Avaya Configuring IP Multicasting Services Uživatelský manuál Strana 55

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Customizing DVMRP
114064 Rev. A 4-17
Configuring a Forwarding Table
To keep to a minimum the amount of time that it spends looking up routes,
DVMRP creates and maintains a cache of frequently used routes -- called a
forwarding table -- for each IP interface.
By default, DVMRP preallocates a forwarding table of 32 entries for each circuit.
You can use Site Manager to specify the maximum number of entries (32 to 512)
allowed in the forwarding table associated with this circuit.
When configuring a cache size, you must also keep in mind the TTL value for
entries. If you specify a large cache size, you can specify a larger TTL value. A
smaller cache requires a smaller TTL for cache entries.
By default, DVMRP uses a TTL of 300 seconds for entries in the forwarding
table. You can use Site Manager to specify a TTL in the range of 300 to 86400
seconds.
If your neighbor is running mrouted, the recommended TTL value is 300 seconds.
Site Manager: Forward Cache Size parameter: page A-11
Site Manager: Forward Cache TTL parameter: page A-9
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