User Manual

Routing
330
M6100 Web Management User Guide
Multicast
The NETGEAR ProSafe Managed Multicast component is best suited for video and audio
traffic requiring multicast packet control for optimal operation. The Multicast component
includes support for IGMPv2 and IGMPv3. Communication from point to multipoint is called
Multicasting. The source host (point) transmits a message to a group of zero or more hosts
(multipoint) that are identified by a single IP destination address. Although the task may be
accomplished by sending unicast (point-to-point) messages to each of the destination hosts,
multicasting is the more desirable method for this type of transmission. A multicast message
is delivered to all members of its destination host group with the same best-efforts reliability
as regular unicast IP messages. The message is not guaranteed to arrive intact at all
members of the destination group or in the same order relative to other messages.
The Routing > Multicast folder contains links to the following web pages that you use to
configure and display Multicast data:
• Multicast Mroute Table on page 331
State Transitioned to Master The total number of times that this virtual router's state has transitioned to
Master.
Advertisement Received The total number of VRRP advertisements received by this virtual router.
Advertisement Interval Errors The total number of VRRP advertisement packets received for which the
advertisement interval was different than the one configured for the local
virtual router.
Authentication Failure The total number of VRRP packets received that did not pass the
authentication check.
IP TTL Errors The total number of VRRP packets received by the virtual router with IP
Time-To-Live (TTL) not equal to 255.
Zero Priority Packets Received The total number of VRRP packets received by the virtual router with a
priority of 0.
Zero Priority Packets Sent The total number of VRRP packets sent by the virtual router with a priority of
0.
Invalid Type Packets Received The number of VRRP packets received by the virtual router with an invalid
value in the Type field.
Address List Errors The total number of packets received for which the address list does not
match the locally configured list for the virtual router.
Invalid Authentication Type The total number of packets received with an unknown authentication type.
Authentication Type Mismatch The total number of packets received with an authentication type different to
the locally configured authentication method.
Packet Length Errors The total number of packets received with a packet length less than the
length of the VRRP header.
Field Description