[Linux-cluster] Multicasting problems

[Steven Dake]

On Tue, 2009-09-08 at 17:34 -0500, Alan A wrote:
> It has come to the point where our cluster production configuration
> has halted due to the unexpected issues with multicasting on LAN/WAN.
> 
> The problem is that the firewall enabled on the switch ports does not
> support multicasting, and between cluster nodes and the routers lays
> firewall.
> 
> Nodes -> Switch with integrated Firewall devices -> Router
> 
> We are aware of problems encountered with Cisco switches and are
> trying to clear some things. For instance in RHEL Knowledgebase
> article 5933 it states:
> 
> 
> The recommended method is to enable multicast routing for a given vlan
> so that the Catalyst will act as the IGMP querier. This consists of
> the following steps:
> 
>  
> 
>      1. Enabling multicast on the switch globally
>         
>      2. Choosing the vlan the cluster nodes are using
>         
>      3. Turning on PIM routing for that subnet
>         
> 
> My Questions:
> 
> Can we enable PIM routing on the Server NIC itself without using
> dedicated network device? Meaning IGMP multicast would be managed by
> the NIC's itself from each node, can the nodes awarnes function this
> way?
> 
> Any suggestions on how to get around firewall issue without purchesing
> firewalls with routing tables?
> 
> Cisco switch model is: switch 6509 running 12.2(18) SXF and IGMP v2.
> 

I'm afraid only Cisco (and maybe some Cisco experts on this list) knows
the answers to your questions.  I suggest you contact your Cisco TAC for
advice on configuring their products.  They can help you achieve best
results.

Regards
-steve


> 
> 
> -- 
> Alan A.
> --
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