On Tue, Oct 16, 2018 at 09:13:20AM +0200, open...@kene.nu wrote: > Hello, > > Only relying on OSPF hellos effectively makes it mimic BGP with its > keepalives. I will ponder the value of transporting the underlay in > OSPF, effectively transporting loopback peering addresses for BGP in > OSPF. I am not sure that it will make my life easier but will consider > it.
OSPF is generally faster at converging after reroute and it is possible to set the router-dead-time to minimal which will give you a 1 second timeout. Also the default of 40sec is lower than the 90sec of BGP. Additionally OSPF may give you multipath routes so the failover for BGP may be not noticable. Also GRE has a way to emulate link state but to be honest if I use OSPF on a GRE link I will not turn it on (unless requested). > Thanks for the quick replies everyone. You confirmed that I am not > entirely a moron. > > Still, having the ability to set rtlabels in ospfd would be nice. > On Mon, Oct 15, 2018 at 5:59 PM Stuart Henderson <s...@spacehopper.org> wrote: > > > > On 2018-10-15, open...@kene.nu <open...@kene.nu> wrote: > > > in theory. But when WAN links are composed of IPSEC and GRE (which > > > does not have link state) OSPF falls to pieces as the core idea of is > > > link-state. > > > > OSPF primarily uses hellos. Link-state is also used to speed up failover > > up but is not required. > > > > There was a bug in ospfd with DR selection that results in problems > > (specifically multiple routers thinking they were all DR) after a > > netsplit if there was no link-state change. This was already fixed > > though so if you are running 6.3+ and still seeing problems, please > > send a bug report with some information. > > > > > -- :wq Claudio
