SCTP protocol issue in multi-homing.

[Vipul Singhania <vipsinghania%gmail.com@localhost>]

Hi All,

I have one setup which is using SCTP multi-homing.

Here is the test setup:

 Host 1        |   Host2        |
+----------------+-------------------|              | Test-server   |
|                  |    IF-1          |   path1   |                    |
| o--5.16.0.2----11.0.3.254   ---------------11.0.3.101--o  |
|                  \/                   |              |                    |
|                  /\   IF-2          |   path2   |                     |
| o--5.16.0.17---11.0.13.254  --------------11.0.13.101--o |
|                   |                    |             |                     |
+-----------------+-------------------|             +---------------+

In above setup Host 1 is having one endpoints and Test-server is
having other-endpoints.

Host1 is having cross connection to Host2 i.e. 5.16.0.2 can ping to
11.0.3.254 & 11.0.13.254 same for 5.16.0.17.

Now here path1 is active path & 5.16.0.2 is active endpoint.

For the SCTP communication and I can see the HEARTBEAT request
received on 5.16.0.17 and HB-ACK through 5.16.0.2 (I matched the
verification tag number in HB-ACK)

Now if i block the path1 then I can see that 5.16.0.2 is communication
to 11.0.13.101 (which is in path2).


Is this a valid case? If active endpoint is reachable through any path
it will use it? Or if path 1 is down the other endpoint need to take
active role?


Thanks & Regards.
--
-=vipsy
http://through-dlens.blogspot.in