H3C Technologies H3C SecPath F1000-E - Manual (Page 487)

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To specify a fake AS number for a peer/peer group:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter BGP view. bgp as-number N/A
3. Specify a fake AS number for a
peer/peer group. peer { group-name | ip-address }
fake-as as-number Optional.
Not specified by default.
NOTE:
This command is only applicable to an EBGP peer or peer group.
4. Configure AS number substitution.
To configure AS number substitution for a peer/peer group:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter BGP view. bgp as-number N/A
3. Replace the AS number of a
peer/peer group in the
AS_PATH attribute as the local
AS number.
peer { group-name | ip-address }
substitute-as
Not configured by default.
CAUTION:
Improper AS number substitution configuration may cause route loops; use this command with caution.
5. Remove private AS numbers from updates to a peer/peer group.
To remove private AS numbers from updates to a peer/peer group:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter BGP view. bgp as-number N/A
3. Configure BGP to remove
private AS numbers from the
AS_PATH attribute of updates to
a peer/peer group.
peer { group-name | ip-address }
public-as-only By default, BGP updates carry
private AS numbers.
6. Ignore the first AS number of EBGP route updates.
Typically, BGP checks the AS_PATH attribute of a route update received from a peer. If the first AS
number is not that of the BGP peer, the BGP router discards the route update.
To ignore the first AS number of EBGP route updates:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter BGP view. bgp as-number N/A