8. Manageability Considerations

If the BGP4-MIB [RFC4273] is supported, there are no additional manageability concerns that arise from the use of four-octet AS numbers, since the InetAutonomousSystemNumber textual convention [RFC4001] is defined as Unsigned32.

When IP Flow Information Export (IPFIX) [RFC5101] is supported, there are no additional manageability concerns that arise from the use of four-octet AS numbers. The bgpSourceAsNumber and bgpDestinationAsNumber information elements [IANA-IPFIX] can continue to be used, with a new template record, specifying the new length of 4 bytes.