on the port VLAN or the native VLAN. This is true even if the Ethernet switch port is
configured as an 802.1Q trunk, or otherwise configured for multiple VLANs. For more
information, see
286 Avaya Application Solutions IP Telephony Deployment Guide
Table 68: Commands to configure a port VLAN or a native VLAN
Avaya P33xT v3.2.8 and later
set port vlan <id> <mod/port>
VLAN binding feature (P330
Cisco CatOS
set vlan <id> <mod/port>
v3.2.8)).
Table
68.
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