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Number of area in this router is 1, normal 0 stub 0 nssa 1
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OSPF ACK Packing
The OSPF ACK packing feature bundles multiple LS acknowledgements in a single packet, significantly reducing the number of
ACK packets transmitted when the number of LSAs increases.
This feature also enhances network utilization and reduces the number of small ACK packets sent to a neighboring router. OSPF
ACK packing is enabled by default and non-configurable.
OSPF Adjacency with Cisco Routers
To establish an OSPF adjacency between Dell Networking and Cisco routers, the hello interval and dead interval must be the
same on both routers.
In the Dell Networking OS, the OSPF dead interval value is, by default, set to 40 seconds, and is independent of the OSPF
hello interval. Configuring a hello interval does not change the dead interval in Dell Networking OS. In contrast, the OSPF dead
interval on a Cisco router is, by default, four times as long as the hello interval. Changing the hello interval on the Cisco router
automatically changes the dead interval as well.
To ensure equal intervals between the routers, manually set the dead interval of the Dell Networking router to match the Cisco
configuration. Use the ip ospf dead-interval<x> command in INTERFACE mode.
In both examples, the bold lines show the dead interval set at four times the hello interval.
Example of the ip ospf intervals Command
Dell(conf)#int te 2/2
Dell(conf-if-te-2/2)#ip ospf hello-interval 20
Dell(conf-if-te-2/2)#ip ospf dead-interval 80
Dell(conf-if-te-2/2)#
Example of an OSPF Configuration with Intervals Set
Dell (conf-if-te-2/2)#ip ospf dead-interval 20
Dell (conf-if-te-2/2)#do show ip os int te 1/3
TenGigabitEthernet 2/2 is up, line protocol is up
Internet Address 20.0.0.1/24, Area 0
Process ID 10, Router ID 1.1.1.2, Network Type BROADCAST, Cost: 1
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 1.1.1.2, Interface address 30.0.0.1
Backup Designated Router (ID) 1.1.1.1, Interface address 30.0.0.2
Timer intervals configured, Hello 20, Dead 80, Wait 20, Retransmit 5
Hello due in 00:00:04
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 1.1.1.1 (Backup Designated Router)
Dell (conf-if-te-2/2)#
Configuration Information
The interfaces must be in Layer-3 mode (assigned an IP address) and enabled so that they can send and receive traffic. The
OSPF process must know about these interfaces.
To make the OSPF process aware of these interfaces, they must be assigned to OSPF areas.
You must configure OSPF GLOBALLY on the system in CONFIGURATION mode.
OSPF features and functions are assigned to each router using the CONFIG-INTERFACE commands for each interface.
NOTE: By default, OSPF is disabled.
592 Open Shortest Path First (OSPFv2)