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Multicast Over Vlans - Not Working

Hello All,

I've multicast issue, when i use different vlan.

The group adress is 239.192.1.1

On 3850 :

I've enable IP PIM sparse mode enable on INT VLAN 7 ET VLAN 3

RP adresse10.1.8.254

 

On SG500 L2 :

Ip igmp snooping only enable

here is the config on the 3850 and some multicast command in order to debug:

CORE#sh ip int brief

Interface              IP-Address      OK? Method Status                Protocol

Vlan1                  unassigned      YES NVRAM  up                    up

Vlan2                  10.1.1.254      YES NVRAM  up                    up

Vlan3                  10.1.2.254      YES NVRAM  up                    up

Vlan4                  10.1.5.254      YES NVRAM  up                    up

Vlan5                  10.1.6.254      YES NVRAM  up                    up

Vlan6                  10.1.7.254      YES NVRAM  up                    up

Vlan7                  10.1.8.254      YES NVRAM  up                    up

Vlan8                  10.1.9.254      YES NVRAM  up                    up

Vlan9                  10.1.10.254     YES NVRAM  up                    up

Vlan10                 10.1.11.254     YES NVRAM  up                    up

GigabitEthernet0/0     unassigned      YES unset  down                  down

GigabitEthernet1/0/1   unassigned      YES unset  down                  down

GigabitEthernet1/0/2   unassigned      YES unset  administratively down down

GigabitEthernet1/0/3   unassigned      YES unset  administratively down down

GigabitEthernet1/0/4   unassigned      YES unset  administratively down down

GigabitEthernet1/0/5   unassigned      YES unset  administratively down down

GigabitEthernet1/0/6   unassigned      YES unset  administratively down down

GigabitEthernet1/0/7   unassigned      YES unset  administratively down down

GigabitEthernet1/0/8   unassigned      YES unset  administratively down down

GigabitEthernet1/0/9   unassigned      YES unset  administratively down down

GigabitEthernet1/0/10  unassigned      YES unset  up                    up

 

Te1/1/1                10.92.255.22    YES NVRAM  up                    up

Te1/1/2                unassigned      YES unset  up                    up

Te1/1/3                unassigned      YES unset  up                    up

Te1/1/4                unassigned      YES unset  administratively down down

Tunnel0                10.1.8.254      YES unset  up                    up

Tunnel1                10.1.8.254      YES unset  up                    up

 

 

CORE#sh ip route

 

 

Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP

       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

       E1 - OSPF external type 1, E2 - OSPF external type 2

       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

       ia - IS-IS inter area, * - candidate default, U - per-user static route

       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP

       + - replicated route, % - next hop override

 

Gateway of last resort is 10.92.255.21 to network 0.0.0.0

 

S*    0.0.0.0/0 [1/0] via 10.92.255.21

      10.0.0.0/8 is variably subnetted, 20 subnets, 4 masks

C        10.1.1.0/24 is directly connected, Vlan2

L        10.1.1.254/32 is directly connected, Vlan2

C        10.1.2.0/24 is directly connected, Vlan3

L        10.1.2.254/32 is directly connected, Vlan3

C        10.1.4.0/23 is directly connected, Vlan4

L        10.1.5.254/32 is directly connected, Vlan4

C        10.1.6.0/24 is directly connected, Vlan5

L        10.1.6.254/32 is directly connected, Vlan5

C        10.1.7.0/24 is directly connected, Vlan6

L        10.1.7.254/32 is directly connected, Vlan6

C        10.1.8.0/24 is directly connected, Vlan7

L        10.1.8.254/32 is directly connected, Vlan7

C        10.1.9.0/24 is directly connected, Vlan8

L        10.1.9.254/32 is directly connected, Vlan8

C        10.1.10.0/24 is directly connected, Vlan9

L        10.1.10.254/32 is directly connected, Vlan9

C        10.1.11.0/24 is directly connected, Vlan10

L        10.1.11.254/32 is directly connected, Vlan10

C        10.92.255.20/30 is directly connected, TenGigabitEthernet1/1/1

L        10.92.255.22/32 is directly connected, TenGigabitEthernet1/1/1

 

CORE#sh int vlan 7

Vlan7 is up, line protocol is up

  Hardware is Ethernet SVI, address is cc5a.5383.1067 (bia cc5a.5383.1067)

  Internet address is 10.1.8.254/24

  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

     reliability 255/255, txload 1/255, rxload 7/255

  Encapsulation ARPA, loopback not set

  Keepalive not supported

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:00, output never, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/20/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 30277000 bits/sec, 2789 packets/sec

  5 minute output rate 28000 bits/sec, 1 packets/sec

     370430248 packets input, 503272111747 bytes, 0 no buffer

     Received 0 broadcasts (10 IP multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     416819 packets output, 95619968 bytes, 0 underruns

     0 output errors, 2 interface resets

     0 unknown protocol drops

     0 output buffer failures, 0 output buffers swapped out

 

                 

CORE#sh int vlan 3

Vlan3 is up, line protocol is up

  Hardware is Ethernet SVI, address is cc5a.5383.1067 (bia cc5a.5383.1067)

  Internet address is 10.1.2.254/24

  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive not supported

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:03, output never, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 57000 bits/sec, 4 packets/sec

     3435540 packets input, 1945286581 bytes, 0 no buffer

     Received 0 broadcasts (3 IP multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     4778213 packets output, 6015209728 bytes, 0 underruns

     0 output errors, 2 interface resets

     0 unknown protocol drops

     0 output buffer failures, 0 output buffers swapped out

CORE#

CORE#

CORE#

 

CORE#sh ip pim rp

Group: 239.192.1.1, RP: 10.1.8.254, next RP-reachable never

Group: 239.255.255.255, RP: 10.1.8.254, next RP-reachable never

Group: 239.255.255.254, RP: 10.1.8.254, next RP-reachable never

Group: 239.255.255.250, RP: 10.1.8.254, next RP-reachable never

Group: 239.192.0.1, RP: 10.1.8.254, next RP-reachable never

Group: 224.0.1.40, RP: 10.1.8.254, next RP-reachable never

CORE#

CORE#

 

 

CORE#sh int trunk

 

Port        Mode             Encapsulation  Status        Native vlan

Gi1/0/47    on               802.1q         trunking      1

Gi1/0/48    on               802.1q         trunking      999

Te1/1/2     on               802.1q         trunking      999

Te1/1/3     on               802.1q         trunking      999

 

Port        Vlans allowed on trunk

Gi1/0/47    1-10,30,999

Gi1/0/48    1-10,30,999

Te1/1/2     1-10,30,999

Te1/1/3     1-10,30,999

 

Port        Vlans allowed and active in management domain

Gi1/0/47    1-10,30,999

Gi1/0/48    1-10,30,999

Te1/1/2     1-10,30,999

Te1/1/3     1-10,30,999

 

Port        Vlans in spanning tree forwarding state and not pruned

Gi1/0/47    1-10,30,999

Gi1/0/48    1-10,30,999

Te1/1/2     1-10,30,999

Te1/1/3     1-10,30,999

CORE#

CORE#

 

CORE#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, 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,

       G - Received BGP C-Mroute, g - Sent BGP C-Mroute,

       N - Received BGP Shared-Tree Prune, n - BGP C-Mroute suppressed,

       Q - Received BGP S-A Route, q - Sent BGP S-A Route,

       V - RD & Vector, v - Vector, p - PIM Joins on route,

       x - VxLAN group

Outgoing interface flags: H - Hardware switched, A - Assert winner, p - PIM Join

 Timers: Uptime/Expires

 Interface state: Interface, Next-Hop or VCD, State/Mode

 

 

239.192.1.1), 13:49:06/00:02:29, RP 10.1.8.254, flags: SJCL

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan3, Forward/Sparse, 01:36:32/00:02:29

    Vlan7, Forward/Sparse, 13:20:02/00:02:08

 

(*, 239.255.255.255), 1d08h/stopped, RP 10.1.8.254, flags: SJC

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan3, Forward/Sparse, 01:59:29/00:02:30

    Vlan7, Forward/Sparse, 1d07h/00:02:10

 

(10.1.2.100, 239.255.255.255), 01:59:02/00:01:09, flags: T

  Incoming interface: Vlan3, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan7, Forward/Sparse, 01:59:02/00:02:10

 

(10.1.8.1, 239.255.255.255), 1d07h/00:02:45, flags: T

  Incoming interface: Vlan7, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan3, Forward/Sparse, 01:59:29/00:02:30

 

(10.1.8.100, 239.255.255.255), 1d07h/00:01:06, flags: JT

  Incoming interface: Vlan7, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan3, Forward/Sparse, 01:59:29/00:02:30

 

(*, 239.255.255.254), 01:59:30/00:02:35, RP 10.1.8.254, flags: SJC

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan3, Forward/Sparse, 01:59:29/00:02:35

 

(*, 239.255.255.250), 1d08h/00:02:52, RP 10.1.8.254, flags: SJC

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan3, Forward/Sparse, 01:59:29/00:02:33

    Vlan6, Forward/Sparse, 1d08h/00:02:52

 

(*, 239.192.0.1), 01:59:27/00:02:36, RP 10.1.8.254, flags: SJCL

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan3, Forward/Sparse, 01:59:27/00:02:36

 

(*, 224.0.1.40), 1d08h/00:02:51, RP 10.1.8.254, flags: SJCL

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan6, Forward/Sparse, 1d08h/00:02:51

 

CORE#sh ip igmp membership

Flags: A  - aggregate, T - tracked

       L  - Local, S - static, V - virtual, R - Reported through v3

       I - v3lite, U - Urd, M - SSM (S,G) channel

       1,2,3 - The version of IGMP, the group is in

Channel/Group-Flags:

       / - Filtering entry (Exclude mode (S,G), Include mode (G))

Reporter:

       <mac-or-ip-address> - last reporter if group is not explicitly tracked

       <n>/<m>      - <n> reporter in include mode, <m> reporter in exclude

 

 Channel/Group                  Reporter        Uptime   Exp.  Flags  Interface

 *,239.192.1.1                  10.1.2.254      01:37:06 02:56 2LA    Vl3

 *,239.192.1.1                  10.1.8.100      13:20:36 02:39 2A     Vl7

 *,239.255.255.255              10.1.2.11       02:00:04 02:56 2A     Vl3

 *,239.255.255.255              10.1.8.100      1d07h    02:33 2A     Vl7

 *,239.255.255.254              10.1.2.20       02:00:04 02:56 2A     Vl3

 *,239.255.255.250              10.1.2.100      02:00:04 02:59 2A     Vl3

 *,239.255.255.250              10.1.7.2        1d08h    02:18 2A     Vl6

 *,239.192.0.1                  10.1.2.254      02:00:01 02:03 2LA    Vl3

 *,224.0.1.40                   10.1.7.254      1d08h    02:17 2LA    Vl6

I noticed that in the sh ip mroute i've (*,G) and not  (S,G):

(*, 239.192.1.1), 13:49:06/00:02:29, RP 10.1.8.254, flags: SJCL

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan3, Forward/Sparse, 01:36:32/00:02:29

    Vlan7, Forward/Sparse, 13:20:02/00:02:08

 

 

BUT NOT 

( IP player, 239.192.1.1) 13:49:06/00:02:29, RP 10.1.8.254, flags: SJCL

  Incoming interface: VLAN 7, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan3, Forward/Sparse, 01:36:32/00:02:29

    Vlan7, Forward/Sparse, 13:20:02/00:02:08

Thanks for your help.

 

 

37 Replies 37

nsalgado
Cisco Employee
Cisco Employee

Hi Abdel,

can you send the outputs below?

sh ip arp vlan 7

sh run int vlan 7

sh ip pim interfaces

Also can you confirm that your source is sending multicast traffic for that group with pkt cap?

Thank you.

Norberto

Hello Noberto,

thanks for your answer.

About my issue i'll give you more details.

The player 10.1.7.100 on Vlan 7 receive the IPTV flow group 239.192.1.1 its' working fine.

I've the issue with the Vlan 3 on the player 10.1.2.100.

I can confirm that the source is sending multicast traffic because i can see the TV channel up on 10.1.7.100.

below the commande you asked me, you can noticed that i've try to force to join in vlan 3 with  join-group 239.192.1.1 command.


CORE#sh ip arp vlan 7
Protocol  Address          Age (min)  Hardware Addr   Type   Interface
Internet  10.1.8.254              -   cc5a.5383.1067  ARPA   Vlan7
Internet  10.1.8.1              153   0018.1c00.94f3  ARPA   Vlan7
Internet  10.1.8.100            216   0018.1c00.aaa1  ARPA   Vlan7
CORE#sh run
CORE#sh run int vlan 7
Building configuration...

Current configuration : 80 bytes
!
interface Vlan7
 ip address 10.1.8.254 255.255.255.0
 ip pim sparse-mode
end

CORE#sh ip arp vlan 3
Protocol  Address          Age (min)  Hardware Addr   Type   Interface
Internet  10.1.2.254              -   cc5a.5383.1067  ARPA   Vlan3
Internet  10.1.2.20               0   b499.ba5c.e87e  ARPA   Vlan3
Internet  10.1.2.1               20   1866.da98.3e26  ARPA   Vlan3
Internet  10.1.2.2              184   000c.29e8.9f6f  ARPA   Vlan3
Internet  10.1.2.3              230   000c.29fc.46af  ARPA   Vlan3
Internet  10.1.2.10               8   1866.da98.3e4a  ARPA   Vlan3
Internet  10.1.2.11               0   000c.2977.7214  ARPA   Vlan3
Internet  10.1.2.100             40   0018.1c00.ac7e  ARPA   Vlan3
CORE#sh run int vlan 3
Building configuration...

Current configuration : 144 bytes
!
interface Vlan3
 ip address 10.1.2.254 255.255.255.0
 ip pim sparse-mode
 ip igmp join-group 239.192.1.1
 ip igmp join-group 239.192.0.1
end

CORE#sh ip pim inter
CORE#sh ip pim interface

Address          Interface                Ver/   Nbr    Query  DR         DR
                                          Mode   Count  Intvl  Prior
10.1.7.254       Vlan6                    v2/S   0      30     1          10.1.7.254
10.1.8.254       Vlan7                    v2/S   0      30     1          10.1.8.254
10.1.1.254       Vlan2                    v2/S   0      30     1          10.1.1.254
10.1.2.254       Vlan3                    v2/S   0      30     1          10.1.2.254
CORE#

In my SG500 (L2):

here is the command about IGMP:


SW-EST-1#sh ip igmp snooping groups


Vlan Group Source Include Ports Exclude Ports Comp.
Address Address Mode
---- ------------ ------------ -------------------- -------------------- -----
3 239.192.0.1 * gi1/1/50 v2
3 239.192.1.1 * gi1/1/6,gi1/1/50 v2
3 239.255.255. * gi1/1/6 v2
250
3 239.255.255. * gi1/1/6 v2
255
6 224.0.1.40 * gi1/1/50 v2
7 239.192.1.1 * gi1/1/24 v2
7 239.255.255. * gi1/1/24 v2
255


IGMP Reporters that are forbidden statically:

Vlan Group Source Ports
Address Address
---- ------------ ------------ -----------------------------------------------
3 239.192.0.1 * No Forbidden ports

SW-EST-1#sh ip igmp snooping
cpe customer premises equipment.
groups Group of multicast addresses learned by IGMP snooping
interface IGMP snooping interface information
mrouter IGMP snooping multicast routers interfaces
multicast-tv multicast transmissions from a vlan
SW-EST-1#sh ip igmp snooping mrouter

Vlan Dynamic Static Forbidden
----- -------------------- -------------------- --------------------
1
2
3 gi1/1/50
4
5
6 gi1/1/50 gi1/1/50
7 gi1/1/50
8
9
10
666
999


SW-EST-1#sh ip igmp snooping interface 3

IGMP Snooping is globally enabled
IGMP Snooping Querier is globally enabled
VLAN 3
IGMP Snooping is enabled
IGMP snooping last immediate leave: disable
Automatic learning of Multicast router ports is enabled
IGMP Snooping Querier is disabled
IGMP Snooping Querier operation state: is not running
IGMP Snooping Querier version: 2
IGMP Snooping Querier election is enabled
IGMP Snooping Querier address :
IGMP snooping robustness: admin 2 oper 2
IGMP snooping query interval: admin 125 sec oper 125 sec
IGMP snooping query maximum response: admin 10 sec oper 10 sec
IGMP snooping last member query counter: admin 2 (default) oper 2
IGMP snooping last member query interval: admin 1000 msec oper 1000 msec

Groups that are in IGMP version 2 compatibility mode:
Groups that are in IGMP version 1 compatibility mode:

SW-EST-1#sh ip igmp snooping interface 7

IGMP Snooping is globally enabled
IGMP Snooping Querier is globally enabled
VLAN 7
IGMP Snooping is enabled
IGMP snooping last immediate leave: disable
Automatic learning of Multicast router ports is enabled
IGMP Snooping Querier is disabled
IGMP Snooping Querier operation state: is not running
IGMP Snooping Querier version: 2
IGMP Snooping Querier election is enabled
IGMP Snooping Querier address :
IGMP snooping robustness: admin 2 oper 2
IGMP snooping query interval: admin 125 sec oper 125 sec
IGMP snooping query maximum response: admin 10 sec oper 10 sec
IGMP snooping last member query counter: admin 2 (default) oper 2
IGMP snooping last member query interval: admin 1000 msec oper 1000 msec

Groups that are in IGMP version 2 compatibility mode:
Groups that are in IGMP version 1 compatibility mode:

thanks for your help

Can you confirm the multicast stream has a TTL > 1.

Jon

Hello Jon,

Thanks for your help.

The multicast stream settings on my IPTV server multicast?

if yes, the settings is :10 (see my attachment)

I saw many post where you help about multicast issue. I follow all these post and the only thing i dont understand is why i dont have:

I noticed that in the sh ip mroute i've (*,G) and not  (S,G):

(*, 239.192.1.1), 13:49:06/00:02:29, RP 10.1.8.254, flags: SJCL

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan3, Forward/Sparse, 01:36:32/00:02:29

    Vlan7, Forward/Sparse, 13:20:02/00:02:08

 

 

BUT NOT 

( IP player, 239.192.1.1) 13:49:06/00:02:29, RP 10.1.8.254, flags: SJCL

Thanks

You are right, there should be another entry for that stream unless you have told it never to switch over which would have required extra configuration and that was why I asked about the TTL.

This may not be relevant but if you are using VLC some versions have a bug in the GUI where it does not accept the TTL value you enter and you have to run it for the command prompt for it to work.

If possible you could try capturing packets to check the TTL.

Jon 

Thks Jon,

The ip 10.1.2.100 is a box player IPTV not a VLC.

in the player web interface i can noticed that the SAP (session annoncment protocol) can get the 4 IPTV channel (see my attachement).

But the channel is not working and we have no bandwith in the port of the switch

When i use the IP 10.1.2.200 in the same VLAN with VLC the SAP detect the channel but same issue the channel doesnt works.

you will find in attachement the pcap of vlc and you can noticed the IGMP traffic.

in the player (SAP 239.255.255.255)detect the channel

Regards

Only have iphone access at the moment but will look at the attachments properly when I get to work tomorrow. 

Jon

Thanks for your help John

Regards

Hello Guys,

I've done some test and i think i've found something, here is the result:

If i'm connect directly to core with VLC I can get the stream from the all VLAN i want.

Therefore the issue is just on the SG-500(L2), where only VLAN 7 working.

In the SG-500 i've just enable IGMP snooping, do i need to change something in the settings?

when i enable IGMP snooping all the settings below is mounted automaticly.

You can download 2 pcap in the link below:

https://wetransfer.com/downloads/7bdec93ff95ce32f650fb69405ec95b420170804091457/d2b1f5190835d90c419e80e452dbf21b20170804091457/7ba637

Where you will find :

mirroring.pcap -> port mirroring on the server

Core port direct -> VLC connected direclty on CORE on vlan 3 working

Thanks for your help

Hello Guys,

Any ideas? i've search an all post on community forum and doesnt find anything on my issue.

Thanks for your help

Hello

 Is the RP 10.1.8.254 reachable from host 10.1.2.100

Sh ip mroute count 

res
Paul


Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

Hello Paul,

Yes from 10.1.2.100 i can join the RP 10.1.18.254

Something strange about the mroute count, i can noticed that group 239.192.1.1 no packet is sent, but i can confirm that the stream is working. (player on same VLAN to Server VLAN 7)

Hope this helps.

Thks for your help


CORE#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, 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,
       G - Received BGP C-Mroute, g - Sent BGP C-Mroute,
       N - Received BGP Shared-Tree Prune, n - BGP C-Mroute suppressed,
       Q - Received BGP S-A Route, q - Sent BGP S-A Route,
       V - RD & Vector, v - Vector, p - PIM Joins on route,
       x - VxLAN group
Outgoing interface flags: H - Hardware switched, A - Assert winner, p - PIM Join
 Timers: Uptime/Expires
 Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 239.192.1.1), 00:02:50/00:02:29, RP 10.1.8.254, flags: SJC
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Vlan7, Forward/Sparse, 00:02:50/00:02:29

(*, 239.255.255.255), 2d02h/stopped, RP 10.1.8.254, flags: SJCL
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Vlan3, Forward/Sparse, 2d02h/00:02:47
    Vlan7, Forward/Sparse, 2d02h/00:02:35

(10.1.2.100, 239.255.255.255), 2d02h/00:02:45, flags: LT
  Incoming interface: Vlan3, RPF nbr 0.0.0.0
  Outgoing interface list:
    Vlan7, Forward/Sparse, 2d02h/00:02:35

(10.1.8.100, 239.255.255.255), 2d02h/00:02:02, flags: LT
  Incoming interface: Vlan7, RPF nbr 0.0.0.0
  Outgoing interface list:
    Vlan3, Forward/Sparse, 2d02h/00:02:47

(10.1.8.1, 239.255.255.255), 2d02h/00:01:03, flags: LT
  Incoming interface: Vlan7, RPF nbr 0.0.0.0
  Outgoing interface list:
    Vlan3, Forward/Sparse, 2d02h/00:02:47

(*, 239.255.255.254), 2d02h/00:02:53, RP 10.1.8.254, flags: SJC
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Vlan3, Forward/Sparse, 2d02h/00:02:53

(*, 239.255.255.250), 2d02h/00:02:48, RP 10.1.8.254, flags: SJC
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Vlan3, Forward/Sparse, 2d02h/00:02:48

(*, 239.192.0.1), 08:45:38/00:02:49, RP 10.1.8.254, flags: SJC
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Vlan3, Forward/Sparse, 08:45:38/00:02:49

(*, 224.2.127.254), 2d02h/00:02:52, RP 10.1.8.254, flags: SJCL
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Vlan3, Forward/Sparse, 2d02h/00:02:52
    Vlan7, Forward/Sparse, 2d02h/00:02:35

(*, 224.0.1.40), 2d02h/00:02:49, RP 10.1.8.254, flags: SJCL
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Vlan3, Forward/Sparse, 2d02h/00:02:49


CORE#sh ip mroute count
Use "show ip mfib count" to get better response time for a large number of mroutes.

IP Multicast Statistics
10 routes using 6220 bytes of memory
7 groups, 0.42 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: 239.192.1.1, Source count: 0, Packets forwarded: 0, Packets received: 0

Group: 239.255.255.255, Source count: 3, Packets forwarded: 78900, Packets received: 78900
  RP-tree: Forwarding: 0/0/0/0, Other: 0/0/0
  Source: 10.1.2.100/32, Forwarding: 10442/0/68/0, Other: 10442/0/0
  Source: 10.1.8.100/32, Forwarding: 10562/0/69/0, Other: 10562/0/0
  Source: 10.1.8.1/32, Forwarding: 57896/0/164/0, Other: 57896/0/0

Group: 239.255.255.254, Source count: 0, Packets forwarded: 0, Packets received: 0

Group: 239.255.255.250, Source count: 0, Packets forwarded: 0, Packets received: 31
  RP-tree: Forwarding: 0/0/0/0, Other: 31/31/0

Group: 239.192.0.1, Source count: 0, Packets forwarded: 0, Packets received: 0

Group: 224.2.127.254, Source count: 0, Packets forwarded: 0, Packets received: 0

Group: 224.0.1.40, Source count: 0, Packets forwarded: 0, Packets received: 0
CORE#sh ip mroute count
Use "show ip mfib count" to get better response time for a large number of mroutes.

IP Multicast Statistics
10 routes using 6220 bytes of memory
7 groups, 0.42 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: 239.192.1.1, Source count: 0, Packets forwarded: 0, Packets received: 0

Group: 239.255.255.255, Source count: 3, Packets forwarded: 78913, Packets received: 78913
  RP-tree: Forwarding: 0/0/0/0, Other: 0/0/0
  Source: 10.1.2.100/32, Forwarding: 10444/0/68/0, Other: 10444/0/0
  Source: 10.1.8.100/32, Forwarding: 10563/0/69/0, Other: 10563/0/0
  Source: 10.1.8.1/32, Forwarding: 57906/0/164/0, Other: 57906/0/0

Group: 239.255.255.254, Source count: 0, Packets forwarded: 0, Packets received: 0

Group: 239.255.255.250, Source count: 0, Packets forwarded: 0, Packets received: 31
  RP-tree: Forwarding: 0/0/0/0, Other: 31/31/0

Group: 239.192.0.1, Source count: 0, Packets forwarded: 0, Packets received: 0

Group: 224.2.127.254, Source count: 0, Packets forwarded: 0, Packets received: 0

Group: 224.0.1.40, Source count: 0, Packets forwarded: 0, Packets received: 0
CORE#

Hello

the mroute count shows rpf failures 

check the ip rpf  ( RP )

res

paul


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Kind Regards
Paul

Thanks for your help.

Here is the result of the command:

RP is 10.1.8.254 (SVI of CORE VLAN 7)

Server :10.1.8.1 (VLAN7)

CORE#sh ip rpf 10.1.8.254
RPF information for ? (10.1.8.254)
  RPF interface: Vlan7
  RPF neighbor: ? (10.1.8.254) - directly connected
  RPF route/mask: 10.1.8.254/32
  RPF type: multicast (connected)
  Doing distance-preferred lookups across tables
  RPF topology: ipv4 multicast base

CORE#sh ip rpf 10.1.8.1
RPF information for ? (10.1.8.1)
  RPF interface: Vlan7
  RPF neighbor: ? (10.1.8.1) - directly connected
  RPF route/mask: 10.1.8.0/24
  RPF type: multicast (connected)
  Doing distance-preferred lookups across tables
  RPF topology: ipv4 multicast base


CORE#sh ip pim rp
Group: 239.192.1.1, RP: 10.1.8.254, next RP-reachable never
Group: 239.255.255.255, RP: 10.1.8.254, next RP-reachable never
Group: 239.255.255.254, RP: 10.1.8.254, next RP-reachable never
Group: 239.255.255.250, RP: 10.1.8.254, next RP-reachable never
Group: 239.192.0.1, RP: 10.1.8.254, next RP-reachable never
Group: 224.2.127.254, RP: 10.1.8.254, next RP-reachable never
Group: 224.0.1.40, RP: 10.1.8.254, next RP-reachable never
CORE#

Thanks Paul

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