The value of tmnxMsdpPeerGroupMaxActSources specifies the
maximum number of source active messages that will be accepted by
this MSDP peer group. This effectively controls the number of
active sources that can be stored on the system.
By default, no limit is placed on the number of source active
messages and this is specified by the value '-1'. A value of
0 means that no source active messages will be accepted.