Administrator Guide

LSType:Type-5 AS External(5) Age:1 Seq:0x8000000c id:170.1.2.0 Adv:6.1.0.0
Netmask:255.255.255.0 fwd:0.0.0.0 E2, tos:0 metric:0
RFC 2328 is supported by default on Dell EMC Networking OS and it is indicated in the show ip ospf command output.
DellEMC#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, 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.
Setting OSPF Adjacency with Cisco Routers
To establish an OSPF adjacency between Dell EMC Networking and Cisco routers, the hello interval and dead interval must be
the same on both routers.
In Dell EMC 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 EMC 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.
To ensure equal intervals between the routers, use the following command.
● Manually set the dead interval of the Dell EMC Networking router to match the Cisco configuration.
INTERFACE mode
ip ospf dead-interval <x>
In the following example, the dead interval is set at 4x the hello interval (shown in bold).
DellEMC(conf)#int tengigabitethernet 2/2
DellEMC(conf-if-te-2/2)#ip ospf hello-interval 20
Dell(conf-if-te-2/2)#ip ospf dead-interval 80
DellEMC(conf-if-te-2/2)#
In the following example, the dead interval is set at 4x the hello interval (shown in bold).
DellEMC(conf-if-te-2/2)#ip ospf dead-interval 20
DellEMC(conf-if-te-2/2)#do show ip os int tengigabitethernet 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)
DellEMC(conf-if-te-2/2)#
608
Open Shortest Path First (OSPFv2 and OSPFv3)