Dell Networking S6000 Uživatelský manuál stáhnout pdf (Strana 166)

appear as if it still belongs to Router B’s old network (AS 200) as far as communicating with Router C is

Figure 23. Before and After AS Number Migration with Local-AS Enabled

When you complete your migration, and you have reconfigured your network with the new information,

disable this feature.

If you use the “no prepend” option, the Local-AS does not prepend to the updates received from the

eBGP peer. If you do not select “no prepend” (the default), the Local-AS is added to the first AS segment

in the AS-PATH. If an inbound route-map is used to prepend the as-path to the update from the peer, the

Local-AS is added first. For example, consider the topology described in the previous illustration. If Router

B has an inbound route-map applied on Router C to prepend "65001 65002" to the as-path, the

following events take place on Router B:

1. Receive and validate the update.

2. Prepend local-as 200 to as-path.

Border Gateway Protocol IPv4 (BGPv4)

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Dell Networking S6000 Uživatelský manuál Strana 166