Category Archives: Cisco Routing & Switching

Multicast TTL-Threshold

By | December 30, 2021

As per books, The TTL of a packet must be higher than the threshold to be forwarded. From the 12.4 command reference: “Only multicast packets with a TTL value greater than the threshold are forwarded out the interface.” As per guidelines Below is our topology: R1—-R2—-R3—-R4 PIM-DM is enabled everywhere. R4 has joined 239.0.0.1 R1… Read More »

Messin Around With Multicast Boundary

By | December 30, 2021

We will check below some multicast commands and how these works: We will use below topology: R5—R6—R1—R2—R3—R4 R1 = MA and RP for 232/8, 233/8, 234/8 R4 has the following on interface loopback 0: R3 has set up a multicast boundary as follows: Now R3 only allows PIM joins that are in 232/8 or 233/8.… Read More »