User Guide for IGMPv3 Configuration
Source Specific Multicast for DMP4310G
Revised: April 29, 2015
•
About This Guide, page 1
•
Network Configuration, page 3
•
Configuring the DMP for SSM, page 5
About This Guide
Note
When the multicast router is operating in IGMPv2 mode, DMP 4310G will use IGMP v2 by default.
This guide goes through the configuration steps for enabling IGMPv3 Source Specific Multicast (SSM)
in a digital signage deployment utilizing Cisco DMP4310G devices. It assumes that you have already
completed setup procedures for your DMP, and therefore:
•
Your DMP is already connected to:
– A network that includes a DHCP server – unless your DMP will use pseudo-IP addressing.
– Its LCD display (or equivalent).
– Its AC power source.
•
You Already:
– Checked the LEDs to confirm that your DMP has power and has obtained an IP address.
– Learned what dynamic IP address the DHCP server assigned to your DMP.
– Used your browser to log in to the DMPDM administrative account.
– Changed the factory-default passwords.
– Used DMPDM to configure video output to the presentation system.
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About This Guide
Caution
Are any of the preceding statements not yet true for you? If so, you must set up your DMP before
using this guide. See: http://www.cisco.com/en/US/products/ps7220/prod_installation_guides_list.html
User Guide for IGMPv3 Configuration Source Specific Multicast for DMP4310G
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Network Configuration
Network Configuration
Note
Network topologies will vary from one organization to another. In addition to the SSM configurations
defined below, there may or may not be additional routing and switching configurations required on the
network for proper SSM configuration.
Tip
For additional information on Source Specific Multicast configuration, see the following chapter from
the Cisco ISO IP Configuration Guide:
http://www.cisco.com/en/US/docs/ios/12_2/ip/configuration/guide/1cfssm.html
Procedure
Step 1
Note
Step 2
Configure the sending (broadcasting) source with the desired multicast IP address.
A local-scope multicast IP address in the range of 232.0.0.0/8 should be used. The administratively
scoped IPv4 multicast address range of 239.0.0.0/8 range may also be used. Reserved addresses that
include (but not limited to) the following ranges must be avoided: 224.0.0.0 – 224.0.0.255 (reserved for
local network control) and 224.0.1.0 – 224.0.1.255 (reserved for internetwork control).
Configure the routers involved in the multicast network to have a time-to-live (TTL) value of greater
than 3.
Router(config-if)# ip multicast ttl-threshold 4
Step 3
All router interfaces involved should be configured for PIM Sparse-Mode.
Router(config-if)# ip pim sparse-mode
Note
Step 4
Spare-Dense-Mode can also be used depending on your topology (Sparse-Mode is more common).
Enable PIM SSM default on all routers involved in the multicast.
Router(config)# ip pim ssm default
Note
Step 5
You can also alternatively identify a range using a command such as: ip pim ssm range <access-list>
Enable IGMP version 3 on all client facing network interfaces.
Router(config-if)# ip igmp version 3
Step 6
Verify and check the traffic on the routers involved in the multicast (typically the router closest to the
multicast source).
Router(config-if)# sh ip mroute
User Guide for IGMPv3 Configuration Source Specific Multicast for DMP4310G
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Network Configuration
Note
The snooping switch connected to the IGMP querier router should be configured in the following manner
depending upon the model of the Cisco switch:
- If it is a Cisco Catalyst 6k or 4k switch - enable IGMP snooping on the switch using the following
command:
Router(config)# ip igmp snooping
- If it is a Cisco Catalyst 3k or 2k switch - isolate the network for receiving only v3 packets through
the use of VLAN and disable IGMP snooping on the switch using the following command:
Router(config)# no ip igmp snooping
Step 7
Stop. You have completed this procedure.
User Guide for IGMPv3 Configuration Source Specific Multicast for DMP4310G
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Configuring the DMP for SSM
Configuring the DMP for SSM
Note
It is helpful to turn on debugging for the router closest to the multicast source to verify that the multicast
traffic is being properly received.
Router(config-if)# debug ip igmp
Step 1
Configure (enable) the DMP for IGMPv3 by issuing the following MIB command string from a web
browser – be sure to input the IP address of your DMP.
https://<ip of dmp>/set_param?init.force_igmp_version=3
Tip
If there are a large number of DMP devices to be configured, this MIB command may be more efficiently
issued through a custom-created Advanced Task through the DMM interface. Once created, this
Advanced Task can be issued to entire groups of DMPs.
Step 2
Log into the DMPDM of a DMP as an administrator by using a web browser and the IP address of the
DMP.
Step 3
Save and Restart the DMP in order save/preserve the IGMPv3 setting. If this step is not performed, the
DMP will revert back to IGMPv2 (default setting) upon the next reboot.
Step 4
Select Media Playback from the left-hand column of settings within the DMPDM.
User Guide for IGMPv3 Configuration Source Specific Multicast for DMP4310G
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Configuring the DMP for SSM
Step 5
From the Protocol drop-down menu, select either udp:// or rtp:// as the desired protocol.
Step 6
Fill in the Multicast Group IP Address with the multicast address of the broadcast source.
Step 7
Fill in the Group Port Number with the port number of the multicast.
Step 8
Fill in the Source IP Address if available.
Note
If the Source IP Address field is inaccessible, it is because the DMP has not been properly enabled for
IGMPv3. You must return to Step 1 and issue the MIB command to enable IGMPv3 before you will have
access to configure this field.
Step 9
Click on the Start button. The multicast media stream should now be playing on the connected display.
Step 10
Verify and check the traffic on the routers involved in the multicast (typically the router closest to the
multicast source)
router(config-if)# sh ip mroute ssm
Step 11
To stop the multicast media stream, simply click on the Stop button.
Step 12
Stop. You have completed this procedure.
User Guide for IGMPv3 Configuration Source Specific Multicast for DMP4310G
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