Avaya Configuring IP, ARP, RIP, and OSPF Services Manual de usuario Pagina 181

  • Descarga
  • Añadir a mis manuales
  • Imprimir
  • Pagina
    / 362
  • Tabla de contenidos
  • MARCADORES
  • Valorado. / 5. Basado en revisión del cliente
Vista de pagina 180
Customizing OSPF Services
117356-E Rev 00
6-11
Choosing a Tag Generation Method for an ASE Advertisement
An OSPF AS external route advertisement includes an external route tag field.
This field allows boundary routers in an AS to exchange information about
external routes. (The specific nature of this information is outside the scope of
OSPF.)
By default, Bay Networks boundary routers that generate ASE advertisements set
the external route tag field to 0. For a boundary router running OSPF and BGP,
you can configure OSPF to set the external route tag field with a value in
accordance with RFC 1403, OSPF/BGP Interaction.
In Figure 6-2
, for example, boundary router R14 running OSPF and BGP learns
external routes via BGP:
1. Router R14 generates an ASE advertisement describing the route. OSPF fills
in the external route tag with BGP-specific information according to RFC
1403.
2. Router R14 injects the ASE into the AS, and OSPF routers flood the ASE
throughout the AS.
3. Router R1, which runs OSPF and BGP, receives the ASE. R1 generates a BGP
update, using the contents of the external route tag to set the Origin and AS
Path attributes in the update.
Note:
This parameter applies to boundary routers only.
Vista de pagina 180
1 2 ... 176 177 178 179 180 181 182 183 184 185 186 ... 361 362

Comentarios a estos manuales

Sin comentarios