Full Scale Lab 3 - Task 6.2 Multicast Connecttivity

I spent a few hours mucking around with this only to find that my solution was exactly like the one posted.  In the real lab that would be game set and match of course, but I'm wondering if the CSR 1000vs have an issue here or whether it's operator error. :P

I am having an SPT switchover issue it seems from R6/R7.  If I disable with ip pim spt-threshold infinity I get consistent pings the entire time.

Checking routing and path on R6 I have a good RPF check all the way back to the sender.

R6#show ip route multicast 119.3.192.21

 

Routing Table: multicast

Routing entry for 119.3.192.0/24

  Known via "eigrp 6000", distance 170, metric 26368

  Tag 0.0.7.208, type external, 

   replicated from topology(default)

  Last update from 192.0.69.9 on GigabitEthernet1.69, 12:02:22 ago

  Routing Descriptor Blocks:

  * 192.0.69.9 (default), from 192.0.69.9, 12:02:22 ago, via GigabitEthernet1.69

      Route metric is 26368, traffic share count is 1

      Total delay is 30 microseconds, minimum bandwidth is 100000 Kbit

      Reliability 255/255, minimum MTU 1500 bytes

      Loading 1/255, Hops 2

      Route tag 0.0.7.208

R6#

R6#mtrace 119.3.192.21

Type escape sequence to abort.

Mtrace from 119.3.192.21 to 192.0.69.6 via RPF

From source (?) to destination (?)

Querying full reverse path... 

 0  192.0.69.6

-1  192.0.69.6 ==> 192.0.69.6 PIM  [119.3.192.0/24]

-2  192.0.69.9 ==> 192.0.59.9 PIM_MT  [119.3.192.0/24]

-3  192.0.59.5 ==> 100.10.50.5 PIM_MT  [119.3.192.0/24]

-4  100.10.50.1 ==> 119.3.0.1 PIM  [119.3.192.0/24]

-5  119.3.0.19 ==> 119.3.192.19 PIM_MT  [119.3.192.0/24]

-6  119.3.192.21 

 

I'm not really sure where to look at this point so any help is appreciated.  

 

-Bill

Comments

  • Must have been an issue with the CSRs because it started working after saving and reloading.

    Should have tried that first but I hate not knowing why it wasn't working prior to the reload.

  • The only known issue (there is a bug ID for it) with the CSRs and multicast is multicast forwarding over mGRE tunnels. Other than that, I have not heard of anything CSR specific. 

     

  • The same thing happened to me.  Everything was right...just had to reload.

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