Running Bird bgp through GRE tunnel

[Ajay Raut ( Tech Ops )]

Hi Baptiste,

Thanks for the Response,

Done the changes as you specified on gre-vpn interface configuration.

auto gre-vpn
iface gre-vpn inet tunnel
        mode gre
        address 10.200.206.249
        endpoint 10.200.206.4
        local   10.200.206.5
        ttl 255
        netmask 255.255.255.254





*Birdc status*

BIRD 1.4.5 ready.
bird> show protocols all v1
name     proto    table    state  since       info
v1       BGP      master   start  21:28:24    Active        Socket: No
route to host
  Preference:     100
  Input filter:   ACCEPT
  Output filter:  ACCEPT
  Routes:         0 imported, 0 exported, 0 preferred
  Route change stats:     received   rejected   filtered    ignored
accepted
    Import updates:              0          0          0
0          0
    Import withdraws:            0          0        ---
0          0
    Export updates:              0          0          0
---          0
    Export withdraws:            0        ---        ---
---          0
  BGP state:          Active
    Neighbor address: 10.200.206.250
    Neighbor AS:      65531
    Start delay:      5/5
    Last error:       Socket: No route to host




*Bird Configuration*

protocol kernel {
persist; # Don't remove routes on bird shutdown
scan time 20; # Scan kernel routing table every 20 seconds
export all; # Default is export none
}

protocol direct direct1 {
export all;
}

protocol device {
scan time 10; # Scan interfaces every 10 seconds
export all;
}

protocol bgp v1 {
#table clos;
local as 65530;
source address 10.200.206.249;
neighbor 10.200.206.250 as 65531;
multihop  10;
import all;
export all;
}



*Logs:*15-09-09 21:31:50 <TRACE> v1: Initializing
2015-09-09 21:31:50 <TRACE> v1: Starting
2015-09-09 21:31:50 <TRACE> v1: State changed to start
2015-09-09 21:31:50 <TRACE> v1: Started
2015-09-09 21:31:50 <TRACE> v1: Connect delayed by 5 seconds
2015-09-09 21:31:55 <TRACE> v1: Connecting to 10.200.206.250 from local
address 10.200.206.249
2015-09-09 21:31:55 <TRACE> v1: Connection lost (No route to host)
2015-09-09 21:31:55 <TRACE> v1: Connect delayed by 5 seconds
2015-09-09 21:31:59 <TRACE> v1: Connecting to 10.200.206.250 from local
address 10.200.206.249
2015-09-09 21:31:59 <TRACE> v1: Connection lost (No route to host)
2015-09-09 21:31:59 <TRACE> v1: Connect delayed by 5 seconds
2015-09-09 21:32:05 <TRACE> v1: Connecting to 10.200.206.250 from local
address 10.200.206.249
2015-09-09 21:32:05 <TRACE> v1: Connection lost (No route to host)
2015-09-09 21:32:05 <TRACE> v1: Connect delayed by 5 seconds



Though i see the same issue of No Route to host, Please let me know which
part i have missed here.


Thanks,
Ajay


On Tue, Sep 8, 2015 at 1:06 AM, Baptiste Jonglez <
baptiste at bitsofnetworks.org> wrote:

> Hi,
>
> On Mon, Sep 07, 2015 at 08:33:15PM +0530, Ajay Raut ( Tech Ops ) wrote:
> > I m trying to run BGP through the GRE tunnel, Tunnel is working fine.
>
> > auto gre-vpn
> > iface gre-vpn inet tunnel
> >     address 10.200.206.249
> >     mode gre
> >     endpoint 10.200.206.6
> >     dstaddr 10.200.206.250
> >     local 10.200.206.4
> >     ttl 255
> >     netmask 255.255.255.252
>
> You have redundant information here: "dstaddr 10.200.206.250" will insert
> a /32 route towards 10.200.206.250.  But since you configured
> 10.200.206.249/30 on the interface, you should already be able to reach
> 10.200.206.250, since the kernel will create the route 10.200.206.248/30
> through the tunnel.
>
> This could be the source of your issue, since (IIRC) Bird sometimes has
> trouble with peers that are reachable with a /32 route.
>
> If removing the /32 route doesn't work, maybe adding a "protocol device"
> and "protocol direct" would solve the issue.
>
> Baptiste
>

-- 


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