pf route-to?

[Ben Shelton]

Hi all,
I've got a little bit of an issue with pf and the route-to statement. 
We have 2 ISPs currently and I'd like to get both of the uplinks put on 
the freebsd box using pf to firewall/route for them.  I have a couple 
route-to rules set up but they don't seem to do much.  I'm sure I'm just 
missing some little detail here or misunderstanding exactly what 
route-to is doing but I can't find any examples.

I've got:

ISP1      ISP2
    |      |
    firewall
       |
    internal net

So the internal net has hosts on both ISP1 and ISP2's subnets and 
therefore has traffic to/from both ISPs travelling on it.  The firewall 
is the default router for both internal subnets (via aliases on the 
interface).  I have the pf rules:

pass in quick on $inside_int route to ( $ISP1_int $ISP1_router ) inet 
proto icmp from $ISP1_inside_net to any keep state
pass out quick on $ISP1_int route to ( $ISP1_int $ISP1_router ) inet 
proto icmp from $ISP1_inside_net to any keep state

It doesn't seem to work.  I do a tcpdump on $ICP1_int and don't see any 
traffic from a host inside, though I do see the traffic on $inside_int. 
  Something's not being routed properly.  I moved these two rules up 
pretty far in the ruleset to make sure they're not being dropped quick 
by anything else, but to no avail.  There are no antispoof rules here or 
anything, so that probably isn't a factor.
Any help is greatly appreciated.  I'm down to just banging my head on 
the box hoping it works (and it doesn't seem to be helping).

Later,
Ben