Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Community Member

Multicast between subnets

We are trying to get multicast to work between two subnets but cannot seem to get it to work  We have the following configuration

multicast video - teradek cube - 10.223.21.101

  multicast - 239.1.254.1

  rtsp://10.223.21.101/stream1

client-a - 10.223.21.100

switch-a - 2960

router-a - 3725 - 10.223.21.1 (fa0/0.1)

fa0/1 - 10.0.10.9

|

|

fa0/1 - 10.0.10.101

router-b - 3725 - 10.223.99.1 (fa0/0.1)

switch-b - 2960

clent-b - 10.223.99.200

Client A and the multicast video server are connected to switch-a

Client B is connected to switch-b

Client A can access the multicast video

Client B cannot access the multicast video

Here is the configs

router-a

!

ip multicast-routing

!

int fa0/0

  no ip addr

!

int fa0/0.1

  desc local network

  encap dot1q 1 native

  ip addr 10.223.21.1 255.255.255.0

  ip pim sparse-mode

!

int fa0/1

  ip addr 10.0.10.9 255.255.255.0

  ip pim sparse-mode

!

ip pim autorp listner

ip pim send-rp-announce fa0/1 scope 8

ip pim send-rp-discovery fa0/1 scope 8

!

================================================

router-b

!

ip multicast-routing

!

int fa0/0

  no ip addr

!

int fa0/0.1

  desc local network

  encap dot1q 1 native

  ip addr 10.223.99.1 255.255.255.0

  ip pim sparse-mode

!

int fa0/1

  ip addr 10.0.10.101 255.255.255.0

  ip pim sparse-mode

!

ip pim autorp listner

!

Any help would be appreciated.

Everyone's tags (3)
1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Bronze

Multicast between subnets

There aren't any joins on the 'B' side. Verify the client's application TTL setting is greater than 1.

4 REPLIES

Re: Multicast between subnets

Can you post a quick diagram of how this is connected?

Also, can you post:

sh ip pim interfa

sh ip pim rp

sh ip mroute 239.1.254.1

sh ip pim rp mapping

sh ip pim autorp

HTH,

John

HTH, John *** Please rate all useful posts ***
Community Member

Multicast between subnets

Here is how things are connected:

router - 10.223.21.1

er-SPARE2#sh ip pim inter

Address          Interface                Ver/   Nbr    Query  DR     DR
                                          Mode   Count  Intvl  Prior
10.223.21.1      FastEthernet0/0.1        v2/S   0      30     1      10.223.21.1
10.0.10.9        FastEthernet0/1          v2/S   1      30     1      10.0.10.101
er-SPARE2#sh ip pim rp
Group: 239.1.254.1, RP: 10.0.10.9, v2, v1, next RP-reachable in 00:01:09
Group: 239.255.255.250, RP: 10.0.10.9, v2, v1, next RP-reachable in 00:00:45
Group: 228.67.43.91, RP: 10.0.10.9, v2, v1, next RP-reachable in 00:01:09

er-SPARE2#sh ip mroute 239.1.254.1
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
Outgoing interface flags: H - Hardware switched, A - Assert winner
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 239.1.254.1), 00:00:29/stopped, RP 10.0.10.9, flags: SJC
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    FastEthernet0/0.1, Forward/Sparse, 00:00:29/00:02:38

(10.223.21.103, 239.1.254.1), 00:00:27/00:02:58, flags: PT
  Incoming interface: FastEthernet0/0.1, RPF nbr 0.0.0.0
  Outgoing interface list: Null

er-SPARE2#sh ip pim rp mapping
PIM Group-to-RP Mappings
This system is an RP (Auto-RP)
This system is an RP-mapping agent (FastEthernet0/1)

Group(s) 224.0.0.0/4
  RP 10.0.10.9 (?), v2v1
    Info source: 10.0.10.9 (?), elected via Auto-RP
         Uptime: 19:09:00, expires: 00:02:59

er-SPARE2#sh ip pim autorp
AutoRP Information:
  AutoRP is enabled.
  AutoRP groups over sparse mode interface is enabled

PIM AutoRP Statistics: Sent/Received
  RP Announce: 5302/4055, RP Discovery: 5345/0


===========================================================================================


router - 10.223.99.1

er-CARVER#sh ip pim inter

Address          Interface                Ver/   Nbr    Query  DR     DR
                                          Mode   Count  Intvl  Prior
10.223.99.1      FastEthernet0/0.1        v2/S   0      30     1      10.223.99.1
10.0.10.101      FastEthernet0/1          v2/S   1      30     1      10.0.10.101

er-CARVER#sh ip pim rp


er-CARVER#sh ip mroute 239.1.254.1
Group 239.1.254.1 not found
er-CARVER#sh ip pim rp mapping
PIM Group-to-RP Mappings

Group(s) 224.0.0.0/4
  RP 10.0.10.9 (?), v2v1
    Info source: 10.0.10.9 (?), elected via Auto-RP
         Uptime: 19:09:03, expires: 00:02:47

er-CARVER#sh ip pim autorp
AutoRP Information:
  AutoRP is enabled.
  AutoRP groups over sparse mode interface is enabled

PIM AutoRP Statistics: Sent/Received
  RP Announce: 0/0, RP Discovery: 0/4081
er-CARVER#

Hall of Fame Super Bronze

Multicast between subnets

There aren't any joins on the 'B' side. Verify the client's application TTL setting is greater than 1.

Community Member

Multicast between subnets

That was it, the TTL setting.  Thanks.

1821
Views
0
Helpful
4
Replies
CreatePlease to create content