Route Reflector issue

[Ondrej Zajicek]

On Tue, Jun 12, 2018 at 01:59:47PM +0200, Ondrej Zajicek wrote:
> On Tue, Jun 12, 2018 at 08:00:50AM +0530, knet solutions wrote:
> > Hi,
> > 
> > I am implementing this below topology (BGP IGP),
> > 
> > 
> > R1--------------------------------R2------------------------------------------R3
> > (192.168.2.2)              192.168.2.1/1.1                   192.168.1.2
> > 
> > Here
> > 
> > R1 and R3 are bird routers
> > R2 is RYU BGP Speaker (act as Route reflector).
> > 
> > This is not working as expected.  Bird routers(R1) sends error notification
> > to R2.
> > 
> > BIRD R
> > 
> > Attached the packet traces.  Can you help me to identify what went wrong?
> 
> Hi
> 
> Do you have any error messages in BIRD log?

Also according to pcap, it seems like mandatory NEXT_HOP attribute
is missing:

    Update Message (2), length: 48
      Originator ID (9), length: 4, Flags [O]: 192.168.1.1
      Cluster List (10), length: 4, Flags [O]: 192.168.1.1
      Origin (1), length: 1, Flags [T]: IGP
      AS Path (2), length: 0, Flags [T]: empty
      Updated routes:
        10.2.1.0/24

Although it is true that in such case BIRD should just handle the the
update as withdraw instaad of sending notification.

But in general, it seems like a bug in RYU BGP Speaker.

-- 
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."