This integer is a second BGP Community value slot for this export policy, functioning identically to csExpPolBgpCommunity1 as documented by the MIB, including the same restriction that it cannot be set to 0 unless the first community value is also 0. An admin uses it when a route needs to carry two distinct community tags simultaneously, such as an operational community plus a well-known community. For example, setting csExpPolBgpCommunity1 to a custom tag and csExpPolBgpCommunity2 to 0xFFFFFF02 (NO-ADVERTISE) attaches both a custom marking and a suppression instruction to the same exported route.