White Papers

Example of the show ip ospf Command
To conrm that RFC-2328 compliant OSPF ooding is enabled, use the show ip ospf command.
Dell#show ip ospf
Routing Process ospf 1 with ID 2.2.2.2
Supports only single TOS (TOS0) routes
It is an Autonomous System Boundary Router
It is Flooding according to RFC 2328
SPF schedule delay 5 secs, Hold time between two SPFs 10 secs
Number of area in this router is 1, normal 0 stub 0 nssa 1
--More--
OSPF ACK Packing
The OSPF ACK packing feature bundles multiple LS acknowledgements in a single packet, signicantly 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-congurable.
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.
Conguring 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
conguration. Use the ip ospf dead-interval<x> command in INTERFACE mode.
Example of the ip ospf intervals Command
In both examples, the bold lines show the dead interval set at four times the hello interval.
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 Conguration 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)#
Open Shortest Path First (OSPFv2)
641