
Customizing EGP Services
114065 Rev. A 7-7
Specifying the Neighbor’s Address
You define the neighbor-to-neighbor relationship by specifying the IP address of
the router that is to be the remote neighbor.
You can use Site Manager to supply the address of the remote neighbor.
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 reachable interior or exterior to its local 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 is done to suppress 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.
If you choose Non Core, the AS to which this EGP neighbor belongs will act as a
stub AS. That is, it will only advertise networks that reside within the AS.
Site Manager: Remote Autonomous System IP Address parameter: page A-19
Site Manager: Gateway Mode parameter: page A-19
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