Re: One group across LAN's

- You could run 2 GossipRouters
- Include the 2 external addresses in TCPPING, e.g. 
initial_hosts=A[7800],B[7800]. When a member from the local multicast 
group which represents B crashes or leaves, another member will join the 
TCP group and have address B:7800

Lars George wrote:
> Hi Bela,
>
> I do have another question related to the topic now that I am trying 
> to implement it. How do I best set up the TCP group between the two 
> separate locations? I mean, with the TCP protocol layers, you have to 
> have well know hosts on either side so that they can connect to each 
> other. I have two locations, each has for example 10 servers using a 
> internal LAN address. The firewalls do the NAT so that each location 
> has only one external "official" IP address. How would I have to set 
> it up so that the two coordinators as discussed of the local LAN UDP 
> multicast groups (using view[0] as you explained below) can join a TCP 
> group across the internet without them knowing each other really?
>
> I assume, a gossip server outside the firewall may help, but then we 
> are back to the single point of failure scenario. I am confused as how 
> to achieve this?
>
> I assume this is along the G2G project question you have been asked 
> just recently.

-- 
Bela Ban
Lead JGroups / Manager JBoss Clustering Group
JBoss - a division of Red Hat

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