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101

Configuring IP Services

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303528-A Rev 00

Supplying Modification Values for a BGP Announce Policy

You can use the BCC or Site Manager to supply values that BGP uses to modify

fields in a BGP update that matches the policy.

Using Site Manager

Navigate to the policy-specific prompt and enter:

modify

For example, the following command invokes a modification prompt for BGP

announce policy pol_1:

announce/pol_1//jointfilesconvert/92449/bgp# modify

modify//jointfilesconvert/92449/bgp/announce/pol_1#

To supply anvalue, enter:

parameter value

parameter value is one of the parameter/value pairs shown in Table 8-10.

Table 8-10. BCC Override Parameters for BGP Announce Policies

Parameter Values Function

as-path Null (default) or an

AS path

Specifies an AS path that overrides the AS-path

attribute of a route matching this policy. An AS

path is composed of AS path segments. Each

AS path segment includes a path segment type,

a path segment length specifying the number of

ASs in the segment, and a path segment value

containing one or more AS numbers. There are

two AS path segment types: type 1, an

unordered set of ASs that a route in the

UPDATE message has traversed; and type 2, an

ordered set of ASs that a route in the UPDATE

message has traversed.

AS path prepend List of AS numbers Specifies AS numbers that BGP adds to an AS

path before it adds the current

AS to the path

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