We are currently trying to get a multicast setup to work, but to no avail. Below the setup of the configuration.
################## ##############
multicast source <--> gi0/0/0 # Cisco ISR 2911 # gi0/0 <--> gi2/0/12 # Cisco 3750 # --> connected in a star to several 2960 switches
################## # IP Base #
##############
The router has a separate VRF for the multicast connections, which includes the interfaces gi0/0 and gi0/0/0, both L3 interfaces. Static routing is configured for the multicast
source and the networks defined on the 3750 switch. The multicast source entries are learned by IGMP v3 and PIM-SM is configured on both interfaces. The router is further configured as static RP for it's gi0/0 interface.
The 3750 switch uses PIM stub routing for the multicast routing. Interface gi2/0/12 is configured as sparse-dense mode and the SVI interfaces for the MC receivers are configured as passive mode. IGMP snooping is enabled on the SVI interfaces and build the tree with the help of IGMPv3 reports and join messages. The PIM routing and IGMP subscription looks fine, but the receivers do not revceive the stream.
An ip packet debug on the switch reveals the following output, which likely indicates the stream cannot be correctly routed:
Sep 14 09:12:28.556: FIBipv4-packet-proc: route packet from GigabitEthernet2/0/12 src 10.18.15.23 dst 239.232.223.21
Sep 14 09:12:28.564: FIBfwd-proc: Default:224.0.0.0/4 multicast entry
Sep 14 09:12:28.564: FIBipv4-packet-proc: packet routing failed
Sep 14 09:12:28.564: FIBipv4-packet-proc: route packet from GigabitEthernet2/0/12 src 10.18.15.23 dst 239.232.223.21
Sep 14 09:12:28.564: FIBfwd-proc: Default:224.0.0.0/4 multicast entry
Sep 14 09:12:28.564: FIBipv4-packet-proc: packet routing failed
Sep 14 09:12:28.564: FIBipv4-packet-proc: route packet from GigabitEthernet2/0/12 src 10.18.15.23 dst 239.232.223.21
Sep 14 09:12:28.564: FIBfwd-proc: Default:224.0.0.0/4 multicast entry
Sep 14 09:12:28.564: FIBipv4-packet-proc: packet routing failed
Does anybody have any clue what the cause could be of this behavior?
######################
# Cisco 2911 Router relevant configuration
ip vrf IPTV
ip multicast-routing vrf IPTV
class-map type multicast-flows classMapTelenetMulticastIPs
group 239.232.209.1 to 239.232.209.254 source 10.18.15.23
group 239.232.223.1 to 239.232.223.254 source 10.18.15.23
exit
interface GigabitEthernet0/0
description IPTV_L3portCSW1-gi2/0/12
ip vrf forwarding IPTV
ip address 172.28.20.129 255.255.255.252
ip pim sparse-mode
duplex full
speed 1000
exit
interface GigabitEthernet0/0/0
ip vrf forwarding IPTV
ip address 195.130.130.242 255.255.255.240
ip pim sparse-mode
ip igmp static-group class-map classMapTelenetMulticastIPs
ip igmp version 3
duplex full
speed 1000
media-type rj45
exit
ip pim vrf IPTV rp-address 172.28.20.129
ip pim vrf IPTV register-source GigabitEthernet0/0/0
ip pim vrf IPTV ssm default
ip route vrf IPTV 0.0.0.0 0.0.0.0 Null0 name defRouteBlackHole
ip route vrf IPTV 10.18.15.23 255.255.255.255 GigabitEthernet0/0/0 195.130.130.241 name IPTV-BCC-source
ip route vrf IPTV 10.20.16.0 255.255.240.0 GigabitEthernet0/0 172.28.20.130 name IPTV-Receivers
#####
# Cisco 2911 Router output
RTR2#sh ip mroute vrf IPTV 239.232.209.21
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, E - Extranet,
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
(*, 239.232.209.21), 01:07:41/00:03:13, RP 172.28.20.129, flags: SJC
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
GigabitEthernet0/0, Forward/Sparse, 00:02:30/00:03:13
GigabitEthernet0/0/0, Forward/Sparse, 01:07:41/00:01:17
(10.18.15.23, 239.232.209.21), 01:07:41/00:01:37, flags: T
Incoming interface: GigabitEthernet0/0/0, RPF nbr 195.130.130.241
Outgoing interface list:
GigabitEthernet0/0, Forward/Sparse, 00:02:30/00:03:15
##
RTR2#sh ip mfib vrf IPTV active
Active Multicast Sources - sending >= 4 kbps
VRF IPTV
Group: 239.232.209.21
Source: 10.18.15.23,
SW Rate: 938 pps/9850 kbps(1sec), 3435 kbps(last 4111 sec)
##
RTR2#sh ip mroute vrf IPTV 239.232.209.21 count
Use "show ip mfib count" to get better response time for a large number of mroutes.
IP Multicast Statistics
593 routes using 339394 bytes of memory
510 groups, 0.16 average sources per group
Forwarding Counts: Pkt Count/Pkts per second/Avg Pkt Size/Kilobits per second
Other counts: Total/RPF failed/Other drops(OIF-null, rate-limit etc)
Group: 239.232.209.21, Source count: 1, Packets forwarded: 25131, Packets received: 31026
RP-tree: Forwarding: 0/0/0/0, Other: 0/0/0
Source: 10.18.15.23/32, Forwarding: 25131/939/1344/10104, Other: 31026/0/5895
######################
# Cisco 3750 Switch relevant configuration
ip multicast-routing distributed
interface GigabitEthernet2/0/12
description IPTV_L3portRTR2-gi0/0
no switchport
ip address 172.28.20.130 255.255.255.252
ip pim sparse-mode
exit
interface Vlan720
description IPTV-receivers
ip address 10.20.20.1 255.255.255.0
ip helper-address 10.1.5.210
ip helper-address 10.20.5.210
ip pim passive
ip igmp version 3
exit
ip pim rp-address 172.28.20.129
ip pim ssm default
ip route 10.18.15.23 255.255.255.255 GigabitEthernet2/0/12 172.28.20.129 name IPTV-BCC-via-RTR2_gi0/0
ip route 195.130.130.240 255.255.255.240 GigabitEthernet2/0/12 172.28.20.129 name IPTV-via-RTR2_gi0/0
#####
# Cisco 3750 Switch output
CSW1#show ip mroute 239.232.209.21
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, E - Extranet,
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
(*, 239.232.209.21), 00:32:51/stopped, RP 172.28.20.129, flags: SJC
Incoming interface: GigabitEthernet2/0/12, RPF nbr 172.28.20.129
Outgoing interface list:
Vlan720, Forward/Sparse-Dense, 00:01:31/00:02:57
(10.18.15.23, 239.232.209.21), 00:32:51/00:02:57, flags: JT
Incoming interface: GigabitEthernet2/0/12, RPF nbr 172.28.20.129
Outgoing interface list:
Vlan720, Forward/Sparse-Dense, 00:01:31/00:02:57
##
CSW1#show ip mroute 239.232.209.21 count
IP Multicast Statistics
5 routes using 2616 bytes of memory
4 groups, 0.25 average sources per group
Forwarding Counts: Pkt Count/Pkts per second/Avg Pkt Size/Kilobits per second
Other counts: Total/RPF failed/Other drops(OIF-null, rate-limit etc)
Group: 239.232.209.21, Source count: 1, Packets forwarded: 560, Packets received: 375
RP-tree: Forwarding: 1/0/1/0, Other: 0/0/0
Source: 10.18.15.23/32, Forwarding: 559/1/901/0, Other: 375/0/0
