All the routers are configured with PIM Dense Mode and OSPF.
PC1 is generating multicast data flow x.x.x.x and PC2 PC3 receive that multicast. They send IGMP join packet to the routers (PC2 to R2 and PC3 to R4).
The strange behaviour that I noted is the follow:
I simulated a fault disconnecting SW1 (switch off): on R2 and R4 I observed that "Expires time" of multicast route ("show ip mroute") is setted to 3 minutes and started the countdown. I expected that after 3 minutes the multicast route disappeared from multicast routing table but that is not happened; because after a random time the timer during the countdownad restarts again from 3 minutes and the countdown starts again. After 3 minutes the "Expires time" arrives finally to zero and the multicast route disappear from routing table.
Someone could help to find out the event that restart the expires timer to 3 minutes?
- PC1 is the only device that send multicast packets
- PC2 and PC3 are only receiver, they just send IGMP joint group messages
- All routers are configured with PIM-DM without any static igmp configuration
- I runned "debug ip pim x.x.x.x" on R2 and R4 but PIM messages are not related with timer restarting. I noted that the timer was resetted to 3 minutes without receiving any PIM packets
- I runned "debug ip igmp x.x.x.x" on R2 and R4 but IGMP packets are not related with timer restarting. I noted that the timer was resetted to 3 minutes without receiving any IGMP packets.
I hope I have made myself clear with the explaination of that issue.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.