[j-nsp] BGP export policy, group vs neighbor level

[Raph Tello]

I would also like to hear opinions about having ipv4 and ipv6 ebgp peer
sessions in the same group and using the same policy instead of having two
separate groups and two policies (I saw this kind policy at
https://bgpfilterguide.nlnog.net/guides/small_prefixes/#junos).

It would nicely pack things together. Could that be considered kind of new
best practice?

On Thu 3. Feb 2022 at 16:12, Raph Tello <telloraph at gmail.com> wrote:

> Hi list,
>
> I wonder what kind of bgp group configuration would allow me to change the
> import/export policy of a single neighbor without resetting the session of
> this neighbor nor any other session of other neighbors. Similar to
> enabling/disabling features on a single session without resetting the
> sessions of others.
>
> Let‘s say I have a bgp group IX-peers and each peer in that group has its
> own import/export policy statement but all reference the same policies. Now
> a single IX-peer needs a different policy which is going to change
> local-pref, so I would replace the policy chain of that peer with a
> different one.
>
> Would this cause a session reset because the peer would be moved out of
> the update group?
>
> (I wonder mainly about group>peer>policy vs. group>policy vs. each peer
> it‘s own group)
>
> - Tello
>