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BGP multi-instance
A BGP router can run multiple BGP processes. Each BGP process corresponds to a BGP instance.
BGP maintains an independent routing table for each BGP instance.
You can create multiple public address families for a BGP instance. However, each public address
family (except for public IPv4 unicast, public VPNv4, and public VPNv6 address families) can belong
to only one BGP instance.
You can create multiple VPN instances for a BGP instance, and each VPN instance can have
multiple address families. A VPN instance can belong to only one BGP instance.
Different BGP instances can have the same AS number but cannot have the same name.
BGP configuration views
BGP uses different views to manage routing information for different BGP instances, address
families, and 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 16 describes different BGP configuration views.
Table 16 BGP configuration views
BGP instance view
<Sysname> system-view
[Sysname] bgp 100 instance abc
[Sysname-bgp-abc]
You can create a BGP instance and
enter its view by specifying the
instance
keyword in the
bgp
command.
Configurations in this view apply to
all public address families for the
specified BGP instance and all VPN
instances (such as confederation,
GR, and logging configurations), or
apply to all public address families
for the specified BGP instance.
BGP IPv4 unicast address
family view
<Sysname> system-view
[Sysname] bgp 100 instance abc
[Sysname-bgp-abc]
address-family ipv4 unicast
[Sysname-bgp-abc-ipv4]
Configurations in this view apply to
public IPv4 unicast routes and peers
of the specified BGP instance.
BGP IPv6 unicast address
family view
<Sysname> system-view
[Sysname] bgp 100 instance abc
[Sysname-bgp-abc]
address-family ipv6 unicast
Configurations in this view apply to
public IPv6 unicast routes and peers
of the specified BGP instance.
BGP IPv4 multicast address
family view
<Sysname> system-view
[Sysname] bgp 100 instance abc
[Sysname-bgp-abc]
address-family ipv4 multicast
[Sysname-bgp-abc-mul-ipv4]
Configurations in this view apply to
IPv4 multicast routes and peers of
the specified BGP instance.
BGP IPv6 multicast address
family view
<Sysname> system-view
[Sysname] bgp 100 instance abc
[Sysname-bgp-abc]
address-family ipv6 multicast
[Sysname-bgp-abc-mul-ipv6]
Configurations in this view apply to
IPv6 multicast routes and peers of
the specified BGP instance.
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