based on BGP Peer State Check by Thomas Wollner (see https://exchange.checkmk.com/p/bgp-peer)
Rewritten for CMK 2.x by thl-cmk[at]outlook[dot]com
This plugin uses the standard BGP4 MIB to monitor BGP peers. The plugin consists of two parts
performance data include
FMS last change/transitions
Last update received
Peer uptime
Total messages received/send
Updates received/send
It is the base for my other vendor specific BGP peer checks: