I have an issue with multicast MOH, that seems to be related to the voicegateway. I am running a 2951 c2951-universalk9-mz.SPA.153-3.M6. in conjunction with CUCM 10.0. I can see that when a phone is being put in hold, the correct multicast address 239.1.1.5 is used (see debug below) but the MOH file is never played out.
TOPOLOGY:
voicegateway connected to layer 3 switch, phone connected to same Layer 3switch, but different subnet.
Voicegateway configuration, MOH related
interface GigabitEthernet0/0
ip address 10.61.1.201 255.255.255.0
ip pim sparse-mode
ip multicast boundary 2
duplex auto
speed auto
call-manager-fallback
max-conferences 8 gain -6
transfer-system full-consult
moh "CaribbeanBlue.wav"
multicast moh 239.1.1.5 port 16384 route 10.61.1.201
ccm-manager music-on-hold bind GigabitEthernet0/0
ip multicast-routing
on SW1:
interface Vlan11 (voicegateway, MOH, connected to this L3 interface)
ip address 10.61.1.11 255.255.255.0
ip helper-address 10.61.2.50
no ip redirects
ip pim sparse-mode
end
interface Vlan40 (Phone, being put on hold, connected to this L3 interface)
ip address 10.61.4.11 255.255.255.0
ip helper-address 10.61.2.50
no ip redirects
ip pim sparse-mode
end
debug ip mrouting, when putting a phone on hold:
sw1#
Oct 26 23:57:11: MRT(0): Update (*,239.1.1.5), RPF /0.0.0.0
Oct 26 23:57:11: MRT(0): Set the C-flag for (*, 239.1.1.5)
Oct 26 23:57:11: MRT(0): WAVL Insert interface: Vlan40 in (* ,239.1.1.5) Successful
Oct 26 23:57:11: MRT(0): set min mtu for (0.0.0.0, 239.1.1.5) 18010->1500
Oct 26 23:57:11: MRT(0): Add Vlan40/239.1.1.5 to the olist of (*, 239.1.1.5), Forward state - MAC not built
Oct 26 23:55:35: PIM(0): Building Triggered (*,G) Join / (S,G,RP-bit) Prune message for 239.1.1.5
Above shows a join request on interface vlan40, where the phone is L3 connected.
sw1#sh ip mroute
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
L - Local, P - Pruned, R - RP-bit set, F - Register flag,
T - SPT-bit set, J - Join SPT, M - MSDP created entry,
X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
U - URD, I - Received Source Specific Host Report,
Z - Multicast Tunnel, z - MDT-data group sender,
Y - Joined MDT-data group, y - Sending to MDT-data group
V - RD & Vector, v - Vector
Outgoing interface flags: H - Hardware switched, A - Assert winner
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(*, 239.1.1.5), 00:02:34/00:02:23, RP 0.0.0.0, flags: SJC <------------------------------------------239.1.1.5 is what is configured on the VGW, and the phone is using the right multicast address
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Vlan40, Forward/Sparse, 00:00:57/00:02:23
(*, 239.255.255.253), 19:37:40/00:02:17, RP 0.0.0.0, flags: SP
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list: Null
No where can I see that the IP address 10.61.1.201 (VGW) has actually joined the 239.1.1.5 multicast group as the source.
I have removed the call-manager-fallback config in its entirety and performed a reboot, but cannnot get the VGW to become the source for 239.1.1.5 and until then, MOH will not play out.
one interesting thing i noticed is:
voipgw#sh ephone summ
hairpin_block:
Max 0, Registered 0, Unregistered 0, Deceased 0 High Water Mark 0, Sockets 0
ephone_send_packet process switched 0
Max Conferences 77 with 0 active (8 allowed)
-------------------------------------
Skinny Music On Hold Status - group 0
Active MOH clients 0 (max 1300), Media Clients 0, B-ACD Clients 0
No MOH file loaded <-----------------------------------------------------------------??
as it definitely loaded into flash:
5 -rw- 41992652 Apr 29 2014 10:35:42 +10:00 CaribbeanBlue.wav
Before I TAC this, any ideas?
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