• Invalid header length
• Invalid total length
Incoming IP Queue Congestion
This count keeps track of the total number of IP datagrams discarded
due to congestion in the incoming queue.
Invalid Fragmented IP Datagrams Received
This count keeps track of the total number of IP datagrams discarded
because reassembly of fragmented packets could not be accomplished.
Since reception of fragmented IP packets is a possible indication of a
network or security issue, this count may be alarmed. The alarm level
can be set to “no alarm” or “minor alarm”. The default is “no alarm”.
IP Unavailable Seconds
This count is detected at the IP layer. The IP layer is considered to be
unavailable whenever the Ethernet layer is automatically inhibited for
10 consecutive seconds and continues to be considered unavailable
until it has been automatically uninhibited for 10 consecutive seconds.
ICMP Layer Performance
Monitoring Parameters
Overview
The following parameters are used to monitor ICMP layer
performance:
• Invalid ICMP Datagrams Received
• ICMP Destination Unreachable Message Received
• ICMP Parameter Problem Message Received
• ICMP Echo Request Message Received
• ICMP TTL Exceeded Message Received
• ICMP Unavailable Seconds
Invalid ICMP Datagrams Received
This count keeps track of the total number of incoming ICMP
datagrams discarded due to the following error types:
• Invalid/Unsupported ICMP message type
• Invalid ICMP checksum
• Invalid ICMP length
• Invalid ICMP code field
Performance Monitoring on SIP PH
Maintenance Considerations
....................................................................................................................................................................................................................................
7-94
Lucent Technologies 235-200-118
Issue 3.02B, March 2007
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