
Configuring IP Multicasting Services
A-8 114064 Rev. A
Parameter: Metric
Path: Configuration Manager > Protocols > IP > Multicast > DVMRP > Circuit
Default: 1
Options: 1 to 31
Function: Specifies the cost of this interface.
Instructions: Determine the cost that you want to assign to this hop and enter a value. We
recommend the following values: for a LAN, or tunnel across a single LAN, 1;
for a multihop tunnel, 2 or 3; for a serial link, or tunnel across a serial link, 1; for
a backup tunnel, the primary tunnel metric + 1.
MIB Object ID: 1.3.6.1.4.1.18.3.5.3.12.2.1.6
Parameter: Threshold
Path: Configuration Manager > Protocols > IP > Multicast > DVMRP > Circuit
Default: 1 hop
Options: 1 to 254 hops
Function: Specifies a time to live (TTL) value for the interface. This value is the minimum
IP TTL required for a multicast datagram to be forwarded out this interface.
Instructions: Use this parameter to control the scope of the datagrams. If the IP TTL is less
than the threshold value you specify, the datagram is dropped by the router.
MIB Object ID: 1.3.6.1.4.1.18.3.5.3.12.2.1.7
Parameter: Forward Cache Size
Path: Configuration Manager > Protocols > IP > Multicast > DVMRP > Circuit
Default: 32
Options: 32 to 512 entries
Function: Specifies the maximum number of entries allowed in the forwarding table
associated with this interface.
Instructions: When configuring a cache size, you must also keep in mind the TTL value for
entries. If you specify a large cache size, a larger TTL value is recommended. For
a smaller cache, a shorter TTL for cache entries is recommended.
MIB Object ID: 1.3.6.1.4.1.18.3.5.3.12.2.1.14
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