11-14-2013 12:29 PM - edited 03-07-2019 04:36 PM
Hi,
I have problems with multicast. On the same VLAN i can see the SAP announcement in VLC and play, but on different VLAN i can see SAP but i cant play it. The play turn to pause and the video doesn´t appear.
I have 2 Cisco 6500 switch CORE with GLBP configured but not working. In the second switch i have all interfaces in shutdown. The first core switch have L3 routing enable.
The Global configurations:
ip multicast-routing.
I have the transmitter PC on vlan 51 i transmit to 230.0.0.50 group an im trying to recive on vlan 80. The vlans configurations are:
Vlan 51
ip address x.x.31.254 255.255.255.0
ip pim sparse-dense-mode
Vlan 80
ip address x.x.80.1 255.255.255.0
ip pim sparse-dense-mode
I have 2 Cisco 2960 (L2 only) for the access.The principal commands outputs are:
CORE1#show ip mroute | inc 230.0.0.50
(*, 230.0.0.50), 01:50:50/00:02:21, RP 0.0.0.0, flags: DC
CORE1#
CORE 1
interface Vlan1
ip address x.x.1.1 255.255.0.0
ip access-group 101 out
no ip unreachables
ip pim sparse-dense-mode
mls rp ip
interface Vlan51
ip address x.x.31.254 255.255.255.0
ip access-group 151 out
ip helper-address x.x.x.x
ip helper-address x.x.x.x
no ip unreachables
ip pim sparse-dense-mode
mls rp ip
interface Vlan80
ip address x.x.80.1 255.255.255.0
ip access-group 150 out
no ip unreachables
ip pim sparse-dense-mode
glbp 80 ip x.x.80.254
glbp 80 timers 5 18
glbp 80 timers redirect 600 7200
glbp 80 priority 254
glbp 80 preempt delay minimum 60
glbp 80 authentication text glbpkey
glbp 80 forwarder preempt delay minimum 60
CORE2
interface Vlan1
ip address x.x.1.4 255.255.0.0
ip access-group 101 out
no ip unreachables
ip pim sparse-dense-mode
mls rp ip
interface Vlan51
ip address x.x.31.2 255.255.255.0
ip access-group 151 out
ip helper-address x.x.x.x
ip helper-address x.x.x.x
no ip unreachables
ip pim sparse-dense-mode
shutdown
mls rp ip
glbp 51 ip x.x.31.254
glbp 51 timers 5 18
glbp 51 timers redirect 600 7200
glbp 51 preempt delay minimum 60
glbp 51 authentication text glbpkey
glbp 51 forwarder preempt delay minimum 60
interface Vlan80
ip address x.x.80.2 255.255.255.0
ip access-group 150 out
no ip unreachables
ip pim sparse-dense-mode
shutdown
mls rp ip
glbp 80 ip x.x.80.254
glbp 80 timers 5 18
glbp 80 timers redirect 600 7200
glbp 80 preempt delay minimum 60
glbp 80 authentication text glbpkey
glbp 80 forwarder preempt delay minimum 60
end
Someone can help?
Thanks,
Alfredo
11-14-2013 12:43 PM
Alfredo
When you setup the stream in VLC did you make sure you increased the TTL of the stream ? By default VLC sets the ttl to 1 which means it will only work in the same vlan. For each hop you need to increase the TTL by 1 so as you are going from vlan 51 to vlan 80 try a TTL of 2 or greater and see if it works.
Jon
11-14-2013 12:47 PM
Hi Jon, thanks for your answer.
I increase the TTL to 255 but it doesnt works.
11-14-2013 12:50 PM
Are both devices connected to core 1 switch ?
Jon
11-14-2013 01:11 PM
I have the transmitter and the receiver conected to the same access switch (Cisco 2960), this switch are conected to another 2960 switch and this is conected to the CORE1 by a trunk port.
All the access switch are un L2, the only one that are in L3 and working is the CORE1. The interfaces vlans are in define in the CORE1 too.
11-14-2013 01:19 PM
Are the 2 2960 switches interconnected with a trunk link that allows both vlans ?
Jon
11-14-2013 01:22 PM
Yes i can make ping to the default gateways in both VLANS and surf the internet too. How can i define the RP or how can i see if the CORE is the RP?
11-14-2013 01:26 PM
You shouldn't really need an RP if you ip pim sparse-dense-mode because it should fall back to dense mode. If this is just a test environment can you replace "ip pim sparse-dense-mode" with just "ip pim dense-mode" and see if it works ?
Jon
11-14-2013 01:35 PM
My enviroment is productive but i recently made the change to dense mode in both interfaces (51 and 80) but it doesnt works. The PC doesn´t play de video.
Is there anything else to do?
Thanks a lot.
11-14-2013 01:37 PM
You have access-lists applied to both vlan interfaces - are you allowing the multicast traffic ?
Jon
11-14-2013 01:55 PM
I remove all the ACLs (Vlans 51, 80 and 1) i but not work.
11-14-2013 02:01 PM
So just to recap can you confirm all the following -
1) you have "ip pim dense-mode" configured under the vlan 51 and vlan 80 SVIs on the 6500 switch
2) you have removed all acls so there is nothing blocking any traffic flow
3) core 2 6500 is shutdown as far as vlan 51 and vlan 80 are concerned
4) you have set the TTL to be > 2 in the VLC stream
5) you are connecting to the same stream with your VLC client
If all the above is correct with dense mode can you post the output of "sh ip mroute" whilst streaming the video.
Jon
11-14-2013 07:32 PM
Hi,
I think you need to configure an RP. I normally use sparse mode and configure a loopback as RP. Configure a loopback interface and add ip pim sparse-mode on all interfaces. Then add the ip pim rp-address x.x.x.x where x.x.x.x is the loopback address.
interface lo0
ip address x.x.x.x 255.255.255.255
ip pim sparse-mode
interface vlan 51
ip address x.x.31.254 255.255.255.0
ip pim sparse-mode
interface vlan 80
ip address x.x.80.1 255.255.255.0
ip pim sparse-mode
ip pim rp-address x.x.x.x
11-15-2013 05:31 AM
Hi Johnd thanks for your answer, i made that you said but it does not works.
I configure the loopback 1 with the ip address 192.168.230.230 255.255.255.0 and the ip pim sparse-mode. Then i remove all the ACls on the vlan interfaces and the ip pim rp-address 192.168.230.230.
I install wireshark on the receiver PC and i filter by multicast address 230.0.0.50 and i can see the igmp join request but the switch never send the traffic.
Anymore to do?
Thanks a lot.
11-15-2013 05:43 AM
As previously requested can you revert back to dense mode, run the stream from VLC and then post the output of "sh ip mroute".
The reason for using dense mode is that it only requires the most basic config.
Can you confirm that you set the stream running through VLC and then you fire off another VLC on the client and try to connect to that stream ?
Jon
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