[j-nsp] Junos BGP update generation inefficiency -cause for concern?

[Jeff Haas]

> On May 18, 2015, at 8:08 AM, Julien Goodwin <jgoodwin at studio442.com.au> wrote:
> 
> On 18/05/15 21:49, Saku Ytti wrote:
>> The update-groups are created dynamically in JunOS as far as I know.
>> That is if you have BGP group where neighbors have unique export
>> policies, you will have multiple update-groups in configuration group.
>> But I guess if you have two neighbors with same export policies in
>> different configuration group, it likely won't share same
>> update-group, haven't tested though.
> 
> I believe the "two groups same policies" do get two update-groups.

That's right.

> I'm not sure about "neighbor with neighbor level policy the same as the
> group level" case though.

Most neighbor level policy changes will split the groups.

When in doubt, use "show bgp groups".  It will show more than one group of the same name when the group gets internally split by such configuration.

-- Jeff