Network Blip Friday 30th June 2023 12:07:59 am

We've just observed a network blip and we're investigating.

There has been no repeat of this and we are still investigating with Juniper. Planned work may be required in future following any suggestions they provide.

Posted 1 year ago

We cannot find any cause for the blip at this time but will continue investigation tomorrow.

Our setup has redundancy in mind (2 x of everything - routers, switches, uplinks) so further review will be needed to understand if this is a wider software issue on our router.

Juniper recently announced a bug with resetting of BGP sessions and the preventative measure has already been applied so this has been raised to their support also.

Posted 1 year ago

Our BGP session to transit upstreams appears to have flapped. When this occurs, it has to relearn all routes again which due to the volume (900k in v4 alone), can take several minutes.

Normally this would not be an issue as we have multiple sessions on each of our routers but our data shows all flapped at once.

Further investigation is taking place.

Posted 1 year ago