In its current configuration one of our Linux boxes has 2 DSL modems
that connect to the same service provider. On the router packets coming
in from the network destined for the internet are marked alternating
using nth match those packets are supposed to be picked up by iproute2
and routed out the physical connections based on that mark, thereby
doubling the outbound bandwidth. The problem is that only 1 of the DSL
modems gets used to send the traffic.
I have verified that the mark is being set. Apparently iproute2 is not
applying the policy routing correctly. Has anyone encountered similar
problems?
In a related but different problem the local box marks packets in a
similar manner using the output mangle chain but these marks are not
honored by iproute2. They are routed based on the default route in the
main table.(if no default route in main table they go nowhere)
The iproute2 rules are like :
ip ro add table 20 default dev ppp1
ip ru add fwmark 2 table 20
I feel like I am missing something that should be obvious. This box is
also doing NAT so is it possible that I am seeing some odd interaction?
Joe Gavin
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