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54-14
User Guide for Cisco Security Manager 4.4
OL-28826-01
Chapter 54 Configuring Routing Policies on Firewall Devices
Configuring OSPF
Area ID Select the area shared by the neighbor OSPF devices. The selected area
cannot be an NSSA or a stub area.
Peer Router Enter the IP address of the virtual link neighbor.
Hello Interval The interval, in seconds, between hello packets sent on an interface.
The smaller the hello interval, the faster topological changes are
detected but the more traffic is sent on the interface. This value must be
the same for all routers and access servers on a specific interface. Valid
values range from 1 to 65535 seconds. The default value is 10 seconds.
Retransmit Interval The time, in seconds, between LSA retransmissions for adjacencies
belonging to the interface. When a router sends an LSA to its neighbor,
it keeps the LSA until it receives the acknowledgement message. If the
router receives no acknowledgement, it will resend the LSA. Be
conservative when setting this value, or needless retransmission can
result. The value should be larger for serial lines and virtual links. Valid
values range from 1 to 65535 seconds. The default value is 5 seconds.
Transmit Delay The estimated time, in seconds, required to send an LSA packet on the
interface. LSAs in the update packet have their ages increased by the
amount specified by this field before transmission. If the delay is not
added before transmission over a link, the time in which the LSA
propagates over the link is not considered. The value assigned should
take into account the transmission and propagation delays for the
interface. This setting has more significance on very low-speed links.
Valid values range from 1 to 65535 seconds. The default value is 1
second.
Dead Interval The interval, in seconds, in which no hello packets are received,
causing neighbors to declare a router down. Valid values range from 1
to 65535. The default value of this field is four times the interval set by
the Hello Interval field.
Authentication Contains the OSPF authentication options.
• None—Choose this option to disable OSPF authentication.
• Password—Choose this option to use clear text password
authentication. This is not recommended where security is a
concern.
• MD5—Choose this option to use MD5 authentication
(recommended).
Authentication Password Contains the settings for entering the password when password
authentication is enabled.
• Password—Enter a text string of up to 8 characters.
• Confirm—Re-enter the password.
Table 54-12 Add/Edit OSPF Virtual Link Configuration Dialog Box (Continued)
Element Description