About Mitrixsen

Mitrixsen · 05-09-2026

Hello, everyone.I have some questions about the AutoRP mRIB entries that are created for 224.0.1.39/40.When a router is enabled for multicast routing, it automatically joins 224.0.1.40 (which is used to announce the RP mappings). However, we still ha...

Mitrixsen · 05-08-2026

Hi, everyone.This is my topology again.I've configured ip pim spt-threshold infinity on R7. This means that it will never switch to a direct SPT between it and the source.Here is how the mRIB looks like on R1-RPMy question is, if R1 receives a packet...

Mitrixsen · 05-04-2026

Hello, everyone.This is my multicast PIM Sparse-Mode topology. The prefixes for the router links are based off the router names, for ex the link between R5 and R1-XR is 192.168.51.0/24.R1 is the RP.I have a multicast source at the bottom that will tr...

Mitrixsen · 04-18-2026

Hello, everyone.I've enabled and configured a querier (R1-XR) for IGMP in my lab.The XR router started sending membership reports to all these IPs Now compare this with an IOS-XE Querier. It only sends 2 reports, out of which one is AutoRPWhy does IO...

Mitrixsen · 04-18-2026

Hello, everyone.I've started studying IOS-XR Multicast and I have some questions.First of all, is it not possible on XR to only enable IGMP on an interface? I basically had to do all this to get IGMP working:router igmp interface GigabitEthernet0/0/0...

Mitrixsen · 02-25-2026

Hello M02@rt37 The original intention behind AS_SET was to preserve the AS information and prevent potential forwarding loops. If AS_SET is not used, how can they be mitigated? Could they even occur in the first place? David

Mitrixsen · 02-24-2026

Hello Martin, I've read that chapter too actually to figure AS_SET out. The thing is, if Sugarbush did aggregate those prefixes and send them to Burke, if one of the specific /24 prefixes went down, Sugarbush wouldn't use the /21 prefix that it is r...

Mitrixsen · 02-24-2026

Hello, AS 810 will have a Null0 route installed for the summary. As long as any prefixes within that AS live, they are matched by the specific routes. If a prefix dies, it ends up being matched by the Null0 route is dropped therefore there shouldn't ...

Mitrixsen · 02-24-2026

Hello, It's present by default on my routers when I configure it via aggregate-address. David

Mitrixsen · 02-09-2026

Hello. I've commited the configuration before rebooting the device. David

Member Since	‎01-11-2022 07:57 AM
Date Last Visited	‎05-12-2026 05:54 PM
Posts	218
Total Helpful Votes Received	33

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PIM AutoRP entries in the mRIB

Source-Based Entries versus Shared Entries and Pruning

In PIM Sparse-Mode, how does a new receiver join the SPT?

IOS-XR Membership Reports

IGMP and PIM on IOS-XR

Re: How can the lack of AS_SET cause routing loops?

Re: How can the lack of AS_SET cause routing loops?

Re: How can the lack of AS_SET cause routing loops?

Re: How can the lack of AS_SET cause routing loops?

Re: BGP Router-ID Selection on IOS-XR