Table 562 Asbr Command; Asbr - Nokia 7302 Manual

Virtual Private Routed Network Service
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7.10.10.25
Table 562
534
Item Description
Default default-metric 1
Parameters metric — The metric expressed as a decimal integer for the default route cost to be advertised
into the stub area.
Values: 1 — 16777215

asbr

asbr command
Item Description
Syntax [no] asbr
Context configure>service>vprn>ospf
Description This command configures the system as a Autonomous System Boundary Router (ASBR) if
the router is to be used to export routes from the Routing Table Manager (RTM) into this
instance of OSPF. Once a router is configured as an ASBR, the export policies into this OSPF
domain take effect. If no policies are configured no external routes are redistributed into the
OSPF domain.
The no form of the command removes the ASBR status and withdraws the routes redistributed
from the Routing Table Manager into this instance of OSPF from the link state database.
When an external route is originated by an ASBR using an internal OSPF route in a given
domain, the corresponding bit is set in the AS-external LSA. As the route gets redistributed
from one domain to another, more bits are set in the tag mask, each corresponding to the
OSPF domain the route visited. Route redistribution looping is prevented by checking the
corresponding bit as part of the export policy; if the bit corresponding to the announcing OSPF
process is already set, the route is not exported there.
asbr trace-path 5
Domain-IDs are incompatible with any other use of normal tags. The domain ID should be
configured with a value between 1 and 31 by each router in a given OSPF domain (OSPF
Instance).
When an external route is originated by an ASBR using an internal OSPF route in a given
domain, the corresponding (1-31) bit is set in the AS-external LSA.
As the route gets redistributed from one domain to another, more bits are set in the tag mask,
each corresponding to the OSPF domain the route visited. Route redistribution looping is
prevented by checking the corresponding bit as part of the export policy; if the bit
corresponding to the announcing OSPF process is already set, the route is not exported there.
Default no asbr — The router is not an ASBR.
3HH-11985-AAAA-TQZZA
FD 100/320Gbps NT and FX NT IHub Services Guide
0/MSB
0000 0000 0000 0000 0000 0000 0000 0000
0000 0100 0000 0000 0000 0000 0000 0000
LSB/31
Issue: 13