Hi all,
I have a dual stacked (IPv4/IPv6) Linux host (S) with two interfaces that can both be used to reach a destination (D) and are both up. In order to make sure a packet is transmitted over the correct interface I use policy based routing to choose the correct routing table based on the IP source address.
The network setup is shown below:
|---|
| D |
|---|
|
|
|---|
| R |
|---|
/ \
/ \
|-------|
| S |
|-------|
The two interfaces of S both reside in a different IP subnet.
For IPv4 this works ok, but IPv6 does not seem to interact with the Routing Policy DataBase (RPDB) as explained in http://www.policyrouting.org/PolicyRoutingBook/ONLINE/CH09.web.html section 9.2. Here it is stated that this might be solved in the later releases of the Linux kernel 2.5 and further. I am using RH 9 (2.4.20-8), 2.4 based kernel so that might explain why it does not work but before I decide to move to a newer kernel release I hope someone can help me answer the following questions:
1. Does anyone know if Policy Based Routing in the way it is used here is supported by the newer Linux kernels for IPv6?
2. Can anyone think of another solution for this?
Greetz,
Boris Kock
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