Hi,
this KB article just came in:
https://kb.juniper.net/InfoCenter/index?page=content&id=KB12008&actp=SUBSCRIPTION
Symptoms:
Why does modifying a policy on a BGP neighbor in a group cause that
particular peer to be reset, when another policy is applied for the
whole peer group?
Solution:
Changing the export policy on a member (peer) in a group will cause that
member to be reset, as there is no graceful way to modify a group
parameter for a particular peer. Junos can gracefully change the export
policy, only when it is applied to the complete group.
It's not much helpful but just provides a confirmation.
Kind regards,
Andrey
Raph Tello via juniper-nsp писал(а) 2022-02-04 09:33:
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 <[email protected]> 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
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