Dasan V5808 - Disabling Verification of Source IP of IGMP Packets; Specifying IGMP Report;Leave’s Source IP Address

User Manual UMN:CLI
V5808
437
To set the current IGMP IF credit as the default (100), use the following command.
Command
Mode
Description
clear ip igmp if flap discredit
[NAME]
Enable
Global
Restores the current credit to a default value (100).
NAME: IGMP interface name
9.2.8.5 Disabling Verification of Source IP of IGMP Packets
RPF (Reverse Path Forwarding) Check is basic operation to correctly forward multicast
traffic down the distribution tree. A multicast router checks if the packet is received on the
interface it would used to forward a unicast packet back to the source. If the RPF check is
successful, the packet is forwarded. Otherwise, it is dropped.
However, IGMP Proxy switches do not perform RPF check on multicast traffic and only
can verify if IGMP packets are received from connected network.
To disable the IGMP packet’s source IP verification function, use the following command.
Command
Mode
Description
no ip igmp verify-sip
Global
Forwards IGMP packets without the source IP
verification.
ip igmp verify-sip
Forwards IGMP packets after the source IP verification.
If the source IP address is not within the incoming
network segment, the packets are discarded. (default).
9.2.8.6 Specifying IGMP Report/Leave’s Source IP Address
In IGMP proxy operation, the switch interacts with the router on its upstream interface
through the exchange of IGMP messages on behalf of hosts and acts as the proxy. It
performs the host portion of the IGMP task on the upstream interface by replacing the
source IP address of IGMP messages, a membership report and leave group, with its
own.
To specify the source IP address of IGMP membership report and leave group messages
that is sent by IGMP proxy-service (upstream) interface, use the following command.
Command
Mode
Description
ip igmp proxy-service sip
{A.B.C.D | first-reporter}
Interface
Configures the source IP address of IGMP
membership report and leave group messages that is
sent by proxy-service interface.
A.B.C.D: Source IP address that manually entered by
user
first-reporter: Source IP address of the host that sent
the first IGMP membership report.
last-reporter: Source IP of the host that sent the last
IGMP membership report.
(Default : proxy-service interface IP address)
no ip igmp proxy-service sip
Removes the source IP configuration for IGMP
membership report and leave group messages.