Re: Direct protocol affects BGP
Yes, 'show route', is from Bird. I don't have route-reflector, but just two
routers which have a bgp session. Anyway, yes when direct is disabled, the
bgp session is established.
Il giorno mar 24 mar 2020 alle ore 21:45 Alexander Zubkov
ha scritto:
> "show route" looks a little weird, is it from bird? There are also
> commonly a protocol and metric shown.
> Those are from your route-reflector? Do you have your bgp sessions up
> when direct is disabled?
>
> On Tue, Mar 24, 2020 at 9:33 PM Fabiano D'Agostino
> wrote:
> >
> > Good evening Alexander,
> >
> > Direct protocol enabled:
> > 'route' command:
> > Destination Gateway GenmaskFlags Metric iface
> > 192.168.1.0 *255.255.255.0 U 0 enp0s3
> > 192.168.1.0 *255.255.255.0 U 32 enp0s3
> > 192.168.2.0 *255.255.255.0 U 0 enp0s8
> > 192.168.2.0 *255.255.255.0 U32 enp0s8
> > 192.168.4.0 *255.255.255.0 U32 enp0s8
> > 'show route' command:
> > 192.168.1.0/24 enp0s3
> > 192.168.2.0/24 enp0s8 via 192.168.2.22 on enp0s8
> > 192.168.4.0/24 via 192.168.2.22 on enp0s8
> >
> > Direct protocol disabled:
> > 'route' command:
> > Destination Gateway GenmaskFlags Metric iface
> > 192.168.1.0 *255.255.255.0 U 0 enp0s3
> > 192.168.2.0 *255.255.255.0 U 0 enp0s8
> > 'show route' command:
> > empty
> >
> > Thanks,
> >
> > Fabiano
> >
> > Il giorno mar 24 mar 2020 alle ore 21:00 Alexander Zubkov <
> gr...@qrator.net> ha scritto:
> >>
> >> I think it would be easier if you showed your route tables in both
> cases.
> >>
> >> On Tue, Mar 24, 2020 at 8:57 AM Irene Lalioti
> wrote:
> >> >
> >> > Hello guys!
> >> >
> >> > Just because today we encountered again the same issue with direct, I
> am very curious on this:
> >> >
> >> > I totally agree with what you guys explained about the need of the
> direct protocol. Once we set it then reachability works and all is ok.
> >> >
> >> > Our big question is why was it working before the moment it lost the
> BGP session?? In other words: the set up :
> >> >
> >> > RS - BGP session with the ROUTER - and behind the Router we have
> Caches.
> >> >
> >> > Before the router was announcing to the RS(BIRD v2.0.7) the caches
> and that they are reachable by the router. Without any direct.
> >> >
> >> > Until one day we lose the bgp session, and we can ping the caches
> from the RS but not reachable . Once we set it as direct on the bird then
> all is fine.
> >> >
> >> > Question is why was it working before without direct ?? :=)
> >> >
> >> > Many thanks for your time!
> >> >
> >> > Have a great day all!
> >> >
> >> > Irene.
> >> >
> >> > On 23/03/2020 17:07, Fabiano D'Agostino wrote:
> >> >
> >> > Hi Bernd,
> >> > no, the routing "from the kernel" doesn't come via 'learn yes', but
> via RIB, I mean if I do 'route' it shows the directly connected networks.
> The problem is that if I use the Direct protocol, the command 'route' shows
> me two same directly connected networks, one coming from RIB and the other
> one coming from Bird.
> >> > I tried protocol bgp { direct; }, but it doesn't change.
> >> >
> >> > Thanks,
> >> >
> >> > Fabiano
> >> >
> >> > Il giorno lun 23 mar 2020 alle ore 16:15 Bernd Naumann <
> b...@spreadshirt.net> ha scritto:
> >> >>
> >> >> On 23.03.20 16:01, Fabiano D'Agostino wrote:
> >> >> > Hi Benedikt,
> >> >> > I am just learning Bird and I didn't want to use the Direct
> protocol
> >> >> > because using it I have two same routes in the RIB for the directly
> >> >> > connected networks, one coming from the kernel and the second one
> coming
> >> >> > from the direct protocol.
> >> >>
> >> >>
> >> >> Is the routing "from the kernel" coming via `learn yes;`? If you
> have no
> >> >> need to import "alien" routes, you can disable `learn` and just use
> >> >> `direct` and `static` protocol. /* OR if you know that your neighbor
> is
> >> >> directly connected to you can also set 'direct' on the `protocol
> bgp`. */
> >> >>
> >> >> Bernd
> >> >>
> >> >>
> >> >
> >> > --
> >> > Irene Lalioti
> >> > Network Engineer
> >> > Fondation RESTENA
> >> > 2, avenue de l'Université
> >> > L-4365 Esch/Alzette
> >> >
> >> > Tel: +352 424409 1
> >> > Fax: +352 422473
>
Re: Direct protocol affects BGP
There is also no gateway in you "route" output on routes exported from
bird. Maybe you have some filters that causing it? Could you show your
config if it is not secret?
On Tue, Mar 24, 2020 at 9:53 PM Fabiano D'Agostino
wrote:
>
> Yes, 'show route', is from Bird. I don't have route-reflector, but just two
> routers which have a bgp session. Anyway, yes when direct is disabled, the
> bgp session is established.
>
> Il giorno mar 24 mar 2020 alle ore 21:45 Alexander Zubkov
> ha scritto:
>>
>> "show route" looks a little weird, is it from bird? There are also
>> commonly a protocol and metric shown.
>> Those are from your route-reflector? Do you have your bgp sessions up
>> when direct is disabled?
>>
>> On Tue, Mar 24, 2020 at 9:33 PM Fabiano D'Agostino
>> wrote:
>> >
>> > Good evening Alexander,
>> >
>> > Direct protocol enabled:
>> > 'route' command:
>> > Destination Gateway GenmaskFlags Metric iface
>> > 192.168.1.0 *255.255.255.0 U 0 enp0s3
>> > 192.168.1.0 *255.255.255.0 U 32 enp0s3
>> > 192.168.2.0 *255.255.255.0 U 0 enp0s8
>> > 192.168.2.0 *255.255.255.0 U32 enp0s8
>> > 192.168.4.0 *255.255.255.0 U32 enp0s8
>> > 'show route' command:
>> > 192.168.1.0/24 enp0s3
>> > 192.168.2.0/24 enp0s8 via 192.168.2.22 on enp0s8
>> > 192.168.4.0/24 via 192.168.2.22 on enp0s8
>> >
>> > Direct protocol disabled:
>> > 'route' command:
>> > Destination Gateway GenmaskFlags Metric iface
>> > 192.168.1.0 *255.255.255.0 U 0 enp0s3
>> > 192.168.2.0 *255.255.255.0 U 0 enp0s8
>> > 'show route' command:
>> > empty
>> >
>> > Thanks,
>> >
>> > Fabiano
>> >
>> > Il giorno mar 24 mar 2020 alle ore 21:00 Alexander Zubkov
>> > ha scritto:
>> >>
>> >> I think it would be easier if you showed your route tables in both cases.
>> >>
>> >> On Tue, Mar 24, 2020 at 8:57 AM Irene Lalioti
>> >> wrote:
>> >> >
>> >> > Hello guys!
>> >> >
>> >> > Just because today we encountered again the same issue with direct, I
>> >> > am very curious on this:
>> >> >
>> >> > I totally agree with what you guys explained about the need of the
>> >> > direct protocol. Once we set it then reachability works and all is ok.
>> >> >
>> >> > Our big question is why was it working before the moment it lost the
>> >> > BGP session?? In other words: the set up :
>> >> >
>> >> > RS - BGP session with the ROUTER - and behind the Router we have Caches.
>> >> >
>> >> > Before the router was announcing to the RS(BIRD v2.0.7) the caches and
>> >> > that they are reachable by the router. Without any direct.
>> >> >
>> >> > Until one day we lose the bgp session, and we can ping the caches from
>> >> > the RS but not reachable . Once we set it as direct on the bird then
>> >> > all is fine.
>> >> >
>> >> > Question is why was it working before without direct ?? :=)
>> >> >
>> >> > Many thanks for your time!
>> >> >
>> >> > Have a great day all!
>> >> >
>> >> > Irene.
>> >> >
>> >> > On 23/03/2020 17:07, Fabiano D'Agostino wrote:
>> >> >
>> >> > Hi Bernd,
>> >> > no, the routing "from the kernel" doesn't come via 'learn yes', but via
>> >> > RIB, I mean if I do 'route' it shows the directly connected networks.
>> >> > The problem is that if I use the Direct protocol, the command 'route'
>> >> > shows me two same directly connected networks, one coming from RIB and
>> >> > the other one coming from Bird.
>> >> > I tried protocol bgp { direct; }, but it doesn't change.
>> >> >
>> >> > Thanks,
>> >> >
>> >> > Fabiano
>> >> >
>> >> > Il giorno lun 23 mar 2020 alle ore 16:15 Bernd Naumann
>> >> > ha scritto:
>> >> >>
>> >> >> On 23.03.20 16:01, Fabiano D'Agostino wrote:
>> >> >> > Hi Benedikt,
>> >> >> > I am just learning Bird and I didn't want to use the Direct protocol
>> >> >> > because using it I have two same routes in the RIB for the directly
>> >> >> > connected networks, one coming from the kernel and the second one
>> >> >> > coming
>> >> >> > from the direct protocol.
>> >> >>
>> >> >>
>> >> >> Is the routing "from the kernel" coming via `learn yes;`? If you have
>> >> >> no
>> >> >> need to import "alien" routes, you can disable `learn` and just use
>> >> >> `direct` and `static` protocol. /* OR if you know that your neighbor is
>> >> >> directly connected to you can also set 'direct' on the `protocol bgp`.
>> >> >> */
>> >> >>
>> >> >> Bernd
>> >> >>
>> >> >>
>> >> >
>> >> > --
>> >> > Irene Lalioti
>> >> > Network Engineer
>> >> > Fondation RESTENA
>> >> > 2, avenue de l'Université
>> >> > L-4365 Esch/Alzette
>> >> >
>> >> > Tel: +352 424409 1
>> >> > Fax: +352 422473
Re: Direct protocol affects BGP
Good evening Alexander,
Direct protocol enabled:
'route' command:
Destination Gateway GenmaskFlags Metric iface
192.168.1.0 *255.255.255.0 U 0 enp0s3
192.168.1.0 *255.255.255.0 U 32 enp0s3
192.168.2.0 *255.255.255.0 U 0 enp0s8
192.168.2.0 *255.255.255.0 U32 enp0s8
192.168.4.0 *255.255.255.0 U32 enp0s8
'show route' command:
192.168.1.0/24 enp0s3
192.168.2.0/24 enp0s8 via 192.168.2.22 on enp0s8
192.168.4.0/24 via 192.168.2.22 on enp0s8
Direct protocol disabled:
'route' command:
Destination Gateway GenmaskFlags Metric iface
192.168.1.0 *255.255.255.0 U 0 enp0s3
192.168.2.0 *255.255.255.0 U 0 enp0s8
'show route' command:
empty
Thanks,
Fabiano
Il giorno mar 24 mar 2020 alle ore 21:00 Alexander Zubkov
ha scritto:
> I think it would be easier if you showed your route tables in both cases.
>
> On Tue, Mar 24, 2020 at 8:57 AM Irene Lalioti
> wrote:
> >
> > Hello guys!
> >
> > Just because today we encountered again the same issue with direct, I am
> very curious on this:
> >
> > I totally agree with what you guys explained about the need of the
> direct protocol. Once we set it then reachability works and all is ok.
> >
> > Our big question is why was it working before the moment it lost the BGP
> session?? In other words: the set up :
> >
> > RS - BGP session with the ROUTER - and behind the Router we have Caches.
> >
> > Before the router was announcing to the RS(BIRD v2.0.7) the caches and
> that they are reachable by the router. Without any direct.
> >
> > Until one day we lose the bgp session, and we can ping the caches from
> the RS but not reachable . Once we set it as direct on the bird then all is
> fine.
> >
> > Question is why was it working before without direct ?? :=)
> >
> > Many thanks for your time!
> >
> > Have a great day all!
> >
> > Irene.
> >
> > On 23/03/2020 17:07, Fabiano D'Agostino wrote:
> >
> > Hi Bernd,
> > no, the routing "from the kernel" doesn't come via 'learn yes', but via
> RIB, I mean if I do 'route' it shows the directly connected networks. The
> problem is that if I use the Direct protocol, the command 'route' shows me
> two same directly connected networks, one coming from RIB and the other one
> coming from Bird.
> > I tried protocol bgp { direct; }, but it doesn't change.
> >
> > Thanks,
> >
> > Fabiano
> >
> > Il giorno lun 23 mar 2020 alle ore 16:15 Bernd Naumann <
> b...@spreadshirt.net> ha scritto:
> >>
> >> On 23.03.20 16:01, Fabiano D'Agostino wrote:
> >> > Hi Benedikt,
> >> > I am just learning Bird and I didn't want to use the Direct protocol
> >> > because using it I have two same routes in the RIB for the directly
> >> > connected networks, one coming from the kernel and the second one
> coming
> >> > from the direct protocol.
> >>
> >>
> >> Is the routing "from the kernel" coming via `learn yes;`? If you have no
> >> need to import "alien" routes, you can disable `learn` and just use
> >> `direct` and `static` protocol. /* OR if you know that your neighbor is
> >> directly connected to you can also set 'direct' on the `protocol bgp`.
> */
> >>
> >> Bernd
> >>
> >>
> >
> > --
> > Irene Lalioti
> > Network Engineer
> > Fondation RESTENA
> > 2, avenue de l'Université
> > L-4365 Esch/Alzette
> >
> > Tel: +352 424409 1
> > Fax: +352 422473
>
Re: Direct protocol affects BGP
I think it would be easier if you showed your route tables in both cases.
On Tue, Mar 24, 2020 at 8:57 AM Irene Lalioti wrote:
>
> Hello guys!
>
> Just because today we encountered again the same issue with direct, I am very
> curious on this:
>
> I totally agree with what you guys explained about the need of the direct
> protocol. Once we set it then reachability works and all is ok.
>
> Our big question is why was it working before the moment it lost the BGP
> session?? In other words: the set up :
>
> RS - BGP session with the ROUTER - and behind the Router we have Caches.
>
> Before the router was announcing to the RS(BIRD v2.0.7) the caches and that
> they are reachable by the router. Without any direct.
>
> Until one day we lose the bgp session, and we can ping the caches from the RS
> but not reachable . Once we set it as direct on the bird then all is fine.
>
> Question is why was it working before without direct ?? :=)
>
> Many thanks for your time!
>
> Have a great day all!
>
> Irene.
>
> On 23/03/2020 17:07, Fabiano D'Agostino wrote:
>
> Hi Bernd,
> no, the routing "from the kernel" doesn't come via 'learn yes', but via RIB,
> I mean if I do 'route' it shows the directly connected networks. The problem
> is that if I use the Direct protocol, the command 'route' shows me two same
> directly connected networks, one coming from RIB and the other one coming
> from Bird.
> I tried protocol bgp { direct; }, but it doesn't change.
>
> Thanks,
>
> Fabiano
>
> Il giorno lun 23 mar 2020 alle ore 16:15 Bernd Naumann
> ha scritto:
>>
>> On 23.03.20 16:01, Fabiano D'Agostino wrote:
>> > Hi Benedikt,
>> > I am just learning Bird and I didn't want to use the Direct protocol
>> > because using it I have two same routes in the RIB for the directly
>> > connected networks, one coming from the kernel and the second one coming
>> > from the direct protocol.
>>
>>
>> Is the routing "from the kernel" coming via `learn yes;`? If you have no
>> need to import "alien" routes, you can disable `learn` and just use
>> `direct` and `static` protocol. /* OR if you know that your neighbor is
>> directly connected to you can also set 'direct' on the `protocol bgp`. */
>>
>> Bernd
>>
>>
>
> --
> Irene Lalioti
> Network Engineer
> Fondation RESTENA
> 2, avenue de l'Université
> L-4365 Esch/Alzette
>
> Tel: +352 424409 1
> Fax: +352 422473
Re: Direct protocol affects BGP
There is no gateway because they are directly connected. However my network
topology is the following:
[pc-a - router1 ]=AS 1 ; [pc-b - router 2]=AS 2;
pc-a:
enp0s3
address 192.168.1.11
gw 192.168.1.1
router1:
enp0s3
address 192.168.1.1
enp0s8
192.168.2.2
router1 bgp configuration:
protocol bgp {
ipv4 {
import all;
export all;
}
local as 1;
neighbor 192.168.2.22 as 2
Il giorno mar 24 mar 2020 alle ore 22:40 Alexander Zubkov
ha scritto:
> There is also no gateway in you "route" output on routes exported from
> bird. Maybe you have some filters that causing it? Could you show your
> config if it is not secret?
>
> On Tue, Mar 24, 2020 at 9:53 PM Fabiano D'Agostino
> wrote:
> >
> > Yes, 'show route', is from Bird. I don't have route-reflector, but just
> two routers which have a bgp session. Anyway, yes when direct is disabled,
> the bgp session is established.
> >
> > Il giorno mar 24 mar 2020 alle ore 21:45 Alexander Zubkov <
> gr...@qrator.net> ha scritto:
> >>
> >> "show route" looks a little weird, is it from bird? There are also
> >> commonly a protocol and metric shown.
> >> Those are from your route-reflector? Do you have your bgp sessions up
> >> when direct is disabled?
> >>
> >> On Tue, Mar 24, 2020 at 9:33 PM Fabiano D'Agostino
> >> wrote:
> >> >
> >> > Good evening Alexander,
> >> >
> >> > Direct protocol enabled:
> >> > 'route' command:
> >> > Destination Gateway GenmaskFlags Metric iface
> >> > 192.168.1.0 *255.255.255.0 U 0 enp0s3
> >> > 192.168.1.0 *255.255.255.0 U 32 enp0s3
> >> > 192.168.2.0 *255.255.255.0 U 0 enp0s8
> >> > 192.168.2.0 *255.255.255.0 U32 enp0s8
> >> > 192.168.4.0 *255.255.255.0 U32 enp0s8
> >> > 'show route' command:
> >> > 192.168.1.0/24 enp0s3
> >> > 192.168.2.0/24 enp0s8 via 192.168.2.22 on enp0s8
> >> > 192.168.4.0/24 via 192.168.2.22 on enp0s8
> >> >
> >> > Direct protocol disabled:
> >> > 'route' command:
> >> > Destination Gateway GenmaskFlags Metric iface
> >> > 192.168.1.0 *255.255.255.0 U 0 enp0s3
> >> > 192.168.2.0 *255.255.255.0 U 0 enp0s8
> >> > 'show route' command:
> >> > empty
> >> >
> >> > Thanks,
> >> >
> >> > Fabiano
> >> >
> >> > Il giorno mar 24 mar 2020 alle ore 21:00 Alexander Zubkov <
> gr...@qrator.net> ha scritto:
> >> >>
> >> >> I think it would be easier if you showed your route tables in both
> cases.
> >> >>
> >> >> On Tue, Mar 24, 2020 at 8:57 AM Irene Lalioti <
> irene.lali...@restena.lu> wrote:
> >> >> >
> >> >> > Hello guys!
> >> >> >
> >> >> > Just because today we encountered again the same issue with
> direct, I am very curious on this:
> >> >> >
> >> >> > I totally agree with what you guys explained about the need of the
> direct protocol. Once we set it then reachability works and all is ok.
> >> >> >
> >> >> > Our big question is why was it working before the moment it lost
> the BGP session?? In other words: the set up :
> >> >> >
> >> >> > RS - BGP session with the ROUTER - and behind the Router we have
> Caches.
> >> >> >
> >> >> > Before the router was announcing to the RS(BIRD v2.0.7) the caches
> and that they are reachable by the router. Without any direct.
> >> >> >
> >> >> > Until one day we lose the bgp session, and we can ping the caches
> from the RS but not reachable . Once we set it as direct on the bird then
> all is fine.
> >> >> >
> >> >> > Question is why was it working before without direct ?? :=)
> >> >> >
> >> >> > Many thanks for your time!
> >> >> >
> >> >> > Have a great day all!
> >> >> >
> >> >> > Irene.
> >> >> >
> >> >> > On 23/03/2020 17:07, Fabiano D'Agostino wrote:
> >> >> >
> >> >> > Hi Bernd,
> >> >> > no, the routing "from the kernel" doesn't come via 'learn yes',
> but via RIB, I mean if I do 'route' it shows the directly connected
> networks. The problem is that if I use the Direct protocol, the command
> 'route' shows me two same directly connected networks, one coming from RIB
> and the other one coming from Bird.
> >> >> > I tried protocol bgp { direct; }, but it doesn't change.
> >> >> >
> >> >> > Thanks,
> >> >> >
> >> >> > Fabiano
> >> >> >
> >> >> > Il giorno lun 23 mar 2020 alle ore 16:15 Bernd Naumann <
> b...@spreadshirt.net> ha scritto:
> >> >> >>
> >> >> >> On 23.03.20 16:01, Fabiano D'Agostino wrote:
> >> >> >> > Hi Benedikt,
> >> >> >> > I am just learning Bird and I didn't want to use the Direct
> protocol
> >> >> >> > because using it I have two same routes in the RIB for the
> directly
> >> >> >> > connected networks, one coming from the kernel and the second
> one coming
> >> >> >> > from the direct protocol.
> >> >> >>
> >> >> >>
> >> >> >> Is the routing "from the kernel" coming via `learn yes;`? If you
> have no
> >> >> >> need to import "alien" routes, you can disable `learn` and just
> use
>
