Avaya 580 - Manual (Page 176)

6-10 User Guide for the Avaya P580 and P882 Multiservice Switches, v6.1
Chapter 6
CAUTION:
6. Click APPLY to create the new VLAN, or CANCEL to restore previous
settings.
Before configuring Hash Tables and Auto Increment Hash Table
parameters, Avaya strongly recommends that you review the
contents of
Chapter 9 , “ Managing the Address Forwarding Table .”
Configuring VLAN Parameters
To configure all ports assigned to a VLAN:
1. In the navigation pane, expand the L2 Switching > VLANs folders, and
then click Configuration. The VLAN Configuration Web page is
displayed in the content pane. See
Figure 6-3 .
2. Click on the Name of the VLAN whose members you want to view.
The VLAN Switch Ports Web page is displayed in the content pane. See
Figure 6-5 .
Initial Hash
Table Size For every VLAN created, a hash table is allocated of the
initial size. The hash table keeps track of the Layer 2
(MAC) addresses associated with a VLAN.
The default setting for Initial Hash Table Size,1024,
allows the user to configure approximately 20 simultaneous
VLANs. However, the switch supports 1,000 VLANs. To
support 1000 simultaneous VLANs, the Hash table size
should be at 16. To increase the number of VLANs you can
implement, simply decrease the initial hash table size for
each new address table instance.
Note: The number of addresses for a given hash table is
approximately 4:1 (for example, if you have a hash
table of 6 bytes, the VLAN can hold 64 addresses
in its table instance.
Auto Increment
HT Size Auto-Increment HT (Hash Table) Size determines whether
the size of the VLAN’s Hash Table can grow if software
determines it to be undersized for the number of known
Layer 2 addresses of a VLAN. Select TRUE to allow the
switch to increase the size of the Hash Table. Select FALSE
to disable the feature. The default is TRUE.
Table 6-1. Create VLAN Web Page Parameters
Parameter Definition
2 of 2