Having some issues with multicast traffic. We use a basic informa-cast paging server with our voip environment. The paging has stopped working for one branch site. As I was taking a look at some basic multicast troubleshooting. Here are some things I noticed...
An idea of the network.
Each branch site has a L3 switch connected to ISR4331 running iWAN(DMVPN/mGRE tunnels) back to hubs/other spokes
Both switch and router are configured for pim sparse mode
! global config#
ip pim autorp listener
ip pim register-source Loopback0
! and switch interface commands for SVI, Loopback and links to router, router interfaces - loopback, tunnels, LAN
ip pim sparse-mode
The data center core L3 switch has this global config#
ip pim autorp listener
ip pim send-rp-announce Loopback0 scope 255
ip pim send-rp-discovery Loopback0 scope 255
ip pim register-source Loopback0
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! When I run "sh ip pim rp mapping" on the router at the affected branch I see a mapping as I'd expect
R01#sh ip pim rp mapping
PIM Group-to-RP Mappings
Group(s) 224.0.0.0/4
RP 10.200.255.252 (?), v2v1
Info source: 10.200.255.252 (?), elected via Auto-RP
Uptime: 12w5d, expires: 00:02:47
! On the switch for the affected site I see no mapping, I think this is my problem but don't know why it wouldn't be mapping or what to do about it:
s01#sh ip pim rp mapping
PIM Group-to-RP Mappings
ms01#
On a branch switch where it is working, it shows the RP mapping
ls01#sh ip pim rp mapping
PIM Group-to-RP Mappings
Group(s) 224.0.0.0/4
RP 10.200.255.252 (?), v2v1
Info source: 10.200.255.252 (?), elected via Auto-RP
Uptime: 15:54:29, expires: 00:02:11
ls01#
*The only thing I can figure is I may be hitting a bug as I just recently upgraded the affected 4506E switch to 15.2(2)E6 (a couple weeks ago) before the issue started occurring.
Any helpful thoughts/suggestions are welcome. Thanks!
