Excluding Well-Known Or Reserved Multicast Addresses From Ip Multicast Filtering - HP ProCurve 5300xl Series Management Manual

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Multimedia Traffic Control with IP Multicast (IGMP)

Excluding Well-Known or Reserved Multicast Addresses from IP Multicast Filtering

Excluding Well-Known or Reserved

Multicast Addresses from IP Multicast

Each multicast host group is identified by a single IP address in the range of

224.0.0.0 through 239.255.255.255. Specific groups of consecutive addresses

in this range are termed "well-known" addresses and are reserved for pre-

defined host groups. IGMP does not filter these addresses, so any packets the

switch receives for such addresses are flooded out all ports assigned to the

VLAN on which they were received (except the port on which the packets

entered the VLAN).

The following table lists the 32 well-known address groups (8192 total

addresses) that IGMP does not filter on the Series 5300XL switches, as well

as on the 1600M, 2400M, 2424M, 2650M, 4000M, 4100GL, 6108M, 8000M, and

Series 2500 switches.

Table 4-2.IP Multicast Address Groups Excluded from IGMP Filtering

Groups of Consecutive

Addresses in the Range of

224.0.0.X to 239.0.0.X*

* X is any value from 0 to 255.

Groups of Consecutive

Addresses in the Range of

224.128.0.X to 239.128.0.X*

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