[Xorp-hackers] register_vif ifindex

[Pavlin Radoslavov]

Ben Greear <greearb at candelatech.com> wrote:

> It seems that register_vif uses the PifIndex of another
> 'real' port in the router.  Should it perhaps use the pimreg
> port, or just have a 0 like the discard interface?

KAME-derived IPv6 kernels require that the register_vif has a valid
physical interface index, hence it is not set to 0.
Also, have in mind that the Linux-specific pimreg kernel interface
is created _after_ the MFEA's setsockopt(MRT_ADD_VIF) for the
VIFF_REGISTER multicast interface. I.e., it is not available when
MfeaNode::add_pim_register_vif() is called.

Pavlin

> root at lanforge-nec-demo> show mfea interface
> Interface    State    Vif/PifIndex Addr            Flags
> 1.2.2        UP               0/84 10.1.2.2        MULTICAST BROADCAST KERN_UP
> 2.3.2        UP               1/86 10.2.3.2        MULTICAST BROADCAST KERN_UP
> br2          UP               2/73 10.2.2.2        MULTICAST BROADCAST KERN_UP
> my_discard   DISABLED          3/0                 KERN_UP
> register_vif UP               4/73 10.2.2.2        PIM_REGISTER KERN_UP
> root at lanforge-nec-demo>
> 
> -- 
> Ben Greear <greearb at candelatech.com>
> Candela Technologies Inc  http://www.candelatech.com
> 
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