Alcatel-Lucent 7750 SR Manual page 1404

VPRN Service Configuration Commands
Default no external-db-overflow — No limit on non-default AS-external-LSA entries.
Parameters limit — The maximum number of non-default AS-external-LSA entries that can be stored in the
interval — The number of seconds after entering an overflow state before attempting to process non-
external-preference
Syntax external-preference preference
no external-preference
Context config>service>vprn>ospf
config>service>vprn>ospf3
Description
This command configures the preference for OSPF external routes.
A route can be learned by the router from different protocols in which case the costs are not
comparable; when this occurs the preference is used to decide which route will be used.
Different protocols should not be configured with the same preference, if this occurs the tiebreaker is
per the default preference table as defined in the following table. If multiple routes are learned with an
identical preference using the same protocol, the lowest cost route is used.
If multiple routes are learned with an identical preference using the same protocol and the costs
(metrics) are equal, then the decision of what route to use is determined by the configuration of the
ecmp in the config>router context.
The no form of the command reverts to the default value.
Default external-preference 150 — OSPF external routes have a default preference of 150.
Parameters preference — The preference for external routes expressed as a decimal integer.
Page 1404
LSDB before going into an overflow state expressed as a decimal integer.
Values -1 — 2147483647
default AS-external-LSAs expressed as a decimal integer.
Values
0 — 2147483647
Route Type
Direct attached
Static routes
OSPF internal
IS-IS level 1 internal
IS-IS level 2 internal
RIP
OSPF external
IS-IS level 1 external
Preference
0
5
10
15
18
100
150
160
7750 SR OS Services Guide
Configurable
No
Yes
a
Yes
Yes
Yes
Yes
Yes
Yes