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Multicast between VLAN's

shamg1974
Level 1
Level 1

‎10-05-2012 07:40 AM - edited ‎03-07-2019 09:18 AM

Hello all,

I have Panasonic projectors in one subnet and laptops in another subnet. I'm not able to reach the projectors from the laptops via the Panasonic Wireless Manager. I can ping them, but that's it. I'm suspecting some kind of multicast issue. I have the following configured on my router:

interface Vlan300  (Projectors)

description Legacy Network

ip address 172.21.7.1 255.255.224.0

ip helper-address 172.21.0.222

ip pim sparse-dense-mode

interface Vlan11 (laptops)

description Wireless Students

ip address 10.200.11.1 255.255.255.0

ip helper-address 172.21.0.222

ip pim sparse-dense-mode

From what i've read, I don't need an RP. I've attached my config if it helps.

Any help is greatly appreciated.

Bobby Grewal

Labels:
136306-STPCS_MDFB_Core.zip
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7 Replies 7

Dirk Woellhaf
Level 1
Level 1

‎10-05-2012 08:02 AM

Hi,

first question is:

- are you sure that the traffic is routable? Having at least TTL >2?

And by checking your config I´ve seen a 5508 WLC, which brings up the following questions:

- Are your clients wireless clients?

- If wireless, did you enable MC-Routing on the Controller?

regards,

    Dirk

(Please rate if helpful)

regards, Dirk (Please rate if helpful)
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shamg1974
Level 1
Level 1
In response to Dirk Woellhaf

‎10-05-2012 08:05 AM

Dirk,

Yes traffic is routable.TTL is greater than 2, however. More like 253.Global Multicast mode is enabled on the controllers.

Bobby

0 Helpful

shamg1974
Level 1
Level 1
In response to shamg1974

‎10-05-2012 08:07 AM

Correction...Multicast messaging isn't enabled on the WLC.

0 Helpful

shamg1974
Level 1
Level 1
In response to shamg1974

‎10-05-2012 08:12 AM

STPCS_MDFB_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,

       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

(*, 239.255.255.254), 01:02:08/00:02:13, RP 172.21.7.1, flags: SJC

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan300, Forward/Sparse-Dense, 00:54:10/00:02:13

(*, 239.255.255.253), 01:02:16/00:02:16, RP 172.21.7.1, flags: SJC

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan300, Forward/Sparse-Dense, 00:54:12/00:02:16

(*, 239.255.255.250), 01:02:16/00:02:16, RP 172.21.7.1, flags: SJC

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan300, Forward/Sparse-Dense, 00:54:12/00:02:11

    Vlan12, Forward/Sparse-Dense, 01:02:16/00:02:12

    Vlan11, Forward/Sparse-Dense, 01:02:16/00:02:16

(*, 239.1.2.3), 01:03:02/stopped, RP 172.21.7.1, flags: SJC

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan300, Forward/Sparse-Dense, 00:54:11/00:02:13

    Vlan5, Forward/Sparse-Dense, 01:03:02/00:02:52

(10.200.5.11, 239.1.2.3), 00:59:24/00:02:57, flags: T

  Incoming interface: Vlan5, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan300, Forward/Sparse-Dense, 00:59:24/00:02:13

(*, 239.1.2.4), 01:03:02/stopped, RP 172.21.7.1, flags: SJC

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan5, Forward/Sparse-Dense, 00:01:13/00:02:54

(10.200.5.12, 239.1.2.4), 00:59:23/00:02:57, flags: PT

  Incoming interface: Vlan5, RPF nbr 0.0.0.0

  Outgoing interface list: Null

(*, 235.80.68.83), 01:02:15/00:02:16, RP 172.21.7.1, flags: SJC

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan300, Forward/Sparse-Dense, 00:54:02/00:02:16

(*, 224.3.4.5), 01:02:13/stopped, RP 172.21.7.1, flags: SJC

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan300, Forward/Sparse-Dense, 00:54:04/00:02:18

(172.21.0.248, 224.3.4.5), 00:59:08/00:02:11, flags: PT

  Incoming interface: Vlan300, RPF nbr 0.0.0.0

  Outgoing interface list: Null

(*, 224.0.1.24), 01:02:12/00:02:08, RP 172.21.7.1, flags: SJC

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan300, Forward/Sparse-Dense, 00:54:12/00:02:08

(*, 224.0.1.1), 01:02:15/00:02:08, RP 172.21.7.1, flags: SJC

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan300, Forward/Sparse-Dense, 00:54:12/00:02:08

(*, 224.0.1.60), 01:02:19/00:02:08, RP 172.21.7.1, flags: SJC

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan300, Forward/Sparse-Dense, 00:54:15/00:02:08

(*, 224.0.1.40), 01:03:05/00:02:14, RP 172.21.7.1, flags: SJCL

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan300, Forward/Sparse-Dense, 00:54:19/00:02:14

STPCS_MDFB_Core#

0 Helpful

Dirk Woellhaf
Level 1
Level 1
In response to shamg1974

‎10-05-2012 08:07 AM

Ok,

what does your MC-Routing-Table look like? (show ip mroute)

regards,

    Dirk

(Please rate if helpful)

regards, Dirk (Please rate if helpful)
0 Helpful

Dirk Woellhaf
Level 1
Level 1
In response to Dirk Woellhaf

‎10-05-2012 08:33 AM

So which is the mc-group for the panasonic-stuff?

Is there a Client requesting the group (show ip igmp groups)?

regards,

    Dirk

(Please rate if helpful)

regards, Dirk (Please rate if helpful)
0 Helpful

shamg1974
Level 1
Level 1
In response to Dirk Woellhaf

‎10-05-2012 08:39 AM

The projectors are on vlan 300. I believe the group is:

(*, 239.1.2.3), 01:03:02/stopped, RP 172.21.7.1, flags: SJC

  Incoming interface: Null, RPF nbr 0.0.0.0

  Outgoing interface list:

    Vlan300, Forward/Sparse-Dense, 00:54:11/00:02:13

    Vlan5, Forward/Sparse-Dense, 01:03:02/00:02:52

239.1.2.3 is what is configured on the WLC as the multicast group IP.

Here is show ip igpm groups:

STPCS_MDFB_Core#sh ip igmp groups

IGMP Connected Group Membership

Group Address    Interface                Uptime    Expires   Last Reporter   Group Accounted

239.255.255.254  Vlan300                  1w1d      00:02:35  172.21.0.222   

239.255.255.253  Vlan300                  36w3d     00:02:30  172.21.7.99    

239.255.255.250  Vlan12                   02:39:58  00:02:34  10.200.12.2    

239.255.255.250  Vlan11                   4d04h     00:02:30  10.200.11.2    

239.255.255.250  Vlan300                  1y5w      00:02:26  172.21.3.211   

239.1.2.3        Vlan300                  1w3d      00:02:26  172.21.4.254   

239.1.2.3        Vlan5                    1y5w      00:02:27  10.200.5.66    

239.1.2.4        Vlan5                    00:23:05  00:02:30  10.200.5.12    

235.80.68.83     Vlan300                  34w2d     00:02:36  172.21.0.224   

224.3.4.5        Vlan300                  1y5w      00:02:28  172.21.0.248   

224.0.1.24       Vlan300                  1w1d      00:02:29  172.21.0.222   

224.0.1.1        Vlan300                  1d13h     00:02:26  172.21.0.249   

224.0.1.60       Vlan300                  13w5d     00:02:26  172.21.5.48    

224.0.1.40       Vlan300                  1y5w      00:02:27  172.21.7.1     

STPCS_MDFB_Core#

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