Ip igmp proxy – LevelOne GTL-2691 User Manual
Page 1271
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HAPTER
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| Multicast Filtering Commands
IGMP Proxy Routing
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To enable IGMP proxy service, follow these steps:
1.
Use the
command to enable IP multicasting
globally on the router.
2.
command to enable IGMP proxy on the upstream
interface that is attached to an upstream multicast router.
3.
Use the
command to enable IGMP on the downstream
interfaces from which to forward IGMP membership reports.
4.
Optional – Use the
ip igmp proxy unsolicited-report-interval
command
to indicate how often the system will send unsolicited reports to the
upstream router.
ip igmp proxy
This command enables IGMP proxy service for multicast routing,
forwarding IGMP membership information monitored on downstream
interfaces onto the upstream interface in a summarized report. Use the no
form to disable proxy service.
S
YNTAX
[no] ip igmp proxy
D
EFAULT
S
ETTING
Disabled
C
OMMAND
M
ODE
Interface Configuration (VLAN)
C
OMMAND
U
SAGE
◆
When IGMP proxy is enabled on an interface, that interface is known as
the upstream or host interface. This interface performs only the host
portion of IGMP by sending IGMP membership reports, and
automatically disables IGMP router functions.
◆
Interfaces with IGMP enabled, but not located in the direction of the
multicast tree root are known as downstream or router interfaces.
These interfaces perform the standard IGMP router functions by
maintaining a database of all IGMP subscriptions on the downstream
interface. IGMP must therefore be enabled on all downstream
interfaces which require proxy multicast service.
◆
When changes occur in the downstream IGMP groups, a IGMP state
change report is created and sent to the upstream router.
◆
If there is an IGMPv1 or IGMPv2 querier on the upstream network, then
the proxy device will act as an IGMPv1 or IGMPv2 host on the upstream
interface accordingly. Otherwise, it will act as an IGMPv3 host.
◆
Multicast routing protocols are not supported on interfaces where IGMP
proxy service is enabled.