10 GbE Gateway
(sRB-20210G Module) User Manual
Version 2.0
111
Mellanox Technologies
Chapter 11.
Multicast Settings
This chapter provides instructions on how to configure a multicast group to either send a
packet onto the InfiniBand side or drop it.
11.1
Overview
This section introduces the feature that supports multicast. This feature allows configuring the
fabric behavior in case the multicast packet arrives from the Ethernet side but a multicast
group for this packed does not exist on the InfiniBand side. In such case, the packet that
arrived can either be dropped or it can be forwarded to a user-defined default multicast group.
11.2
Definitions
11.3
Multicast Settings
To configure multicast:
Step 1
Run a default-multicast-group show command to view the group IP and the chosen action.
10G-Card(config-multicast)# default-multicast-group show
default multicast group ip is 224.0.0.1
default multicast group action is drop
Step 2
Set the desired action (drop or send).
sRB-20210G-6060(config-multicast)#
Step 3
Set the multicast group IP address:
224.0.0.10
Step 4
Run a default-multicast-group show command to view the results.
sRB-20210G-6060(config-multicast)#
default multicast group ip is 224.0.0.1
default multicast group action is send
Note that the default multicast group ip did not change; changes will only be applied after reboot.
multicast
Multicast is an IP feature that refers to single packets copied by the network and sent to a
specific subset of network addresses. These addresses are specified in the Destination
Address Field. Compare with
broadcast transmission
and
unicast transmission
.
multicast
address
A multicast address is a single address that refers to multiple network devices. Synonymous
with group address. Compare with broadcast address and Unicast address. See also
multicast
.
multicast
router
A multicast router is used to send IGMP query messages on attached local networks. Host
members of a multicast group respond to a query by sending IGMP reports noting the
multicast groups to which they belong. The multicast router takes responsibility for forwarding
multicast datagram from one multicast group to all other networks that have members in the
group. See also
IGMP
.
