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| Author |
Message |
Hemat Maheshwari
Guest
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 Posted: Sat Apr 22, 2006 8:51 am Post subject: Multicasting b/w VLANs |
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Hi !
The scenerio is Like this :
I am on my laptop which is connected with the Access Switch 2950,
The access switch is connected with the Distribution 3550 Switch and
3550 Distribution is connected with the Core Switch.
There are multiple VLANs and other locations are also connected in the
same way with this Core swithc.I am trying for the multicasting audio
/streaming.
CORE(config)#interface vlan 22
CORE(config-if)#ip pim version 2
CORE(config-if)#ip pim dense-mode
CORE(config-if)#ip cgmp
CORE(config)#ip multicast-routing
CORE(config)#interface vlan 99
CORE(config-if)#ip pim version 2
CORE(config-if)#ip pim dense-mode
CORE(config-if)#ip cgmp
Access Switch is L2 switch and didnt use any command for multicasting.
I configured the following command on the Core Switch and installed a
application for audio streaming LIVE CASTER.
when i select the audio file and assign the IP address on the user of
VLAN 22, the LIVE Caster starts the playing file but on the user of
VLAN 22 there is no respone.
I have debug ip cgmp , but didnt see any thing .
Where can be the problem? Where I need to make the changes ? |
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stephen
Guest
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| Posted: Sat Apr 22, 2006 6:19 pm Post subject: Re: Multicasting b/w VLANs |
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"Hemat Maheshwari" <hemat.maheshwari@gmail.com> wrote in message
news:1145681461.529521.108460@i40g2000cwc.googlegroups.com...
| Quote: |
Hi !
The scenerio is Like this :
I am on my laptop which is connected with the Access Switch 2950,
The access switch is connected with the Distribution 3550 Switch and
3550 Distribution is connected with the Core Switch.
There are multiple VLANs and other locations are also connected in the
same way with this Core swithc.I am trying for the multicasting audio
/streaming.
CORE(config)#interface vlan 22
CORE(config-if)#ip pim version 2
CORE(config-if)#ip pim dense-mode
CORE(config-if)#ip cgmp
CORE(config)#ip multicast-routing
CORE(config)#interface vlan 99
CORE(config-if)#ip pim version 2
CORE(config-if)#ip pim dense-mode
CORE(config-if)#ip cgmp
Access Switch is L2 switch and didnt use any command for multicasting.
I configured the following command on the Core Switch and installed a
application for audio streaming LIVE CASTER.
when i select the audio file and assign the IP address on the user of
VLAN 22, the LIVE Caster starts the playing file but on the user of
VLAN 22 there is no respone.
I have debug ip cgmp , but didnt see any thing .
Where can be the problem? Where I need to make the changes ?
|
the problem here is that you dont have enough info to understand where
things are going wrong - so you need to do some testing to sort that out.
get it working locally within a single VLAN 1st. (if it doesnt the
application / pc / server / IP stack is broken so no point going on).
then try it with the devices connected directly to a single layer 3 switch -
use PIM v2 - i prefer sparse mode to make sure periodic flooding doesnt
cause problems..
check that the layer 3 switch is getting the group registrations and that
traffic is flowing in the hardware switching path - this is turned off by
default on a Catalyst 6500 running in IOS mode
once it works on a single L3 switch you can add more switches and make sure
the topology discovery and so on is working.
i would not use cgmp either (since it is cisco proprietary, and i havent
seen a good enough description to let me hunt a problem with a sniffer) - if
you must have layer 2 switches limiting where the streams go then maybe IGMP
snooping is better.
Finlly if you campus has vlans that cross a lot of trunks, remember that you
might get a copy of each stream in each vlan if there are recievers in each.
Regards
stephen_hope@xyzworld.com - replace xyz with ntl |
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Merv
Guest
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| Posted: Sun Apr 23, 2006 2:40 pm Post subject: Re: Multicasting b/w VLANs |
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| what value did you set the Time to Live (TTL) to ? |
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Mark Williams
Guest
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| Posted: Mon Apr 24, 2006 7:18 pm Post subject: Re: Multicasting b/w VLANs |
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Are you tried to stream the file to the IP address of the host on VLAN
22? That's not multicasting. The host on VLAN 22 should have a standard
IP address, and you should configure the multicasting application to
stream to a multicast address. You can safely use addresses in the
239.255.000.000-239.255.255.255 range.
Make sure that your receiving application is truly multicast compliant.
The 3550 and 2970 will probably have IGMP snooping enabled by default.
If the receiving application does not send out IGMP join requests, the
distribution and access switches will not forward multicast traffic out
the necessary ports.
Also check the TTL of the sending application. |
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