Represents the Network Address prefix carried in the
BGP UPDATE messages. In the following table, column
'Type' gives the kind of Network Layer address which
will be stored in the object of this type based on the
values of Address Family Identifier(AFI) and SAFI.
AFI SAFI Type
ipv4(1) unicast(1) IPv4 address
ipv4(1) multicast(2) IPv4 address
ipv4(1) vpn(128) VPN-IPv4 address
ipv6(2) unicast(1) IPv6 address
ipv6(2) multicast(2) IPv6 address
ipv6(2) vpn(128) VPN-IPv6 address
A VPN-IPv4 address is a 12-byte quantity, beginning
with an 8-byte 'Route Distinguisher (RD)' and ending
with a 4-byte IPv4 address.
A VPN-IPv6 address is a 24-byte quantity, beginning
with an 8-byte 'Route Distinguisher (RD)' and ending
with a 16-byte IPv6 address.
CbgpSafi
enumeration
Subsequent Address Family Identifier(SAFI) is used
by BGP speaker to indicate the type of the the Network
Layer Reachability Information(NLRI) being carried.
RFC-2858 has defined the following values for SAFI.
1 - Network Layer Reachability Information used for
unicast forwarding
2 - Network Layer Reachability Information used for
multicast forwarding
3 - Network Layer Reachability Information used for
both unicast and multicast forwarding.
SAFI values 128 through 255 are for private use.