Cabletron Systems SSIM-R8-02 Spécifications télécharger pdf (Page 191)

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Enterasys Xpedition User Reference Manual 171

BGP Configuration Examples

Local Preference Examples

There are two methods of specifying the local preference with the /jointfilesconvert/276250/bgp set peer-group

command:

• Setting the local-pref option. This option can only be used for the internal, routing, and

IGP group types and is not designed to be sent outside of the AS.

• Setting the set-pref option, which allows GateD to set the local preference to reflect

GateD’s own internal preference for the route, as given by the global protocol

preference value. Note that in this case, local preference is a function of the GateD

preference and set-pref options.

Figure 15 shows a BGP configuration that uses the BGP local preference attribute in a

sample BGP configuration with two autonomous systems. All traffic exits Autonomous

System 64901 through the link between router XP13 and router XP11. This is

accomplished by configuring a higher local preference on router XP13 than on router

XP12. Because local preference is exchanged between the routers within the AS, all traffic

from AS 64901 is sent to XP13 as the exit point.

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