Information Technology Reference
In-Depth Information
Example 4-39 Policy Accounting Statistics on FastEthernet10/0
R3#show cef interface policy-statistics | begin FastEthernet10/0
FastEthernet10/0 is up (if_number 19)
Corresponding hwidb fast_if_number 19
Corresponding hwidb firstsw->if_number 19
BGP based Policy accounting is enabled
Index Packets Bytes
1 867256 86725600
2 0 0
3 0 0
4 0 0
5 0 0
6 0 0
7 0 0
8 0 0
Case Study: AS Integration via the Local AS
This case study shows you how to integrate two existing autonomous systems (AS 100
and AS 2) into one AS (AS 2) using the Local AS feature. A simple topology is shown in
Figure 4-11. AS 100 is multihomed to three different autonomous systems: 200, 300, and 2.
The prefix 172.15.0.0/16 is generated and advertised to neighboring autonomous systems.
AS 100 also receives the prefix 172.16.0.0/16 generated by AS 400.
Figure 4-11 Network Topology for the Case Study
AS 400
R7
172.16.0.0/16
172.16.0.0/16
AS 300
AS 200
R4
R5
R6
172.15.0.0/16
172.15.0.0/16
AS 100
172.15.0.0/16
R1
R2
R3
AS 2
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