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Setting OSPF exit overflow interval
When the number of LSAs in the LSDB exceeds the upper limit, the LSDB is in an overflow state. To
save resources, OSPF does not receive any external LSAs and deletes the external LSAs generated
by itself when in this state.
Perform this task to configure the interval that OSPF exits overflow state.
To set the OSPF exit overflow interval:
1. Enter system view.
system-view
N/A
2. Enter OSPF view.
ospf
[
process-id |
router-id
router-id |
vpn-instance
vpn-instance-name ] *
N/A
3. Set the OSPF exit overflow
interval.
lsdb-overflow-interval
interval
The default setting is 300
seconds.
The value of 0 indicates that
OSPF does not exit overflow
state.
Enabling compatibility with RFC 1583
RFC 1583 specifies a different method than RFC 2328 for selecting the optimal route to a destination
in another AS. When multiple routes are available to the ASBR, OSPF selects the optimal route by
using the following procedure:
1. Selects the route with the highest preference.
ï‚¡ If RFC 2328 is compatible with RFC 1583, all these routes have equal preference.
ï‚¡ If RFC 2328 is not compatible with RFC 1583, the intra-area route in a non-backbone area
is preferred to reduce the burden of the backbone area. The inter-area route and intra-area
route in the backbone area have equal preference.
2. Selects the route with the lower cost if two routes have equal preference.
3. Selects the route with the larger originating area ID if two routes have equal cost.
To avoid routing loops, set identical RFC 1583-compatibility on all routers in a routing domain.
To enable compatibility with RFC 1583:
1. Enter system view.
N/A
2. Enter OSPF view.
ospf
[
process-id |
router-id
router-id |
vpn-instance
vpn-instance-name ] *
N/A
3. Enable compatibility
with RFC 1583.
rfc1583 compatible
By default, compatibility with RFC
1583 is enabled.
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