Avaya Configuring Bridging Services Manual de usuario Pagina 135

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Using NetBIOS Services
114060 Rev. A 3-17
Parameter: Hash Entry Count
Default: 253
Range: 253 to 2147483648
Function: Specifies the number of entries you want to allow in the hash tables.
Instructions: Increasing the number of hash table entries does not increase the number
of names that a bridge can cache. With larger networks, increasing the
size of the hash tables may, however, reduce internal cache lookup time,
thereby improving overall performance.
Within each hash table entry, names are searched linearly. To increase
performance, reduce the number of names in each hash table entry. The
larger the number of hash table entries, the more likely that fewer names
will hash into each entry.
Selecting a larger hash entry count consumes only slightly more memory
(only 4 bytes per hash table entry). Therefore, you can increase
performance by selecting a hash entry count that is a prime number close
to 1/3 or 1/4 the total number of unique NetBIOS names active in the
network. Using a prime number (for example, 253) is important to
improve the chances of NetBIOS names hashing more evenly into the
hash entries.
For networks that actively use up to 2500 NetBIOS client and server
names, use the value 253. To determine a Hash Entry Count for larger
networks:
Divide the total number of unique NetBIOS client and server names
active in the network by 10.
Adjust the quotient to the nearest (higher or lower) prime number. (A
prime number can only be divided by itself or 1 and still yield a
whole-number quotient.)
MIB Object ID: 1.3.6.1.4.1.18.3.5.1.1.2.1.20
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