Avaya Cajun P882 User Manual page 140

Chapter 4
CAUTION
4-10
Table 4-1. Create VLAN Dialog Box Parameters
Parameter Definition
Initial Hash For every VLAN created, a hash table is allocated of the
Table Size 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:
Auto Auto-Increment HT (Hash Table) Size determines whether
Increment HT the size of the VLAN's Hash Table can grow if software
Size 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.
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 4,
Tree, Hunt Groups, and VTP
"Managing the Address Forwarding
Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, Version 5.3.1
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 it's table instance.
"Using VLANs, Spanning
Snooping," and Chapter 6,
Table."