Best practices for redundant iBGP/eBGP route distribution? [bird 2.0.7]

Ondrej Zajicek santiago at crfreenet.org
Mon Dec 16 16:51:55 CET 2019


On Mon, Dec 16, 2019 at 04:45:25PM +0100, Nico Schottelius wrote:
> 
> Ondrej Zajicek <santiago at crfreenet.org> writes:
> > [...]
> > If you do not use IGP, then direct IBGP sessions may have some advantages,
> > namely they can react to link-down events.
> > [...]
> 
> Do you *not* consider iBGP an IGP? Because this would explain why the
> paragraph regarding recursive doesn't work for us:

No, IGPs are protocols like OSPF, which are designed for exchanging of
internal routing information.

OTOH, IBGP is designed for internal distribution of external routing
information.

BIRD even allows you to use different routing table for internal routes
(and for next hop resolution of BGP routes - IGP routing table) and for
external ones. But it uses the same by default.

-- 
Elen sila lumenn' omentielvo

Ondrej 'Santiago' Zajicek (email: santiago at crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."


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