Avaya Configuring IP, ARP, RARP, RIP, and OSPF Services Manual do Utilizador Página 79

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Configuring and Customizing IP
308627-14.20 Rev 00
3-19
Enabling ISP Mode on the Router
IP provides an Internet service provider (ISP) mode of operation. In ISP mode, IP
does the following:
Enables BGP as a soloist. By default, BGP runs as a soloist on all slots
configured with IP interfaces.
Disables IP forwarding caches.
By default, IP maintains a forwarding cache on each IP interface. IP maintains
this table as a cache for routes that are frequently used to forward data packets
that arrive on the interface. However, if the number of frequently used routes
exceeds the size of the forwarding table, the router continually updates the
forwarding cache by removing old routes and installing new route entries.
ISP mode disables all forwarding caches on all IP interfaces and optimizes the
routing table to allow direct forwarding, avoiding the overhead of cache
misses and cache updates.
The following parameter settings also help to optimize router performance and
operation:
By default, ISP mode features are disabled on the router. You can use the BCC or
Site Manager to enable and disable ISP mode as required.
IP Parameters Related to Router Performance
Site Manager BCC Setting See page
Route Filter Support route-filters Disabled 3-15
Maximum Policy Rules max-policies Set as required 3-13
Estimated Networks N/A Set as required 3-11
Redirect redirects Disabled at router
interconnection points
3-33
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