Avaya Configuring IP Services Bedienungsanleitung Seite 435

  • Herunterladen
  • Zu meinen Handbüchern hinzufügen
  • Drucken
  • Seite
    / 650
  • Inhaltsverzeichnis
  • LESEZEICHEN
  • Bewertet. / 5. Basierend auf Kundenbewertungen
Seitenansicht 434
Generic Routing Encapsulation Tunnel
303528-A Rev 00
13-5
Accept Policy
An accept policy governs the addition of new routes to the routing tables (see “IP
Routing Policies and Filters on page 1-14). For GRE tunneling, you configure an
accept policy for each routing protocol (RIP, OSPF, BGP) configured on the
logical tunnel interface to block the receipt of advertisements a range of network
addresses that contains the tunnel’s remote physical interface address. To
configure an accept policy for RIP, see “Configuring RIP Accept and Announce
Policies” on page 6-29. To configure an accept policy for OSPF, see “Configuring
OSPF Accept and Announce Policies” on page 7-59. To configure an accept
policy for BGP, see “Configuring BGP Accept and Announce Policies
” on
page 8-55
.
The disadvantage of using an accept policy is that it prevents the receipt of
advertisements of subnets contained in the blocked range. Depending on the
network topology, this configuration may not be desirable.
Static Routes
A static route is a route configuration that designates a specific router within the
intervening network cloud as the next hop to the remote physical tunnel end point.
Because static routes take precedence over routes the router learns dynamically
from routing protocols, this configuration forces the router to direct packets
through the cloud to reach the tunnel’s remote physical address.
The disadvantage of using a static route is that it is fixed. If the path through the
chosen next hop to the remote tunnel end point goes down, the tunnel goes down
as well until you manually reconfigure the static route. Similarly, even if the path
through the chosen next hop becomes more costly than the path through some
other attached router, the tunnel continues to use the costlier path unless you
manually intervene.
Note:
When configuring a static route, be careful not to inadvertently create a
loop.
Seitenansicht 434
1 2 ... 430 431 432 433 434 435 436 437 438 439 440 ... 649 650

Kommentare zu diesen Handbüchern

Keine Kommentare