so this scenario was a much more scaled down version of the actual topology. Basically I have a "gap" of routers that I don't manage or have access to in between mine running eBGP. We are collecting some metrics and doing monitoring on the AS-PATH of the routes received, among other attributes, for both ends so losing some of this information is a problem. Again, I know the right answer here is to run iBGP across the IGP and I am fighting that fight but it got me looking for alternative solutions and figured I would see if anyone else ever had to come up with a creative solution before.
On Thu, Mar 6, 2014 at 4:09 PM, Saku Ytti <s...@ytti.fi> wrote: > On (2014-03-06 10:37 -0500), Bryan Ashley wrote: > > > My searches have come up a little short however I found a couple > references > > to using automatic-tag and as-path tag to carry this through. I cant > seem > > to find any Junos reference information on this so wanted to reach out to > > the ether and see if others have faced this situation before or have any > > other recommendations on solutions. > > I don't think JunOS supports this. > > It's bit of hack at any rate. It's not transporting AS_PATH, it's > transporting > single 16b ASN. > It's essentially abusing (some what well-defined and interoperable abuse) > 32b > tag field for this purpose. > > Maybe you could try to do some of this manually, set some tags, which > trigger > 'set then origin x', as-path-expand/prepend might be more challenging. > Recommendation for solution might be easier with rationale why you need to > transport origin+aspath over IGP. > > -- > ++ytti > >
