Avaya Configuring IP Services Manual de usuario Pagina 326

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Configuring IP Services
9-10 117356-A Rev. A
Specifying the Gateway Mode
You can configure the EGP router to operate in one of two gateway modes for any
given IP interface:
Noncore. When the router is configured as a noncore gateway, the AS to
which it belongs acts as a stub AS. It advertises and forwards only traffic that
originated or is destined for a network within its AS.
Core. When the router is configured as a core gateway, the AS to which it
belongs acts as a transit AS. In the core mode, it can advertise and forward
traffic to networks that are reachable inside or outside of its local AS.
If you choose noncore mode, the AS to which this EGP neighbor belongs will act
as a stub AS. That is, it will advertise only networks that reside within the AS.
The default gateway mode is core mode. If the EGP router is reconfigured to run
in noncore mode, the Site Manager automatically configures EGP export route
filters on that IP interface. This action suppresses OSPF external routes to EGP
and the advertisement of any networks learned by EGP.
You can use Site Manager to specify the gateway mode of this EGP neighbor.
Site Manager Procedure
You do this System responds
1. In the Configuration Manager window,
choose Protocols.
The Protocols menu opens.
2. Choose IP. The IP menu opens.
3. Choose EGP. The EGP menu opens.
4. Choose Neighbors. The IP Interface List for EGP window
opens.
5. Click on the IP interface you want. The parameter values for that interface
appear in the window.
6. Set the Gateway Mode parameter. Click
on Help or see the parameter description
on page A-18.
7. Click on Apply, and then click on Done. Site Manager returns you to the
Configuration Manager window.
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