Dell S4820T, Configuration Manual

Page: 702 / 1178

The default is enabled passive interfaces on ALL interfaces in the OSPF process.
Entering the physical interface type, slot, and number enables passive interface on only the identified
interface.
– For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet
then the slot/port
information.
– For a 40-Gigabit Ethernet interface, enter the keyword
fortyGigE
then the slot/port information.
– For a port channel interface, enter the keywords
port-channel
then a number.
– For a VLAN interface, enter the keyword
vlan
then a number from 1 to 4094.
The keyword
default
sets all interfaces on this OSPF process as passive.
To remove the passive interface from select interfaces, use the
no passive-interface
interface
command while
passive interface default
is configured.
To enable both receiving and sending routing updates, use the
no passive-interface
interface
command.
Example of Viewing Passive Interfaces
When you configure a passive interface, the
show ip ospf process-id interface
command adds
the words
passive interface
to indicate that the hello packets are not transmitted on that interface
(shown in bold).
Dell#show ip ospf 34 int
TenGigabitEthernet 1/1 is up, line protocol is down
Internet Address 10.1.2.100/24, Area 1.1.1.1
Process ID 34, Router ID 10.1.2.100, Network Type BROADCAST, Cost: 10
Transmit Delay is 1 sec, State DOWN, Priority 1
Designated Router (ID) 10.1.2.100, Interface address 0.0.0.0
Backup Designated Router (ID) 0.0.0.0, Interface address 0.0.0.0
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 13:39:46
Neighbor Count is 0, Adjacent neighbor count is 0
TenGigabitEthernet 2/1 is up, line protocol is down
Internet Address 10.1.3.100/24, Area 2.2.2.2
Process ID 34, Router ID 10.1.2.100, Network Type BROADCAST, Cost: 10
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 10.1.2.100, Interface address 10.1.3.100
Backup Designated Router (ID) 0.0.0.0, Interface address 0.0.0.0
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
No Hellos (Passive interface)
Neighbor Count is 0, Adjacent neighbor count is 0
Loopback 45 is up, line protocol is up
Internet Address 10.1.1.23/24, Area 2.2.2.2
Process ID 34, Router ID 10.1.2.100, Network Type LOOPBACK, Cost: 1
Enabling Fast-Convergence
The fast-convergence CLI sets the minimum origination and arrival LSA parameters to zero (0), allowing
rapid route calculation.
When you disable fast-convergence, origination and arrival LSA parameters are set to 5 seconds and 1
second, respectively.
Setting the convergence parameter (from 1 to 4) indicates the actual convergence level. Each
convergence setting adjusts the LSA parameters to zero, but the
fast-convergence
parameter setting
702
Open Shortest Path First (OSPFv2 and OSPFv3)