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In certain network environments (for example, a Hub&Spoke network in MPLS L3VPN), however, the
AS_PATH attribute of a route from a peer must be allowed to contain the local AS number. Otherwise, the
route cannot be advertised correctly.
To permit the local AS number to appear in routes from a peer or peer group and specify the appearance
times (IPv4 unicast/multicast address family):
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter BGP IPv4 unicast
address family view,
BGP-VPN IPv4 unicast
address family view, or
BGP IPv4 multicast
address family view.
•
Enter BGP IPv4 unicast address family
view:
a.
bgp
as-number
b.
address-family ipv4
[
unicast
]
•
Enter BGP-VPN IPv4 unicast address
family view:
a.
bgp
as-number
b.
ip vpn-instance
vpn-instance-name
c.
address-family ipv4
[
unicast
]
•
Enter BGP IPv4 multicast address family
view:
a.
bgp
as-number
b.
address-family ipv4 multicast
N/A
3.
Permit the local AS
number to appear in
routes from a peer or
peer group and specify
the appearance times.
peer
{
group-name
|
ip-address
}
allow-as-loop
[
number
]
By default, the local AS
number is not allowed in
routes from a peer or peer
group.
To permit the local AS number to appear in routes from a peer or peer group and specify the appearance
times (IPv6 unicast/multicast address family):
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter BGP IPv6 unicast
address family view,
BGP-VPN IPv6 unicast
address family view, or
BGP IPv6 multicast
address family view.
•
Enter BGP IPv6 unicast address family
view:
a.
bgp
as-number
b.
address-family ipv6
[
unicast
]
•
Enter BGP-VPN IPv6 unicast address
family view:
a.
bgp
as-number
b.
ip vpn-instance
vpn-instance-name
c.
address-family ipv6
[
unicast
]
•
Enter BGP IPv6 multicast address
family view:
a.
bgp
as-number
b.
address-family ipv6 multicast
N/A
