3com S7906E 설치 설명서
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Figure 1-18 Application of BGP AS number substitution
In
, both CE 1 and CE 2 use the AS number of 800. AS number substitution is enabled on
PE 2 for CE 2. Before advertising updates received from CE 1 to CE 2, PE 2 finds that an AS number in
the AS_PATH is the same as that of CE 2 and hence substitutes its own AS number 100 for the AS
number. In this way, CE 2 can normally receive the routing information from CE 1.
AS number substitution also applies to a PE connecting multiple CEs through different interfaces, such
, which connects CE 2 and CE 3.
For a multi-homed CE, that is, a CE connected with multiple PEs, the BGP AS number substitution
function must be used in combination with the site-of-origin (SOO) function. Otherwise, routing loops
may appear.
MPLS L3VPN Configuration Task List
Complete the following tasks to conf
Task
Remarks
Required
Required
Optional
Configure it as needed
Optional
Configure it as needed
Optional
Configure it as needed
Optional
Configure it as needed