The value of tBgpPrngPlcyMaxPrefix specifies the maximum
number of routes that can be learned from this peer.
A value of zero specifies that there is not limit to the number
of routes learned.
The tBgpMaxNgPrefixThreshReached notification is sent when
the number of routes exceeds a percentage of this limit as
specified by tBgpPrngPlcyMaxPrefixThreshold.
If the number of routes exceeds this limit, then
BGP peering will be disabled and the tBgpMaxNgPrefix100
notification will be sent.