nanog mailing list archives
IP Multicast Persistent Duplicate Packet Issue
From: Roman Islam <romislam () gmail com>
Date: Wed, 6 Apr 2022 17:25:38 +1000
Hi Everyone, Has anyone experienced a TETRA Radio application issue if underlying IP multicast transport sends persistent duplicate packets? Here is my scenario as below: PIM is running on the MPLS L3 VPN environment. C multicast is running on a single VRF (TETRA) only. Source is running behind a dual home PE. HSRP, PIM DR path is via PE1 to the source. Anycast RP is configured with PE1 & PE2. On the receiver side there is a single PE. When I check (S,G) route on the receiver side PE default MDT is working as expected. After the threshold exceeds it switches to the data MDT. PIM Assert mechanism winner is PE2 though (Since PE 2 has the highest IP and source is behind dual home PE with equal cost I guess). Can this be a reason for persistent duplicate multicast packets at the receiver side; since the assert winner is PE2 but HSRP, PIM DR path is via PE1 to the source? If this is the case is there any way to manually configure the assert winner to PE1? Roman
Current thread:
- IP Multicast Persistent Duplicate Packet Issue Roman Islam (Apr 06)
- Re: IP Multicast Persistent Duplicate Packet Issue Jared Mauch (Apr 06)
- Re: IP Multicast Persistent Duplicate Packet Issue Roman Islam (Apr 06)
- Re: IP Multicast Persistent Duplicate Packet Issue Jared Mauch (Apr 06)
- Re: IP Multicast Persistent Duplicate Packet Issue Roman Islam (Apr 06)
- Re: IP Multicast Persistent Duplicate Packet Issue Jared Mauch (Apr 06)