Configuring OSPF and OSPFv3 973
ip ospf transmit-delay 
seconds
Set the OSPF Transit Delay for the interface.
The 
seconds
 variable sets the estimated number of 
seconds it takes to transmit a link state update packet over 
this interface. (Range: 1–3600 seconds)
ip ospf mtu-ignore Disable OSPF MTU mismatch detection on the received 
database description.
ip ospf network 
{broadcast | point-to-
point}
Set the OSPF network type on the interface to broadcast 
or point-to-point. OSPF selects a designated router and 
originates network LSAs only for broadcast networks. No 
more than two OSPF routers may be present on a point-
to-point link.
ip ospf authentication 
{none | {simple 
key
} | 
{encrypt 
key key-id
}}
Set the OSPF Authentication Type and Key for the 
specified interface.
•
encrypt
 — MD5 encrypted authentication key.
•
key
 — Authentication key for the specified interface. 
(Range: 8 bytes or less if the authentication type is 
simple
 and 16 bytes or less if the type is 
encrypt
.)
•
key-id
 — Authentication key identifier for the 
authentication type 
encrypt
. (Range: 0–25)
ip ospf cost 
interface-
cost
Set the metric cost of the interface. 
The 
interface-cost
 variable specifies the cost (link-state 
metric) of the OSPF interface. (Range: 1–65535)
bandwidth 
bw
Set the interface bandwidth used in the formula to 
compute link cost for an interface:
link cost = ref_bw÷interface bandwidth
The 
bw 
variable is the interface bandwidth (Range: 
1–10000000 Kbps).
exit Exit to Global Configuration Mode
router ospf Enter OSPF configuration mode.
passive-interface vlan 
vlan-id
Make an interface passive to prevent OSPF from forming 
an adjacency on an interface. OSPF advertises networks 
attached to passive interfaces as stub networks.
Command Purpose