3com 3.01.01 User Manual
BGP
143
By default, no autonomous systems are configured as a member of the
confederation.
confederation.
Configure the AS Confederation Nonstandard
I
f it is necessary to perform the interconnection with devices whose BGP
implementation confederation is different from that of RFC1965, you must
configure all the routers in the confederation.
configure all the routers in the confederation.
Perform the following configurations in BGP view..
By default, the configured confederation is consistent with RFC1965.
Defining ACLs, AS Path List, and Route-policy
This section describes the configuration of ACL, AS path list, and Route-policy.
Defining the ACL
Defining the AS path list
The routing information packet of BGP includes an AS path domain. The AS
path-list can be used to match the autonomous system path domain of the BGP
routing information to filter the routing information which does not conform to
the requirements. For the same list number, the user can define multiple portions
of the AS path-list, i.e. a list number stands for a group of AS path ACLs. Each AS
path list is identified with a number.
path-list can be used to match the autonomous system path domain of the BGP
routing information to filter the routing information which does not conform to
the requirements. For the same list number, the user can define multiple portions
of the AS path-list, i.e. a list number stands for a group of AS path ACLs. Each AS
path list is identified with a number.
Perform the following configurations in system view: .
By default, no AS path list is defined.
During the matching, the relationship of “OR” is available between the members
(acl-number) of the ACLs, so that when the routing information passes through
one piece of this group of lists, it means that the routing information has been
filtered by this group of as-path lists identified with this list number.
(acl-number) of the ACLs, so that when the routing information passes through
one piece of this group of lists, it means that the routing information has been
filtered by this group of as-path lists identified with this list number.
Defining Route-policy See “Defining Route-policy” on page 143.
Remove the specified sub-AS from the
confederation
confederation
undo confederation peer-as [ as-number-1 ]
[ ...as-number-n ]
[ ...as-number-n ]
Table 127 Configuring AS Confederation Attribute Compatible with Nonstandard
Operation
Command
Configure AS confederation attribute
compatible with nonstandard router
compatible with nonstandard router
confederation nonstandard
Cancel AS confederation attribute compatible
with nonstandard router
with nonstandard router
undo confederation nonstandard
Table 128 Defining the AS path list
Operation
Command
Define the AS path list
ip as-path-acl acl-number { permit | deny }
as-regular-expression
as-regular-expression
Delete the specified AS list
undo ip as-path-acl acl-number
Table 126 Configuring a Sub-AS Belonging to the Confederation
Operation
Command