RE: IPv4 Multicast

From: Rens (no email)
Date: Wed May 26 2010 - 10:59:02 EDT

  • Next message: Mike Walter: "txt.att.net operators"

    One more question:

    If I would now connect another switch (WS-C3524-XL) between the VLC receiver
    and the 3560G like this:

    VLC receiver - 3524XL - 3560G - 1841 - 1841 - 4503 - VLC sender

    That 3524XL only supports CGMP, what do I need to change on the config to
    not broadcast this multicast traffic?

    Do I need to configure the ip cgmp router-only on the 1841 at Receiver?

    -----Original Message-----
    From: Rens [mailto:]
    Sent: mercredi 26 mai 2010 16:10
    To: 'Everton Marques'
    Cc: ; 'Jamie Sobczyk'
    Subject: RE: IPv4 Multicast

    Woot! It was the TTL on the VLC sender that was on default, changed it to 10
    and now and I have my video.

     

    Thanks for your help.

      _____

    From: Everton Marques [mailto:]
    Sent: mercredi 26 mai 2010 15:42
    To: Rens
    Cc: Jamie Sobczyk;
    Subject: Re: IPv4 Multicast

     

    Does "show ip mroute count" on the 1841 (RP) display activity on traffic
    counters?

     

    Is the VLC sender directing multicast to the 1841 (RP) thru a default route?

     

    Is the VLC sender issuing multicast packets with a high-enough multicast TTL
    ?

     

    Everton

     

    On Wed, May 26, 2010 at 10:21 AM, Rens <> wrote:

    I have all those things you mentioned below.
    The VLC server (10.0.1.2) sends out 2 streams on 239.255.0.1 & 239.255.0.2
    I see both in SAP, when I try to join 239.255.0.2, nothing happens in VLC
    and below you have the output of my routers & switches at that time:

    On my RP router I see for show ip mroute:

    (*, 239.255.255.255), 5d04h/00:03:26, RP 172.16.0.2, flags: SJCL

     Incoming interface: Null, RPF nbr 0.0.0.0
     Outgoing interface list:

       FastEthernet0/1, Forward/Sparse, 1d06h/00:03:26
       FastEthernet0/0.200, Forward/Sparse, 5d04h/00:02:41

    (10.0.1.2, 239.255.255.255), 1d06h/00:03:28, flags: LT
     Incoming interface: FastEthernet0/0.200, RPF nbr 0.0.0.0
     Outgoing interface list:
       FastEthernet0/1, Forward/Sparse, 1d06h/00:03:26

    (*, 239.255.0.2), 00:01:10/00:03:19, RP 172.16.0.2, flags: S

     Incoming interface: Null, RPF nbr 0.0.0.0
     Outgoing interface list:

       FastEthernet0/1, Forward/Sparse, 00:01:10/00:03:19

    (*, 239.255.255.250), 00:07:19/00:03:07, RP 172.16.0.2, flags: S

     Incoming interface: Null, RPF nbr 0.0.0.0
     Outgoing interface list:

       FastEthernet0/1, Forward/Sparse, 00:07:22/00:03:03

    (*, 239.195.255.255), 1d06h/00:02:39, RP 172.16.0.2, flags: S

     Incoming interface: Null, RPF nbr 0.0.0.0
     Outgoing interface list:

       FastEthernet0/1, Forward/Sparse, 00:01:24/00:02:39

    (*, 224.2.127.254), 5d04h/00:03:10, RP 172.16.0.2, flags: SJCL

     Incoming interface: Null, RPF nbr 0.0.0.0
     Outgoing interface list:

       FastEthernet0/1, Forward/Sparse, 1d06h/00:03:10
       FastEthernet0/0.200, Forward/Sparse, 5d04h/00:02:38

    (*, 224.0.1.40), 5d04h/00:02:40, RP 172.16.0.2, flags: SJCL

     Incoming interface: Null, RPF nbr 0.0.0.0
     Outgoing interface list:

       FastEthernet0/1, Forward/Sparse, 1d06h/00:02:59
       FastEthernet0/0.200, Forward/Sparse, 5d04h/00:02:40

    On my other router I have:

    (*, 239.255.255.255), 5d04h/stopped, RP 172.16.0.2, flags: SJCL
     Incoming interface: FastEthernet0/1, RPF nbr 192.168.0.2
     Outgoing interface list:
       FastEthernet0/0.200, Forward/Sparse, 5d04h/00:02:54

    (10.0.1.2, 239.255.255.255), 1d06h/00:02:58, flags: LJT
     Incoming interface: FastEthernet0/1, RPF nbr 192.168.0.2
     Outgoing interface list:
       FastEthernet0/0.200, Forward/Sparse, 1d06h/00:02:54

    (*, 239.255.0.2), 00:01:55/00:02:56, RP 172.16.0.2, flags: SJC
     Incoming interface: FastEthernet0/1, RPF nbr 192.168.0.2
     Outgoing interface list:
       FastEthernet0/0.200, Forward/Sparse, 00:01:55/00:02:56

    (*, 239.255.255.250), 00:08:04/00:02:53, RP 172.16.0.2, flags: SJC
     Incoming interface: FastEthernet0/1, RPF nbr 192.168.0.2
     Outgoing interface list:
       FastEthernet0/0.200, Forward/Sparse, 00:08:04/00:02:53

    (*, 239.195.255.255), 5d04h/00:02:50, RP 172.16.0.2, flags: SJC
     Incoming interface: FastEthernet0/1, RPF nbr 192.168.0.2
     Outgoing interface list:
       FastEthernet0/0.200, Forward/Sparse, 00:02:08/00:02:50

    (*, 224.2.127.254), 5d04h/00:02:48, RP 172.16.0.2, flags: SJCL
     Incoming interface: FastEthernet0/1, RPF nbr 192.168.0.2
     Outgoing interface list:
       FastEthernet0/0.200, Forward/Sparse, 5d04h/00:02:48

    (*, 224.0.1.40), 5d04h/00:02:52, RP 172.16.0.2, flags: SJCL
     Incoming interface: FastEthernet0/1, RPF nbr 192.168.0.2
     Outgoing interface list:
       FastEthernet0/0.200, Forward/Sparse, 5d04h/00:02:52

    On the switch where the RP is connected:

    Vlan Group Version Port List
    ---------------------------------------------------------
    200 224.0.1.40 v2 Gi2/24
    200 224.2.127.254 v2 Gi2/24
    200 239.255.255.255v2 Gi2/24

    On the switch where the receiver is connected:

    Vlan Group Type Version Port List
    -----------------------------------------------------------------------

    200 224.0.1.40 igmp v2 Gi0/24
    200 224.2.127.254 igmp v2 Gi0/1, Gi0/24
    200 239.195.255.255 igmp v2 Gi0/1, Gi0/24
    200 239.255.0.2 igmp v2 Gi0/1, Gi0/24
    200 239.255.255.250 igmp v2 Gi0/2, Gi0/24
    200 239.255.255.255 igmp v2 Gi0/1, Gi0/24

    -----Original Message-----
    From: Jamie Sobczyk [mailto:]
    Sent: vendredi 21 mai 2010 16:52
    To:
    Cc:

    Subject: RE: IPv4 Multicast

    Make sure you have
    "ip multicast-routing"
    on both routers.

    On the router interfaces, make sure you have
    "ip pim sparse-mode"

    On both routers, make sure you have the same rp address assigned and
    that you can ping this ip address from both routers. (I prefer to make
    it a loopback interface)
    "ip pim rp-address w.x.y.z"

    Also, make sure that routing is setup on your routers so that your
    receiver can ping your sender.

    On your routers you should be able to see the source unicast address and
    multicast address by typing "show ip mroute"
    you should see something like this:
    (*, 239.192.3.47), 7w0d/00:02:59, RP 10.31.0.1, flags: S
      Incoming interface: Null, RPF nbr 0.0.0.0
      Outgoing interface list:
        Port-channel15, Forward/Sparse, 7w0d/00:02:59, H

    (10.5.9.51, 239.192.3.47), 4w5d/00:03:27, flags: TA
      Incoming interface: Port-channel15, RPF nbr 10.7.193.138
      Outgoing interface list:
        Port-channel17, Forward/Sparse, 4w5d/00:02:49, H

    On your switches, with igmp snooping enabled, you should be able to
    type:
    "show ip igmp snooping group" and see something like
    Vlan Group Type Version Port List
    -----------------------------------------------------------------------
    24 239.192.3.47 igmp v2 Gi1/0/21
    That port listed is the port of the requester.

    -----Original Message-----
    I have setup a lab for this multicast.

    VLC receiver - 3560G - 1841 - 1841 - 4503 - VLC sender

    The 2 switches only provide L2 access, they have IGMP snooping active

    On both 1841's I have pim parse-mode & sap listen on all interfaces +
    configured a static RP, the one closest to the sender.

    With my VLC receiver I can see the channels via SAP, but when I join the
    multicast group I don't receive anything.

    Could someone help me to troubleshoot this?

    Thanks in advance,

    Rens

     


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