I know a lot of networks do BGP filter. Is there any way to make sure
that a particular AS doesn't get filtered, such as listing with RADB or
ARIN's routing registry? I'm not sure how many networks actually use
these registries for their router configuration, so I don't know whether
it would be worth while to register or not.
Quite a few providers require you to filter, normally we only peer with
networks who register their routes in RIPE or RADB databases.
/Jesper
It depends of the service provider etc.
When we add new customer with his own AS and network, we (here) must:
- add his AS into our AS MACRO in RIPE data base, because a dozen
providers here and in Europe, just as (for example) MCI in USA use this
(and RADB) data base for the AS-based filtering;
- send this AS to some our peers and upstream provider because they build
AS-based filetsr manually (through it tends to the RIPE or RADB usage
instead)
- send the PREFIX (not AS) to some providers because they use prefix-based
filtering (at least UUnet does so).
(all this except (1) is doing by the programs, of course - we update RIPE
and generate everything from the RIPE).
I (personally) am thinking AS-based filtering is useless and it's safer
to do
PREFIX-based filtering instead, just with the COMMUNITY-based route
control. RELCOM does both PREFIX (always except upstream links) and AS
(sometimes) filtering.
This means _it's highly recommended to keep your network objects in the
registry data bases in order_. But it depends from the topology.
Alex.
Ok, ok. A short list:
(Country)-Provider Filter-Type Filter-Source
(USA) UUNET prefix manual
(USA) MCI prefix RA+RIPE+MCI DB
(USA) Sprint ??
(EU) EUnet AS manual (old info)
(EU) TELIA AS manual
(RU) RELCOM prefix(+AS) RIPE+internal DB
(RU) Sprint ??
(RU) Rostelecom prefix+AS RIPE
(RU) DEMOS AS RIPE
may be, someone can fill in such list with more up-to-date info?
Additional fields should be
- if local communities can be used for the LOCAL_PREF control
- which routes are preffered (customers, peering, upstream if any)
(USA) BBNplanet/GTEI prefix manual
(USA) Sprint AS manual
(DK) Tele Danmark AS manual/RIPE+RA
(DK) Tele2 AS manual
/Jesper
I know a lot of networks do BGP filter. Is there any way to make sure
that a particular AS doesn't get filtered, such as listing with RADB or
ARIN's routing registry? I'm not sure how many networks actually use
these registries for their router configuration, so I don't know whether
it would be worth while to register or not.
The promise of filtering from the IRR is that you can avoid the problems
created by bogus announcements.
The problem is that the information in the IRR doesn't bear enough
resemblance to reality for people who wish to take a full feed of
Internet routes and filter them. While some providers are good about
putting data into the IRR (or their portion of it), they often aren't
good about removing the data.
That said, on a peer to peer basis for a given peer's routes, there
isn't any reason why both peers can't agree to filter each other based
on data in the global IRR or their own local copies. Sanity enforced
at the local level can help protect against insanity at the global level.
I find it disturbing that route filtering, especially for the larger
providers, is still being configured manually.