187
MP-BGP uses these two attributes to advertise feasible and unfeasible routes for different network
layer protocols. BGP speakers not supporting MP-BGP ignore updates containing these attributes
and do not forward them to its peers.
The current MP-BGP implementation supports multiple protocol extensions, including VPN, IPv6,
and multicast. For more information about VPN, see MPLS Configuration Guide.
Address family
MP-BGP uses address families and subsequent address families to identify different network layer
protocols for routes contained in the MP_REACH_NLRI and MP_UNREACH_NLRI attributes. For
example, an Address Family Identifier (AFI) of 2 and a Subsequent Address Family Identifier (SAFI)
of 1 identify IPv6 unicast routing information carried in the MP_REACH_NLRI attribute. For address
family values, see RFC 1700.
BGP configuration views
BGP uses different views to manage routing information for different address families and different
VPN instances. Most BGP commands are available in all BGP views. BGP supports multiple VPN
instances by establishing a separate routing table for each VPN instance.
Table 14 de
scribes different BGP configuration views.
Table 14 BGP configuration views
View names Ways to enter the views Remarks
BGP view
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp]
Configurations in this view apply to
all address families of the public
network and all VPN instances
(such as confederation, GR, and
logging configurations), or apply to
all address families of the public
network.
BGP IPv4 unicast address
family view
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] address-family
ipv4 unicast
[Sysname-bgp-ipv4]
Configurations in this view apply to
IPv4 unicast routes and peers on the
public network.
BGP IPv6 unicast address
family view
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] address-family
ipv6 unicast
[Sysname-bgp-ipv6]
Configurations in this view apply to
IPv6 unicast routes and peers on the
public network.
BGP VPNv4 address family
view
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] address-family
vpnv4
[Sysname-bgp-vpnv4]
Configurations in this view apply to
VPNv4 routes and peers.
For more information about BGP
VPNv4 address family view, see
MPLS Configuration Guide.
BGP VPNv6 address family
view
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] address-family
vpnv6
[Sysname-bgp-vpnv6]
Configurations in this view apply to
VPNv6 routes and peers.
For more information about BGP
VPNv6 address family view, see
MPLS Configuration Guide.