Bgp Route Policies; Figure 12 Bgp Route Policy Diagram; Figure 13 Ospf Route Policy Diagram - Alcatel-Lucent 7705 Configuration Manual

Learned BGP
routes from peers

BGP Route Policies

The Alcatel-Lucent implementation of BGP uses route policies extensively. The implied or
default route policies can be overridden by customized route policies. The default BGP
properties, with no route policies configured, behave as follows:
7705 SAR OS Router Configuration Guide
Figure 12: BGP Route Policy Diagram
BGP import
RIB-in
route policy
Reject
Figure 13: OSPF Route Policy Diagram
LSDB
• accept all BGP routes into the RTM for consideration
• announce all used BGP learned routes to other BGP peers
• announce none of the IGP, static, or local routes to BGP peers
RIB-out
BGP export
route policy
Route
Loc-RIB
selection
Submit best
BGP routes
RTM
Inject External OSPF LSAs
OSPF
route
SPF
table
Route Policies
RTM signals which
routes are used
Non-BGP routes are taken
from RTM and exported to BGP
OSPF export
route policy
RTM
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