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N7K-C7010 NX-OS 5.2.1 with N7K-M108X2-12L Unable to Run Multicast Routing

Hi Guys,

Need your help on this.

I have an N7N-C7010 running NX-OS 5.2.1 with N7K-SUP1 and N7K-M108X2-12L.

I was unable to run Multicast Routing (Inter-VLAN Multicast)

Here are the configurations:

interface Vlan131

  ip address 10.240.141.2/24

  ip ospf passive-interface

  ip router ospf 10 area 0.0.0.0

  ip pim sparse-mode

  ip igmp version 2

  hsrp 131

    preempt

    priority 105

    ip 10.240.141.1

  ip dhcp relay address 10.240.131.13

  no shutdown

  description IPTV

interface Vlan14

  ip address 10.240.144.2/23

  ip ospf passive-interface

  ip router ospf 10 area 0.0.0.0

  ip pim sparse-mode

  ip igmp version 2

  hsrp 14

    preempt

    priority 105

    ip 10.240.144.1

  ip dhcp relay address 10.240.2.100

  no shutdown

  description USERS

Router# sho ip igmp groups

IGMP Connected Group Membership for VRF "default" - 3 total entries

Type: S - Static, D - Dynamic, L - Local, T - SSM Translated

Group Address      Type Interface           Uptime    Expires   Last Reporter

224.0.1.60         D    Vlan14              04:55:48  00:02:37  10.240.144.60

239.255.255.246    D    Vlan14              04:55:44  00:02:41  10.240.144.32

239.255.255.250    D    Vlan14              04:55:52  00:02:33  10.240.144.60

Router#

Source is connected on VLAN131 while the client on VLAN14.

Hope someone can reply today. Need your feedbacks asap as I'm on-site right now.

Thanks,

Eugene

5 REPLIES
Hall of Fame Super Blue

Re: N7K-C7010 NX-OS 5.2.1 with N7K-M108X2-12L Unable to Run Mult

Eugene

Not familiar with Nexus switches so these questions might not be applicable but  -

1) have you configured an RP ? If not you can either -

a) configure the Nexus to be an RP

or

b) configure "ip pim sparse-dense-mode" under the vlan interfaces (if supported)

2) have you checked that the TTL of the packets is greater than 1 (it needs to be to be routed across the vlan interfaces). The TTL settings would be on the actual source ie. usually set in the application itself.

Jon

New Member

N7K-C7010 NX-OS 5.2.1 with N7K-M108X2-12L Unable to Run Multicas

Hi Jon,

For now its just inter-VLAN routing and I don't think we need RP right away.

There's no option if sparse-dense on Nexus.

As requested, please see output below:

Router# sho ip mroute summ

IP Multicast Routing Table for VRF "default"

Total number of routes: 32

Total number of (*,G) routes: 3

Total number of (S,G) routes: 28

Total number of (*,G-prefix) routes: 1

Group count: 9, rough average sources per group: 3.1

Group: 224.0.1.60/32, Source count: 1

Source          packets      bytes           aps   pps       bit-rate     oifs

(*,G)           43           3096            72    0         0.000   bps  1

10.240.144.51   36           2732            75    0         10.133  bps  1

Group: 232.0.0.0/8, Source count: 0

Source          packets      bytes           aps   pps       bit-rate     oifs

(*,G)           0            0               0     0         0.000   bps  0

Group: 239.0.1.2/32, Source count: 1

Source          packets      bytes           aps   pps       bit-rate     oifs

192.168.10.100  1            1344            1344  0         0.000   bps  0

Group: 239.0.1.3/32, Source count: 1

Source          packets      bytes           aps   pps       bit-rate     oifs

192.168.10.100  1            1344            1344  0         0.000   bps  0

Group: 239.0.1.4/32, Source count: 1

Source          packets      bytes           aps   pps       bit-rate     oifs

192.168.10.100  1            1344            1344  0         0.000   bps  0

Group: 239.0.1.5/32, Source count: 1

Source          packets      bytes           aps   pps       bit-rate     oifs

192.168.10.100  1            1344            1344  0         0.000   bps  0

Group: 239.0.1.6/32, Source count: 1

Source          packets      bytes           aps   pps       bit-rate     oifs

192.168.10.100  1            1344            1344  0         0.000   bps  0

Group: 239.0.1.8/32, Source count: 1

Source          packets      bytes           aps   pps       bit-rate     oifs

192.168.10.100  1            1344            1344  0         0.000   bps  0

Group: 239.255.255.246/32, Source count: 0

Source          packets      bytes           aps   pps       bit-rate     oifs

(*,G)           0            0               0     0         0.000   bps  1

Group: 239.255.255.250/32, Source count: 21

Source          packets      bytes           aps   pps       bit-rate     oifs

(*,G)           21           6661            317   0         0.000   bps  2

10.240.141.14   108          42812           396   0         0.000   bps  2

10.240.141.16   93           15341           164   0         0.000   bps  2

10.240.144.17   395          202281          512   0         0.000   bps  2

10.240.144.18   36           18005           500   0         0.000   bps  2

10.240.144.19   8            1316            164   0         0.000   bps  2

10.240.144.24   6            986             164   0         0.000   bps  2

10.240.144.30   92           15176           164   0         0.000   bps  2

10.240.144.31   11           1811            164   0         0.000   bps  2

10.240.144.32   144          48676           338   0         0.000   bps  2

10.240.144.33   124          62015           500   0         0.000   bps  2

10.240.144.39   6            986             164   0         0.000   bps  2

10.240.144.46   6            986             164   0         0.000   bps  2

10.240.144.49   9            1481            164   0         0.000   bps  2

10.240.144.53   56           9236            164   0         0.000   bps  2

10.240.144.58   120          60014           500   0         0.000   bps  2

10.240.144.59   48           7480            155   0         0.000   bps  2

10.240.144.73   9            1481            164   0         0.000   bps  2

10.240.144.81   103          35630           345   0         0.000   bps  2

10.240.144.82   347          81029           233   0         0.000   bps  2

10.240.144.85   4            656             164   0         0.000   bps  2

10.240.144.108  6            6832            1138  0         0.000   bps  2

Router# 

Thanks,

Eugene

Hall of Fame Super Blue

N7K-C7010 NX-OS 5.2.1 with N7K-M108X2-12L Unable to Run Multicas

Eugene

Is it because it is all on one switch you say you do not need an RP ?

My understanding of PIM sparse mode was that an RP was required and not optional.

Could you try just configuring the Nexus as the RP and see what happens ?

Jon

Hall of Fame Super Blue

N7K-C7010 NX-OS 5.2.1 with N7K-M108X2-12L Unable to Run Multicas

Eugene

Can you also post output of "sh ip mroute "

Jon

New Member

N7K-C7010 NX-OS 5.2.1 with N7K-M108X2-12L Unable to Run Multicas

Hi Jon,

Right now were doing the test on multicast address 239.0.1.2 between VLANs 131(server) and 14(listener).

Thanks,

Eugene

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