Instance Table

Instance Table

Click the ID number in the Instance IDs column, to achieve finer control of a particular VLAN table. The Address Table Instance screen displays for the instance ID selected.(See Figure 9-3)

Figure 9-3. Address Table Instance Dialog Box

See Table 9-3 for a definition of the Address Table Instance dialog box parameters.

Table 9-3. Address Table Instance Parameters
Parameter	Definition
VLAN Association	Name of the VLAN this Hash table is associated with.
Total Number of Entries	Displays the total number of entries (MAC addresses) for this VLAN.
Entry Type	Displays the entry type for this VLAN. Options include: Learned - Entry is dynamically learned. Management - Entry is configured by the user statically. Self - Entries for internal addresses contained within the switch. Multicast - Entries belong to Multicast Groups.
Entry Validity	Displays the entry validity for this VLAN. Options include: Valid - Entry exists. Invalid - Entry has aged out but still exists even though the port binding is invalid.
Hash Table	Select one of the following hash table parameters: Size - Select the size to alter the space available for this address table. The selection range is 16 to 8192 incrementing in the powers of 2. NOTE: Note: The number of addresses for a given hash table is 4:1 (for example, if you have a hash table of 16 bytes, the VLAN can hold 64 addresses in its table instance.To achieve optimal Bucket Utilization, Hash Table size should be � times the number of expected AFT entries (MAC entries) on the VLAN. Auto Increment - Select an option to allow the hash table to grow dynamically larger if more addresses are discovered. The options are: True - Enables auto-increment of the hash table. False - Disables auto-increment to prevent the hash table from growing dynamically at the risk of extra flooding.
Bucket Info	Displays parameters to monitor the efficiency of the hash table allocations. Options include: Count - The Total Number of Entries (MAC Addresses) for that VLAN Capacity - Indicates bucket capacity. Utilization - The number of entries divided by the total bucket capacity.

Click:
APPLY to save your changes
CANCEL to restore previous settings
Delete All Learned Entries if you want to relearn the entire table
Delete Invalid Learned Entries if you want to delete all entries that are currently aged out.

NOTE: If you change the Hash Table Size, the switch relearns all addresses in that table, causing the switch to flood packets for a few seconds.