Support Support Downloads Knowledge Base Juniper Support Portal Community

Knowledge Base

Search our Knowledge Base sites to find answers to your questions.

Ask All Knowledge Base Sites All Knowledge Base Sites JunosE Defect (KA)Knowledge BaseSecurity AdvisoriesTechnical BulletinsTechnotes Sign in to display secure content and recently viewed articles

Multicast stream started but not seeing an entry in PIM JOIN database on source DR.



Article ID: KB11118 KB Last Updated: 11 Mar 2009Version: 1.0

After starting a multicast application,  no {* , G} entry is found in the PIM JOIN database nor is there an IGMP entry for the group in-question.  Is this an application issue?


It is common practice for developers to design multicast applications without taking into consideration that these packets will be routed. As a result, the Time To Live (TTL) value in the packets are set to 1.

The JUNOS Routing Engine will decrement the TTL and thus reject these packets with a TTL expired message.


To workaound the issue, increase the TTL in the generated packets.

Comment on this article > Affected Products Browse the Knowledge Base for more articles related to these product categories. Select a category to begin.

Getting Up and Running with Junos

Getting Up and Running with Junos Security Alerts and Vulnerabilities Product Alerts and Software Release Notices Problem Report (PR) Search Tool EOL Notices and Bulletins JTAC User Guide Customer Care User Guide Pathfinder SRX High Availability Configurator SRX VPN Configurator Training Courses and Videos End User Licence Agreement Global Search