[Xorp-users] Fwd: from and to blocks of policy terms

[Pavlin Radoslavov]

> >  > > For example, "from {} to {neighbor: 192.168.1.2} then {accept}"
> >  > > can't be used as an export policy, but can be used as an import
> >  > > policy. As an import policy, when the routes reach the outbound
> >  > > evaluation, only the routes to neighbor 192.168.1.2 will be
> >  > > accepted (i.e., transmitted).
> >  >
> >  >
> >  > If I understand you correctly, you are saying that if "from {} to {neighbor:
> >  > 192.168.1.2} then {accept}" were an IMPORT policy, then it would be
> >  > equivalent to the following EXPORT policy "from {protocol: bgp} to
> >  > {neighbor: 192.168.1.2} then {accept}"?
> >
> >  I believe the answer is yes.
> >  However, I should also say that it has been a while since I looked
> >  into the policy framework details so I could be wrong.
> 
> I tried the policy "from {} to {neighbor: X} then {accept}" as an
> import policy and it turns out that it is illegal, that is Xorp (1.4)
> rejects it and quits.

I am slowly starting to remember things...
Please try "from {neighbor: X} then {accept}" as an import policy.
The "to {}" block should apply to the outgoing branch of the control
path (inside BGP), and this information is not available when the
import policy is applied.

Pavlin