Peering port towards BKNIX Peering LAN can safely enter 'Maintenance Mode' which complies to 
BCP214 
BGP Session Culling is the
  practice of ensuring BGP sessions are forcefully torn down before
  commencing maintenance activities (that otherwise would affect the
  flow of data between the BGP speakers) on a lower-layer network.
  
  
This will apply bidirectional packet filter on BGP (TCP port 179) from source and destination addresses in 
BKNIX Public Peering Lan
    It is recommended to use this mode together with 
Graceful BGP Session Shutdown
Members can enable this mode before commencing maintenance activities via 
IXP Manager  to disrupt BGP control-plance traffic and BGP sessions will be expired.
It will trigger BGP rerouting process. Therefore, end-user traffic can subsequently be shifted to alternative links.

During maintenance period, members can safely remove physical link or send other traffic such as, ICMP to check the connectivities.
    

Once activities were complete and 'Maintenance Mode' was disabled, BGP sessions will automatically be restored.
