267
Figure 65 AS number substitution configuration (in an IPv4 network)
As shown in
, CE 1 and CE 2 use the same AS number 800. To ensure bidirectional
communication between the two sites, configure AS number substitution on PE 2. PE 2 replaces AS
800 with AS 100 for the BGP route update originated from CE 1 before advertising it to CE 2. Perform
the same configuration on PE 1.
To configure AS number substitution for a peer or peer group (IPv4 unicast/multicast address family):
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter BGP instance view or
BGP-VPN instance view.
•
Enter BGP instance view:
bgp
as-number
[
instance
instance-name
]
•
Enter BGP-VPN instance
view:
a. bgp
as-number
[
instance
instance-name
]
b. ip vpn-instance
vpn-instance-name
N/A
3.
Configure AS number
substitution for a peer or peer
group.
peer
{
group-name
|
ipv4-address
[
mask-length
] }
substitute-as
By default, AS number
substitution is not configured.
To configure AS number substitution for a peer or peer group (IPv6 unicast/multicast address family):
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter BGP instance view or
BGP-VPN instance view.
•
Enter BGP instance view:
bgp
as-number
[
instance
instance-name
]
•
Enter BGP-VPN instance
view:
a. bgp
as-number
[
instance
instance-name
]
b. ip vpn-instance
vpn-instance-name
N/A
3.
Configure AS number
substitution for a peer or peer
group.
peer
{
group-name
|
ipv6-address
[
prefix-length
] }
substitute-as
By default, AS number
substitution is not configured.
MPLS backbone
VPNv4_Update: 10.1.0.0/16
RD: 100:1
AS_PATH: 800
EBGP_Update: 10.1.0.0/16
AS_PATH: 100, 100
PE 1
PE 2
AS 800
EBGP_Update: 10.1.0.0/16
AS_PATH: 800
AS 800
AS 100
CE 1
CE 2
Summary of Contents for HPE FlexNetwork 7500 series
Page 505: ...493 Connector N A ...
