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50-11
User Guide for Cisco Security Manager 4.4
OL-28826-01
Chapter 50 Configuring Hostname, Resources, User Accounts, and SLAs
Monitoring Service Level Agreements (SLAs) To Maintain Connectivity
Request Data Size The size of the ICMP request packet payload, in bytes. Values range
from 0 to 16384 bytes. The default is 28 bytes, which creates a total
ICMP packet of 64 bytes. Do not set this value higher than the
maximum allowed by the protocol or the Path Maximum Transmission
Unit (PMTU).
For purposes of reachability, you might need to increase the default
data size to detect PMTU changes between the source and the target. A
low PMTU can affect session performance and, if detected, might
indicate that the secondary path should be used.
ToS The type of service (ToS) defined in the IP header of the ICMP request
packet. Values range from 0 to 255. The default is 0.
This field contains information such as delay, precedence, reliability,
and so on. It can be used by other devices on the network for policy
routing and features such as committed access rate.
Number of Packets The number of packets that are sent. Values range from 1 to 100. The
default is 1 packet.
Tip Increase the default number of packets if you are concerned that
packet loss might falsely cause the security appliance to believe
that the monitored address cannot be reached.
Category The category assigned to the object. Categories help you organize and
identify rules and objects. See Using Category Objects, page 6-12.
Table 50-4 SLA Monitor Dialog Box (Continued)
Element Description