Avaya Configuring IP Multicasting and Multimedia Services Manual de usuario descargar pdf (Pagina 149)

100

101

Customizing DVMRP

117355-D Rev 00

4-59

Configuring a Forwarding Table

By default, DVMRP preallocates a forwarding table -- or cache -- for 32 entries.

You can use the BCC or Site Manager to specify the maximum number of entries

(from 32 through 512) allowed in the forwarding table associated with this tunnel

interface.

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 assigns a TTL value of 7200 seconds (2 hours) to an entry in

a tunnel forwarding table. You can use the BCC or Site Manager to assign a value

from 300 seconds (5 minutes) through 86,400 seconds (24 hours).

Specifying the Forwarding Table Size

To specify the forwarding table size, you can use the BCC or Site Manager.

Using the BCC

To specify the size of the forwarding table for a tunnel, navigate to a tunnel

prompt (for example,

box; tunnels; dvmrp/2.2.2.2/2.2.4.5

) and enter:

cache-size

entries

is the number of entries that DVMRP preallocates for the forwarding table.

The default value is 32 entries.

For example, the following command causes DVMRP to preallocate space for a

forwarding table with 50 entries for tunnel 2.3.4.5/4.4.2.3:

dvmrp/2.3.4.5/4.4.2.3#

cache-size 50

dvmrp/2.3.4.5/4.4.2.3#

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